2003 Chevrolet Trailblazer Ext Transmission Parts

Name: Multi Purpose Seal
Brand: National
SKU: 710506
Price: 17.99 USD
Rating: 4.0 (14 reviews)

Below you will find various in-demand Chevrolet Transmission Parts, components and accessories for your 2003 Trailblazer Ext. Advance Auto Parts has popular Trailblazer Ext parts like Transmission Cooler and Parts, Transmission Bearings, Transmission Seals and more. You’ll also find aftermarket and OEM Transmission Parts for other Trailblazer Ext model years including 2002, 2004, 2005, 2006 and more. Select a category of 2003 Chevrolet Trailblazer Ext Transmission Parts below and start saving instantly.

Please Select your Vehicle to See Exact Fit Parts

Popular 2003 Chevrolet Trailblazer Ext Transmission Parts Categories

Gear Shift Levers

Automatic Transmission Shift Linkage Bushings

Transmission Torque Converters

OE Transmission Coolers

Torque Converter Hardware

Transmission Solenoids

Transmission Oil Cooler Lines

Transmission Shift Cables

Manual Transmission Output Shaft Bearings

Automatic Transmission Torque Converter Clutch Solenoids

Automatic Transmission Shift Solenoids

Transmission Pan Gaskets

Automatic Transmission Drain Plugs

Shift Interlock Solenoids

Transmission Oil Cooler Fittings

Automatic Transmission Line Connectors

Pinion Bearings

Transmission Mounts

Transmission Oil Pans

Transmission Master Repair Kits

Transmission Oil Pressure Switches

Transmission Oil Pan Gaskets

Automatic Transmission Wiring Harness

Transmission Dipsticks

Speed Sensors

Automatic Transmission Differential Bearings

Transmission Speed Sensors

Automatic Transmission Output Shaft Seals

Automatic Transmission Oil Pump Seals

Pinion Seals

Neutral Safety Switch Connectors

Transmission Seals and O-rings

Back Up Light Relays

Back Up Light Switch Connectors

Torque Converter Seals

Extension Housing Seals

Manual Transmission Output Shaft Seals

Shaft Seals

Back Up Lamp Connectors

Transmission Bands

Automatic Transmission Flexplate Mounting Bolts

Automatic Transmission Output Shaft Bearings

Neutral Safety Relays

Remanufactured Automatic Transmissions

Torque Converter Bearings

Automatic Transmission Torque Conv. Clutch Solenoid Connector

Essential Transmission Parts for 2003 Chevrolet Trailblazer Exts

from

$17.99

Product Features:

Design type: spring loaded; multi-lip
Temperature range: -40 Deg F to 225 Deg F / -40 Deg C to 107 Deg C
Good low temperature capability
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$16.49

Value-priced bearing meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$35.99

This automatic transmission oil cooler hose assembly is designed to match the fit and function of an original assembly. It is engineered from durable components as a reliable replacement for leaking or damaged lines on specified vehicles.

Product Features:

Direct replacement – this automatic transmission oil cooler hose assembly is designed to match the fit and function of the original equipment assembly on specified vehicle makes, models and years
Ideal solution – engineered to help ensure proper transmission cooling when the original assembly is leaking or has failed from corrosion, collision, vibration, or fitting damage
Durable construction – made of quality materials for reliable performance and Length service life
Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience

from

$56.99

Shift Solenoid

from

$10.99

Value-priced bearing meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$48.99

Product Features:

Durable polyurethane to handle the stress of high horsepower
Same durometer as other BlackHeart and Hooker poly mounts
Can be used in place of 1-bolt or 2-bolt mount
Absorbs vibration and last longer than rubber
Ideal for use on street or strip applications
Molded indentions for socket clearance to ease installation
Complete with Grade 8 mounting hardware
Bolt Spacing on the Wider Side: 4-inch
Bolt Spacing on the Narrow Side: 1.5-inch

from

$32.49

Pro-King is the leading supplier of transmission and driveline products in the aftermarket. All products are designed to meet or exceed OE quality, form, fit and function.

Product Features:

Meets or exceeds OE specifications

from

$25.99

Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.

Product Features:

PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION – Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN – Engineered to meet OE specifications
COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on

from

$499.99

The B&M Quicksilver features a ratcheting action for positive shifts, Chrome Knob, neutral safety switch, NHRA/IHRA approved Reverse Lockout. Fits Most 3 and 4 speeds.

Product Features:

Universal Floor Mount Application
Base Trimmed For Custom Fit
Cable Operated
Quick Installation
Accurate Shifting

from

$62.99

ACDelco GM Original Equipment Pigtail Connectors are connectors ready to be spliced into vehicle harnesses, and are GM-recommended replacements for your vehicle’s original components. These original equipment pigtail connectors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

Protective outer coverings help provide long-lasting durability
Color-coded wires allow for easy installation
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

from

$12.99

National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.

Product Features:

Design type: spring loaded; multi-lip
Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
Resistance to EP lubricants
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$18.99

Relays are electrical switches used to convert a small electrical load into a circuit capable of handling a high amperage load. Computers and small switches are not designed to carry the higher amperage requirement of a circuit that may have an electric motor, solenoid, or high amperage lighting fixture. Within a relay are contacts that are controlled with electromagnetism, when the circuit switch commands the device on or off, magnetism will pull or release the contact arm closing or opening the contacts within the relay that carry the voltage.

Product Features:

Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
Computer-Aided Design (CAD), laser scanning and 3D printing ¿ utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) ¿ in the part design process ensures speed-to-market and a precise fit guaranteed.
Computer-Aided Design (CAD), laser scanning and 3D printing ┐ utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) ┐ in the part design process ensures speed-to-market and a precise fit guaranteed.
Where applicable, robust circuit board design increases durability due to heat, shock, and random electro-magnetic pulses (EMP) and power spikes.
Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
100% end-of-line tested to ensure accurate signal output providing product reliability, every time.

from

$84.99

AT PRESS SW MANIFOLD

from

$109.99

Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:

Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
Sealed connections (where applicable) to prevent environmental corrosion and performance issues
Global coverage for import and/or domestic applications
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

from

$52.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Mid-size and full-size cars, pickups
GVWR up to 18,000 lbs.; towing up to 3,500 lbs
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators

from

$9.99

Product Features:

Brand may vary by location

from

$216.99

ATHARNESS VSS REPR

from

$18.99

Design type: spring loaded; multi-lip
Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
Resistance to EP lubricants
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$97.99

This direct replacement ABS wheel speed sensor matches the fit and function of an original equipment sensor. Made of quality materials with factory-style electrical connectors, this sensor has been designed and tested to be durable and reliable.

Product Features:

Ideal replacement – this ABS wheel speed sensor exactly matches the fit and function of the original equipment sensor to restore safe braking performance in all conditions
Durable construction – this wheel speed sensor is made from quality materials to ensure a reliable repair and a long service life
Cost-effective solution – offers original equipment quality at a competitive price
Quality tested – this ABS sensor has undergone try-on and material testing to ensure a quality fit and reliable performance

from

$10.49

This transmission drain plug is designed to match the dimensions and function of the original plug on specified applications. Made of quality materials, it is engineered for reliable performance and durability.

Product Features:

Direct replacement – this transmission drain plug matches the dimensions and function of the factory hardware on specified vehicle years, makes and models
Ideal solution – this drain plug is a reliable replacement for an original part that is damaged or lost during service
Durable construction – this part is made from quality materials to ensure reliable performance and a long service life
Quality assured – backed by a team of product experts in the United States and more than a century of automotive experience

from

$35.99

Made from cork/neoprene gasket material which features excellent compressibility and high recovery to create a positive seal.

Product Features:

High density cork-nitrile rubber blend
Excellent compressibility and high recovery to create a positive seal
Excellent Compressibility

from

$65.99

Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
Sealed connections (where applicable) to prevent environmental corrosion and performance issues
Global coverage for import and/or domestic applications
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

from

$972.99

Converter: 4L60E 32-3600 Stall

from

$8.99

Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.

Product Features:

PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION – Crowned raceways for even load distribution
OE-STYLE DESIGN – Engineered to meet OE specifications
COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on

from

$37.99

Design type: spring loaded; multi-lip
Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
Good low temperature capability
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$59.99

Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
Sealed connections (where applicable) to prevent environmental corrosion and performance issues
Global coverage for import and/or domestic applications
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

from

$10.49

This torque converter hardware is designed to match the fit and function of the original hardware on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

Direct replacement – this torque converter hardware is designed to match the fit and function of the original hardware on specified vehicles
Ideal solution – this hardware is a reliable replacement for original hardware that has failed due to fatigue
Durable construction – this hardware is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

from

$6.99

Product Features:

Design type: springless; single-lip
Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
Good low temperature capability
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

Upgrade your 2003 Chevrolet Trailblazer Ext with Top-Quality Transmission Parts

When it comes to maintaining or upgrading your 2003 Chevrolet Trailblazer Ext, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Chevrolet or enhancing its overall performance, Transmission Parts are key to keeping your Trailblazer Ext functioning at its best. At Advance Auto Parts, we offer a wide selection of 127 Transmission Parts for the 2003 Chevrolet Trailblazer Ext, designed to meet your needs without breaking the bank. From Transmission Cooler and Part replacements to Transmission Bearings upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Transmission Parts for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Transmission Parts for your 2003 Chevrolet Trailblazer Ext at great prices. Our Transmission Parts inventory for this model ranges from just $3.99 to $4,715.99, with an average price of $347.15. Our 127 Transmission Parts in stock come from 24 trusted brands, so you’re sure to find the right part for your 2003 Chevrolet Trailblazer Ext without overspending.

Top Brands and High Customer Satisfaction

Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 2003 Chevrolet Trailblazer Ext, we stock popular OEM and aftermarket Transmission Parts from top names like National, Dorman, Imperial, and more. National Transmission Parts start at just $6.99 and boast an impressive 4.3 stars average rating from customers. Dorman and Imperial also bring quality to the table, with Transmission Parts available starting at $8.99, and at an average 4.2 stars rating. With 2,826 customer reviews and counting, our 2003 Chevrolet Trailblazer Ext Transmission Parts have a strong track record of reliability, ensuring you can trust your purchase.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Transmission Part upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 2003 Chevrolet Trailblazer Ext is always ready to roll. We’re committed to providing you with everything you need to keep your Trailblazer Ext in top shape, all in one place. Start shopping confidently below for your 2003 Chevrolet Trailblazer Ext!

Best-Selling Transmission Cooler and Parts for 2003 Chevrolet Trailblazer Exts

Enhance the driving experience in your Chevrolet with 15 quality Transmission Cooler and Part components, starting at $11.99.

show more show less

from

$31.99

Direct replacement – this automatic transmission oil cooler hose assembly is designed to match the fit and function of the original equipment assembly on specified vehicle makes, models and years
Ideal solution – engineered to help ensure proper transmission cooling when the original assembly is leaking or has failed from corrosion, collision, vibration, or fitting damage
Durable construction – made of quality materials for reliable performance and long service life
Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience

from

$41.99

Direct replacement – this automatic transmission oil cooler hose assembly is designed to match the fit and function of the original equipment assembly on specified vehicle makes, models and years
Ideal solution – engineered to help ensure proper transmission cooling when the original assembly is leaking or has failed from corrosion, collision, vibration, or fitting damage
Durable construction – made of quality materials for reliable performance and Length service life
Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience

from

$85.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial high-performance transmission cooler
Size: 3/4″ x 10″ x 15-7/8″
SAE 45-degree fittings for maximum reliability
Electrostatic powder-coated to prevent corrosion
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction

from

$35.99

Direct replacement – this automatic transmission oil cooler hose assembly is designed to match the fit and function of the original equipment assembly on specified vehicle makes, models and years
Ideal solution – engineered to help ensure proper transmission cooling when the original assembly is leaking or has failed from corrosion, collision, vibration, or fitting damage
Durable construction – made of quality materials for reliable performance and Length service life
Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience

from

$73.99

The Imperial Maxi-Cool XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.

Product Features:

Imperial Maxi-Cool plate and fin transmission cooler
Size: 3/4″ x 11″ x 7-1/2″
Mid-size and full-size cars, pickups
GVWR up to 20,000 lbs.; towing up to 2,500 lbs.
Compatible with OEM cooler systems
Made with the highest quality materials
100% pressure testing to 150 PSI for quality assurance
33% more efficient than a comparable tube and fin design

from

$61.99

The Imperial Maxi-Cool XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.

Product Features:

Imperial Rapid-Cool plate and fin transmission cooler
Size: 3/4″ x 11″ x 6″
Sub-compact to compact cars
GVWR up to 18,000 lbs.
Compatible with OEM cooler systems
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators

from

$11.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial mounting kit system
For installation of transmission coolers and electric fans
Provides quick, effective installation of Imperial products
Contains nylon mounting rods, foam pads and locking buttons
Aftermarket electric fan and cooler mounting rods
Made with the highest quality materials
Quality machined for durability
Removable buttons for relocation
Aftermarket electric fan and cooler mounting rods
Made with the highest quality materials
Quality machined for durability
Removable buttons for relocation

from

$55.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial Econo-Kool tube and fin transmission cooler
Size: 3/4″ x 5″ x 15-7/8″
Compact and mid-size cars
GVWR up to 16,000 lbs.; towing up to 2,500 lbs.
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators

from

$40.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial Econo-Kool tube and fin transmission cooler
Size: 3/4″ x 5″ x 12-1/2″
Sub-compact to compact cars
GVWR up to 12,000 lbs.
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators

from

$80.99

The Imperial Maxi-Cool XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.

Product Features:

Imperial Rapid-Cool plate and fin transmission cooler
Size: 3/4″ x 11″ x 9-1/2″
Pickup trucks and vans, class “C” motor homes, travel trailers to 24′
GVWR up to 24,000 lbs.; towing up to 5,000 lbs.
33% more efficient than a comparable tube and fin design
Compatible with OEM cooler systems
Made with the highest quality materials
100% pressure testing to 150 PSI for quality assurance
33% more efficient than a comparable tube and fin design

from

$52.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Mid-size and full-size cars, pickups
GVWR up to 18,000 lbs.; towing up to 3,500 lbs
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators

from

$79.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial high-performance transmission cooler
Size: 3/4″ x 7-1/2″ x 15-7/8″
SAE 45-degree fittings for maximum reliability
Electrostatic powder-coated to prevent corrosion
Up to Class C motorhomes, towing up to 5,000 pounds
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction

from

$45.99

Direct replacement – this automatic transmission oil cooler hose assembly is designed to match the fit and function of the original equipment assembly on specified vehicle makes, models and years
Ideal solution – engineered to help ensure proper transmission cooling when the original assembly is leaking or has failed from corrosion, collision, vibration, or fitting damage
Durable construction – made of quality materials for reliable performance and long service life
Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience

from

$25.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Transmission cooler reinstallation kit
Contains part numbers 248001, 226201, 240250 and 4 hose clamps
Provides all hardware for reinstallation of Imperial transmission coolers
Contains nylon mounting rods, foam pads, locking buttons, hose and fitting
Made of high grade nylon for easy installation
Removable buttons for cooler/fan relocation
Made for both transmission coolers and electric fan installation
Comes with Quick Connect coupler

from

$60.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial high-performance transmission cooler
Size: 3/4″ x 7-1/2″ x 12-1/2″
SAE 45-degree fittings for maximum reliability
Electrostatic powder-coated to prevent corrosion
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction

Most Popular 2003 Chevrolet Trailblazer Ext Transmission Bearings

Customize your Chevrolet with 8 Transmission Bearings products like Automatic Transmission Differential Bearings, Pinion Bearings, and Manual Transmission Output Shaft Bearings, all priced under $25.99.

show more show less

from

$8.99

Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.

Product Features:

PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION – Crowned raceways for even load distribution
OE-STYLE DESIGN – Engineered to meet OE specifications
COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on

from

$11.49

Value-priced bearing meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$25.99

Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.

Product Features:

PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION – Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN – Engineered to meet OE specifications
COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on

from

$16.49

Value-priced bearing meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$10.99

Value-priced bearing meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$8.99

Product Features:

Brand may vary by location

from

$23.79

With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.

Product Features:

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

from

$7.99

Product Features:

PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION: Crowned raceways for even load distribution
OE-STYLE DESIGN: Engineered to meet OE specifications
COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on

Top Picks for 2003 Chevrolet Trailblazer Ext Transmission Seals

Upgrade Chevrolet Trailblazer Exts with top-quality Transmission Seals parts, including 8 OEM and aftermarket selections for your 2003 model.

show more show less

from

$18.99

Design type: spring loaded; multi-lip
Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
Resistance to EP lubricants
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$12.99

Design type: spring loaded; multi-lip
Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
Resistance to EP lubricants
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$20.99

Design type: spring loaded; multi-lip
Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
Resistance to EP lubricants
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$6.99

Product Features:

Design type: springless; single-lip
Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
Good low temperature capability
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$17.99

Product Features:

Design type: spring loaded; multi-lip
Temperature range: -40 Deg F to 225 Deg F / -40 Deg C to 107 Deg C
Good low temperature capability
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$3.99

Value-priced seal meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$37.99

Design type: spring loaded; multi-lip
Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
Good low temperature capability
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$9.99

Product Features:

Brand may vary by location

In-Demand Transmission Mounts for 2003 Chevrolet Trailblazer Exts

Select from 4 premium Transmission Mounts parts for your 2003 Chevrolet Trailblazer Ext, with prices ranging from $48.99 to $78.99.

show more show less

from

$78.99

Anchor 3027 This mount supports the transmission and dampens vibration. Each mount is specifically engineered and designed to OE standards. Natural and SBR rubber provide maximum life and performance. Steel fasteners are heat treated grade 5 bolts. A special bonding agent is used to ensure a rubber to metal bond. Rubber material is mixed to specific Durometer, hardness.

Product Features:

MAXIMUM LIFE & PERFORMANCE: Both natural and SBR (Styrene Butadiene) rubber provide good abrasion resistance and aging stability to ensure maximum life and performance.
MEETS OR EXCEEDS DUROMETER MEASUREMENTS: All rubber material is manufactured to specific Durometer (hardness) measurements based on the vehicle’s application requirements.
HARDENED STEEL FASTENERS: All fasteners are made of hardened steel with heat treated Grade #5 bolts.
SUPERIOR BOND: A special Chemlok bonding agent is used to ensure a superior rubber-to-metal bond.
HYDRAULIC MOUNT DESIGN: Hydraulic Mounts (applicable where OE) are designed for most front wheel drive vehicles because transverse drive train mounting.
For Years: 2002-2009
Weight approx: 4 Lbs
Part Group: 3021, 3021, 3027

from

$71.99

Anchor 3236 This mount supports the transmission and dampens vibration. Each mount is specifically engineered and designed to OE standards. Natural and SBR rubber provide maximum life and performance. Steel fasteners are heat treated grade 5 bolts. A special bonding agent is used to ensure a rubber to metal bond. Rubber material is mixed to specific Durometer, hardness.

Product Features:

MAXIMUM LIFE & PERFORMANCE: Both natural and SBR (Styrene Butadiene) rubber provide good abrasion resistance and aging stability to ensure maximum life and performance.
MEETS OR EXCEEDS DUROMETER MEASUREMENTS: All rubber material is manufactured to specific Durometer (hardness) measurements based on the vehicle’s application requirements.
HARDENED STEEL FASTENERS: All fasteners are made of hardened steel with heat treated Grade #5 bolts.
SUPERIOR BOND: A special Chemlok bonding agent is used to ensure a superior rubber-to-metal bond.
HYDRAULIC MOUNT DESIGN: Hydraulic Mounts (applicable where OE) are designed for most front wheel drive vehicles because transverse drive train mounting.
For Years: 2003-2009
Weight approx: 4 Lbs

from

$53.99

Product Features:

Durable polyurethane to handle the stress of high horsepower
Same durometer as other BlackHeart and Hooker poly mounts
Can be used in place of 1-bolt or 2-bolt mount
Absorbs vibration and last longer than rubber
Ideal for use on street or strip applications
Molded indentions for socket clearance to ease installation
Complete with Grade 8 mounting hardware
Bolt Spacing on the Wider Side: 4-inch
Bolt Spacing on the Narrow Side: 1.5-inch

from

$48.99

Product Features:

Durable polyurethane to handle the stress of high horsepower
Same durometer as other BlackHeart and Hooker poly mounts
Can be used in place of 1-bolt or 2-bolt mount
Absorbs vibration and last longer than rubber
Ideal for use on street or strip applications
Molded indentions for socket clearance to ease installation
Complete with Grade 8 mounting hardware
Bolt Spacing on the Wider Side: 4-inch
Bolt Spacing on the Narrow Side: 1.5-inch

Most Sold 2003 Chevrolet Trailblazer Ext Automatic Transmission Parts

Explore our best-selling Chevrolet parts for the 2003 Trailblazer Ext among 26 OEM and aftermarket options starting from $16.99.

show more show less

from

$56.99

Shift Solenoid

from

$32.49

Pro-King is the leading supplier of transmission and driveline products in the aftermarket. All products are designed to meet or exceed OE quality, form, fit and function.

Product Features:

Meets or exceeds OE specifications

from

$36.99

Pro-King is the leading supplier of transmission and driveline products in the aftermarket. All products are designed to meet or exceed OE quality, form, fit and function.

Product Features:

Meets or exceeds OE specifications

from

$18.99

Fixing a broken automatic transmission shift cable usually requires replacing the entire cable assembly. This 4-piece assortment of Dorman OE FIX shift cable replacement bushings saves expense by allowing the replacement of just the failed bushing.

Product Features:

Convenient solution – this shift cable bushing assortment directly replaces a broken bushing and eliminates the need to replace the entire cable assembly
Save time and money – save the expense and significant installation time of replacing an entire cable assembly
Ensure fit – this bushing assortment is vehicle-specific and precision-engineered for specified General Motors, Chrysler and Saab models and years
Trustworthy quality – designed in the United States and backed by more than a century of automotive aftermarket excellence

from

$16.99

Fixing a broken automatic transmission shift cable usually requires replacing the entire cable assembly. This 2-piece assortment of Dorman OE FIX bushings saves expense by allowing the replacement of just the failed bushing.

Product Features:

Convenient solution – this shift cable bushing assortment directly replaces a broken bushing and eliminates the need to replace the entire cable assembly
Save time and money – save the expense and significant installation time of replacing an entire cable assembly
Ensure fit – this bushing assortment is vehicle-specific and precision-engineered for specified General Motors, Chrysler and Saab models and years
Trustworthy quality – designed in the United States and backed by more than a century of automotive aftermarket excellence

from

$22.99

This automatic transmission dipstick is designed to match the fit and function of the original dipstick on specified vehicles, and is engineered for durability and reliable performance.

Product Features:

Direct replacement – this automatic transmission dipstick is designed to match the fit and function of the original dipstick on specified vehicles
Restores functionality – reliable replacement for an original dipstick that has bent or broken due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

from

$32.49

An automatic transmission is a hydraulic multi-speed device that does not require any input from the vehicle operator other than selecting vehicle direction. Hydraulic pressure is controlled by a series of electronic shift solenoids that are commanded by the transmission control module. Planetary gear sets and hydraulically controlled shift plates and brake bands apply power to the main shaft in the transmission and out to the vehicles drive wheels.

Product Features:

Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
Precision-wound coated copper windings increase product durability and life cycle.
100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
100% end-of-line tested to ensure product reliability, every time.

from

$36.49

AUTO TRANS BAND

from

$216.99

ATHARNESS VSS REPR

from

$127.99

ATHARNESS VSS REPR

from

$2482.99

All transmissions are completely disassembled and cleaned. All cases are media-blasted. Internal parts are inspected for wear or damage and replaced as required. All bushings are inspected and replaced as necessary. All friction components are replaced with upgraded heavy-duty parts. Drum assemblies are air-checked and side play is measured to ensure proper clearance. All seals, O-rings, and gaskets are replaced. All solenoids are tested and replaced if they do not pass duty-cycle specifications. Internal wiring harnesses are inspected and replaced as necessary. Valve bodies are disassembled, cleaned, and measured for wear. Valves and valve bores are inspected, and bores are machined as required. Completed valve bodies are tested for proper operation prior to dyno testing.

Product Features:

Each transmission undergoes rigorous dyno testing to verify precise hydraulic pressures, smooth shifting, torque converter function, and park lock operation-guaranteeing reliable, trouble-free driving.
Every transmission is fully disassembled, cleaned, and rebuilt using 100% upgraded heavy-duty seals, friction components, solenoids, and torque converter parts to ensure maximum durability and performance.
Drum assemblies are air checked and side play is checked to assure proper clearance. 100% of seals, oft.rings and gaskets are replaced.
100% of solenoids are checked and replaced if they do not pass duty cycle tests. Internal wiring harness are checked and replaced as necessary. Valve bodies are disassembled, cleaned, and measured for wear.
Transmissions are assembled, end plays are set and fasteners are torqued to the required specification.
Torque Converter: 100% of converters are dynamic balanced. 100% of pumps are furnaced brazed. 100% new bearings and oft.rings. 100% new springs and rollers in stator. 100% new thrust washers. 100% new friction liners in overdrive lockup converters.
100% of transmissions are dynamometer tested to ensure proper pressures and shift quality throughout the operating range. All upshifts and downshifts are checked against preset parameters. Torque converter stall speed and lockup is verified on the dyno
Product might not be available in all states due to local laws.

from

$2399.99

Each transmission undergoes rigorous dyno testing to verify precise hydraulic pressures, smooth shifting, torque converter function, and park lock operation-guaranteeing reliable, trouble-free driving.
Every transmission is fully disassembled, cleaned, and rebuilt using 100% upgraded heavy-duty seals, friction components, solenoids, and torque converter parts to ensure maximum durability and performance.
Drum assemblies are air checked and side play is checked to assure proper clearance. 100% of seals, oft.rings and gaskets are replaced.
100% of solenoids are checked and replaced if they do not pass duty cycle tests. Internal wiring harness are checked and replaced as necessary. Valve bodies are disassembled, cleaned, and measured for wear.
Transmissions are assembled, end plays are set and fasteners are torqued to the required specification.
Torque Converter: 100% of converters are dynamic balanced. 100% of pumps are furnaced brazed. 100% new bearings and oft.rings. 100% new springs and rollers in stator. 100% new thrust washers. 100% new friction liners in overdrive lockup converters.
100% of transmissions are dynamometer tested to ensure proper pressures and shift quality throughout the operating range. All upshifts and downshifts are checked against preset parameters. Torque converter stall speed and lockup is verified on the dyno
Product might not be available in all states due to local laws.

from

$2282.00

Our remanufactured transmissions have improved torque converters included with every transmission to eliminate the possibility of front seal leaks, vibration or premature bushing wear, All torque converters are tested for leaks, lock-up, concentricity & balance. Every fully remanufactured valve body, with complete system correction & recalibration kit, is tested independently & includes updated throttle valve, manual valve, 4-spool switch valve, pressure regulator valve & governor plugs for improved shifting, lubrication & performance. All wear-prone valves are restored to stringent specifications & vacuum tested to confirm proper function. Each remanufactured transmission is hot, cold, load & simulated road testing. All remanufactured transmissions are backed by the industry’s best, no-hassle nationwide warranty(limited).

Product Features:

Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
Transmissions are securely packaged in a recyclable container that will also protect your core on the return trip. Our nationwide warehouse network means speedy delivery.
All of our transmissions are Dyno tested to ensure the highest standard of trouble free service and longevity.

from

$2217.00

Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
Transmissions are securely packaged in a recyclable container that will also protect your core on the return trip. Our nationwide warehouse network means speedy delivery.
All of our transmissions are Dyno tested to ensure the highest standard of trouble free service and longevity.

from

$2200.00

Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
Transmissions are securely packaged in a recyclable container that will also protect your core on the return trip. Our nationwide warehouse network means speedy delivery.
All of our transmissions are Dyno tested to ensure the highest standard of trouble free service and longevity.

from

$2049.99

Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
Transmissions are securely packaged in a recyclable container that will also protect your core on the return trip. Our nationwide warehouse network means speedy delivery.
All of our transmissions are Dyno tested to ensure the highest standard of trouble free service and longevity.

from

$2009.99

At Shift Pro Inc, fully remanufactured transmissions go beyond the name. So, what’s in that name to start? Pro Engineering: your transmission has been re-engineered to meet or exceed OE standards for tolerances, durability, and quality. Pro Performance: upgraded components and a fully remanufactured torque converter add to enhanced durability over your transmission’s lifetime. Pro Performance: hot-, cold-, load-, and simulated road-tested on custom dynamometers, your transmission is ready to go, wherever you’re headed.

Product Features:

Fully tested torque converter included. Shift Pro Inc tests for leaks, lock-up, concentricity, and balance to eliminate the possibilities of front seal leaks, premature bushing wear, and vibration.
All dynamometer testing is conducted with Shift Pro Inc’s custom testing program for at least 30 minutes.
During dynamometer testing, Shift Pro Inc transmissions are cold, hot, load, and road tested using a fully synthetic transmission fluid and filtration system.
All wear-prone valves in the completely remanufactured valve body are restored to stringent specifications and vacuum tested to verify proper function.
Shift Pro Inc’s quality control process includes build specification checks performed by four different specialized technicians during the remanufacturing process.
No paperwork or registration is required with Shift Pro Inc’s warranty. Each no-hassle warranty is attached to the vehicle VIN and transferrable with ownership.
Product might not be available in all states due to local laws.

from

$1995.99

Each transmission undergoes rigorous dyno testing to verify precise hydraulic pressures, smooth shifting, torque converter function, and park lock operation-guaranteeing reliable, trouble-free driving.
Every transmission is fully disassembled, cleaned, and rebuilt using 100% upgraded heavy-duty seals, friction components, solenoids, and torque converter parts to ensure maximum durability and performance.
Drum assemblies are air checked and side play is checked to assure proper clearance. 100% of seals, oft.rings and gaskets are replaced.
100% of solenoids are checked and replaced if they do not pass duty cycle tests. Internal wiring harness are checked and replaced as necessary. Valve bodies are disassembled, cleaned, and measured for wear.
Transmissions are assembled, end plays are set and fasteners are torqued to the required specification.
Torque Converter: 100% of converters are dynamic balanced. 100% of pumps are furnaced brazed. 100% new bearings and oft.rings. 100% new springs and rollers in stator. 100% new thrust washers. 100% new friction liners in overdrive lockup converters.
100% of transmissions are dynamometer tested to ensure proper pressures and shift quality throughout the operating range. All upshifts and downshifts are checked against preset parameters. Torque converter stall speed and lockup is verified on the dyno
Product might not be available in all states due to local laws.

from

$1995.99

Each transmission undergoes rigorous dyno testing to verify precise hydraulic pressures, smooth shifting, torque converter function, and park lock operation-guaranteeing reliable, trouble-free driving.
Every transmission is fully disassembled, cleaned, and rebuilt using 100% upgraded heavy-duty seals, friction components, solenoids, and torque converter parts to ensure maximum durability and performance.
Drum assemblies are air checked and side play is checked to assure proper clearance. 100% of seals, oft.rings and gaskets are replaced.
100% of solenoids are checked and replaced if they do not pass duty cycle tests. Internal wiring harness are checked and replaced as necessary. Valve bodies are disassembled, cleaned, and measured for wear.
Transmissions are assembled, end plays are set and fasteners are torqued to the required specification.
Torque Converter: 100% of converters are dynamic balanced. 100% of pumps are furnaced brazed. 100% new bearings and oft.rings. 100% new springs and rollers in stator. 100% new thrust washers. 100% new friction liners in overdrive lockup converters.
100% of transmissions are dynamometer tested to ensure proper pressures and shift quality throughout the operating range. All upshifts and downshifts are checked against preset parameters. Torque converter stall speed and lockup is verified on the dyno
Product might not be available in all states due to local laws.

from

$1977.99

Fully tested torque converter included. Shift Pro Inc tests for leaks, lock-up, concentricity, and balance to eliminate the possibilities of front seal leaks, premature bushing wear, and vibration.
All dynamometer testing is conducted with Shift Pro Inc’s custom testing program for at least 30 minutes.
During dynamometer testing, Shift Pro Inc transmissions are cold, hot, load, and road tested using a fully synthetic transmission fluid and filtration system.
All wear-prone valves in the completely remanufactured valve body are restored to stringent specifications and vacuum tested to verify proper function.
Shift Pro Inc’s quality control process includes build specification checks performed by four different specialized technicians during the remanufacturing process.
No paperwork or registration is required with Shift Pro Inc’s warranty. Each no-hassle warranty is attached to the vehicle VIN and transferrable with ownership.
Product might not be available in all states due to local laws.

from

$1977.99

Fully tested torque converter included. Shift Pro Inc tests for leaks, lock-up, concentricity, and balance to eliminate the possibilities of front seal leaks, premature bushing wear, and vibration.
All dynamometer testing is conducted with Shift Pro Inc’s custom testing program for at least 30 minutes.
During dynamometer testing, Shift Pro Inc transmissions are cold, hot, load, and road tested using a fully synthetic transmission fluid and filtration system.
All wear-prone valves in the completely remanufactured valve body are restored to stringent specifications and vacuum tested to verify proper function.
Shift Pro Inc’s quality control process includes build specification checks performed by four different specialized technicians during the remanufacturing process.
No paperwork or registration is required with Shift Pro Inc’s warranty. Each no-hassle warranty is attached to the vehicle VIN and transferrable with ownership.
Product might not be available in all states due to local laws.

from

$1977.99

Fully tested torque converter included. Shift Pro Inc tests for leaks, lock-up, concentricity, and balance to eliminate the possibilities of front seal leaks, premature bushing wear, and vibration.
All dynamometer testing is conducted with Shift Pro Inc’s custom testing program for at least 30 minutes.
During dynamometer testing, Shift Pro Inc transmissions are cold, hot, load, and road tested using a fully synthetic transmission fluid and filtration system.
All wear-prone valves in the completely remanufactured valve body are restored to stringent specifications and vacuum tested to verify proper function.
Shift Pro Inc’s quality control process includes build specification checks performed by four different specialized technicians during the remanufacturing process.
No paperwork or registration is required with Shift Pro Inc’s warranty. Each no-hassle warranty is attached to the vehicle VIN and transferrable with ownership.
Product might not be available in all states due to local laws.

from

$1949.99

Moveras Remanufactured Transmissions manufactures automatic transmissions for virtually every vehicle on the road; We are committed to remanufacturing transmissions to the same standards and methodologies used for OEM transmissions; Each Moveras transmission is produced in a World Class manufacturing facility; Our entire process has been developed from scratch, utilizing LEAN manufacturing principles; Our transmissions are produced in a Clean Room environment; Every transmission is built to the same exacting standards by using a precisely documented and controlled process.

Product Features:

OEM-Level Quality: Each transmission is remanufactured to meet or exceed original manufacturer specifications for seamless compatibility and superior performance
Advanced Remanufacturing Process: Each transmission is completely disassembled, and critical components are replaced or upgraded to ensure long-lasting performance
High-Quality Torque Converter: A fully remanufactured torque converter is included, tested for leaks, lock-up functionality, and balance to enhance durability and smooth operation
Precision Engineering: Each valve body is remanufactured to OEM specifications, ensuring proper hydraulic flow and consistent shift performance
Dyno Testing: All Moveras transmissions are dyno-tested under real-world driving conditions to ensure reliable, consistent performance before leaving the factory
Nationwide Limited Warranty: Every transmission comes with a comprehensive Limited Warranty, giving you confidence and peace of mind, no matter where you are on the road

from

$1831.99

OEM-Level Quality: Each transmission is remanufactured to meet or exceed original manufacturer specifications for seamless compatibility and superior performance
Advanced Remanufacturing Process: Each transmission is completely disassembled, and critical components are replaced or upgraded to ensure long-lasting performance
High-Quality Torque Converter: A fully remanufactured torque converter is included, tested for leaks, lock-up functionality, and balance to enhance durability and smooth operation
Precision Engineering: Each valve body is remanufactured to OEM specifications, ensuring proper hydraulic flow and consistent shift performance
Dyno Testing: All Moveras transmissions are dyno-tested under real-world driving conditions to ensure reliable, consistent performance before leaving the factory
Nationwide Limited Warranty: Every transmission comes with a comprehensive Limited Warranty, giving you confidence and peace of mind, no matter where you are on the road

Top-Rated Transmission Parts Brands For Your 2003 Chevrolet Trailblazer Ext

Shop for the best-rated brands offering Transmission Parts and other products for your 2003 Chevrolet Trailblazer Exts. Below you’ll find some of our best rated Transmission Parts from National, Dorman, and Imperial, and more. Transmission Parts from these brands that fit a 2003 Trailblazer Ext start at just $6.99 and are rated as high as 4.3 stars. OEM and aftermarket Transmission Parts don’t get more top quality, durable, and affordable than from the brands below.

Popular National 2003 Chevrolet Trailblazer Ext Transmission Parts

When it comes to maintaining or upgrading your 2003 Chevrolet Trailblazer Ext, using quality Transmission Parts is essential to ensure durability and a perfect fit. National ticks all of those boxes. We offer a wide selection of National Transmission Parts, specifically designed for the 2003 Chevrolet Trailblazer Ext. With over 3 National brand Transmission Parts in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $6.99, with an average price of just $12.99. Plus, with over 22 customer reviews and an average rating of 4.3 stars, you can trust that our National Transmission Parts will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.

from $6.99

(5)

Multi-Purpose Seal

“Awesome”

from $18.99

(4)

Multi-Purpose Seal

“great item”

from $12.99

(13)

Multi-Purpose Seal

“Fixed my leak”

Popular Dorman 2003 Chevrolet Trailblazer Ext Transmission Parts

Dorman auto parts is one of the highest quality Transmission Part brands in the market. Any 2003 Chevrolet Trailblazer Ext owner should feel confident when installing genuine Dorman parts in their vehicle. To ensure the best fit and performance for your 2003 Trailblazer Ext, Advance Auto Parts carries a full inventory of 3 Dorman Transmission Parts. Plus you will be keeping your Chevrolet in peak condition while saving money because prices on these Dorman Transmission Parts range from $8.99 to $41.99, plus, with more than 12 customer reviews and an impressive 4.2 stars average rating, you can be confident the Fram Transmission Parts below will deliver on both quality and value.

from $31.99

(3)

Transmission Oil Cooler Line: Exact Fit, Metal

“All bends were the same as OEM, worked great so far but had to use OEM clips on radiator and transmission connections. The Dorman’s would not lock in ”

from $41.99

(4)

Transmission Oil Cooler Line: Exact Fit, Metal

“Fits Chevy trailblazer.”

from $8.99

(5)

Transmission Line Connector – 3/8 in OD Tube x 9/16-18 UNF Thread

“Put on my 2004 silverado”

FAQs for 2003 Chevrolet Trailblazer Ext Transmission Parts

Which Transmission Parts are best-sellers for 2003 Chevrolet Trailblazer Exts?

Out of 127 Transmission Parts that fit 2003 Chevrolet Trailblazer Exts, the following parts are the top sellers:

Mounting Kit System (6014844) – $11.99
High Performance Transmission Oil Cooler (3670013) – $79.99
Taper Bearing Set (5050626) – $11.49

What’s the price range for 2003 Chevrolet Trailblazer Ext Transmission Parts?

Transmission Part prices for the 2003 Chevrolet Trailblazer Ext start at $3.99 and go up to $4,715.99 for the most premium parts.

What’s the average price of a Transmission Part for a 2003 Chevrolet Trailblazer Ext?

The average price for Transmission Parts for the 2003 Chevrolet Trailblazer Ext is $347.15. Keep in mind the variety of part types within our Transmission Part category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Transmission Parts for other Chevrolet Trailblazer Ext model years?

Yes, we currently carry Transmission Parts for 3 model years of Chevrolet Trailblazer Exts between 2002 and 2006. Transmission Parts are bought most frequently for the following model years: 2006, 2005, 2004, and 2002.

What are the cheapest Transmission Parts for my 2003 Chevrolet Trailblazer Ext?

The cheapest 2003 Chevrolet Trailblazer Ext Transmission Parts we carry in stock are:

Oil Seal (5440149) – $3.99
Oil Seal (15440117) – $4.99
Multi-Purpose Seal (18444499) – $6.99
Multi Purpose Seal (3271471) – $6.99
Bearing Race (3277119) – $7.99

What are the top-rated Transmission Parts that fit the 2003 Chevrolet Trailblazer Ext?

Out of 2,826 reviews by customers, our 2003 Chevrolet Trailblazer Ext Transmission Parts have an average customer rating of . These are some of the highest-rated Transmission Part types for the 2003 Chevrolet Trailblazer Ext and their top-rated products:

Back Up Neutral Safety Parts
- A/C Auto Temperature Control Relay (11271306) – $18.99
Transmission Connectors
- A/C Auto Temperature Control Relay (11271306) – $18.99
Automatic Transmission Pan and Gaskets
- A/C Auto Temperature Control Relay (11271306) – $18.99

What types of Transmission Parts do you sell for my 2003 Chevrolet Trailblazer Ext?

As of 3/1/26, these are some of the most in-demand types of Transmission Parts for a 2003 Chevrolet Trailblazer Ext:

Can I get help with 2003 Chevrolet Trailblazer Ext Transmission Part orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Chevrolet Transmission Parts and more.

What is your return policy for Chevrolet Trailblazer Ext Transmission Parts?

Advance Auto Parts keeps returns simple. For new Chevrolet Trailblazer Ext Transmission Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

2003 Chevrolet Trailblazer Ext Transmission Parts

National – Multi Purpose Seal (Part No.710506)

Driveworks – Taper Bearing Set (Part No.S-A-36)

Dorman – Transmission Oil Cooler Line: Exact Fit, Metal (Part No.624-955)

ATP – Shift Solenoid (Part No.CE-14)

Driveworks – Taper Bearing Cone (Part No.S-M-88048)

Hooker BlackHeart – Hooker BlackHeart Polyurethane Transmission Mount – Black (Part No.71223029HKR)

Pro-King – Automatic Transmission Solenoid (Part No.52-0214)

National – Tapered Roller Bearing Cone (Part No.M802048)

B & M – Automatic Shifter, Quicksilver 4 Speed (Part No.80683)

GM Genuine Parts – Gray Multi-Purpose Pigtail (Part No.PT1798)

National – Multi-Purpose Seal (Part No.4583)

Carquest – Multi-Purpose Relay (Part No.83A1008)

ATP – AT PRESS SW MANIFOLD (Part No.JE-9)

Carquest Premium – Repair Harness (Part No.PTC1522)

Imperial – Econo-Kool Transmission Oil Cooler (Part No.242012)

Driveworks – Auto Transmission Output Shaft Seal (Part No.S-4934)

ATP – ATHARNESS VSS REPR (Part No.CE-9)

National – Multi-Purpose Seal (Part No.4934)

Dorman – Anti-Lock Braking System Wheel Speed Sensor (Part No.695-982)

Dorman – Drain Plug – M12-1.75 Pilot Point (Part No.65416)

Mr. Gasket – Automatic Transmission Oil Pan Gasket (Part No.8695)

Carquest Premium – Multi-Use Connector (Part No.PTA1121)

Hays – Converter: 4L60E 32-3600 Stall (Part No.97-1G32Q)

National – Bearing Race (Part No.M88010)

National – Multi-Purpose Seal (Part No.710688)

Carquest Premium – Multi-Use Connector (Part No.PTA1184)

Dorman – Help – Torque Convertor Bolts (Part No.14099)

National – Multi Purpose Seal (Part No.8792S)

Dorman – Transmission Oil Cooler Line: Exact Fit, Metal (Part No.624-956)

Dorman – Transmission Oil Cooler Line: Exact Fit, Metal (Part No.624-954)

Imperial – High Performance Transmission Oil Cooler (Part No.240516)

Dorman – Transmission Oil Cooler Line: Exact Fit, Metal (Part No.624-955)

Imperial – Maxi-Kool XL Transmission Oil Cooler (Part No.243007)

Imperial – Plate and Fin Style Transmission Cooler, Light Duty, 3/4" x 5-7/8" x 11" (Part No.243006)

Imperial – Mounting Kit System (Part No.226201)

Imperial – Econo-Kool Transmission Oil Cooler (Part No.242010)

Imperial – Econo-Kool Transmission Oil Cooler (Part No.242009)

Imperial – Plate and Fin Style Transmission Cooler, Heavy Duty, 3/4" x 9-1/2" x 11" (Part No.243008)

Imperial – Econo-Kool Transmission Oil Cooler (Part No.242012)

Imperial – High Performance Transmission Oil Cooler (Part No.240514)

Dorman – Transmission Oil Cooler Line: Exact Fit, Metal (Part No.624-953)

Imperial – Transmission Oil Cooler Reinstallation Kit (Part No.248002)

Imperial – High Performance Transmission Oil Cooler (Part No.240512)

National – Bearing Race (Part No.M88010)

Driveworks – Taper Bearing Set (Part No.S-A-18)

National – Tapered Roller Bearing Cone (Part No.M802048)

Driveworks – Taper Bearing Set (Part No.S-A-36)

Driveworks – Taper Bearing Cone (Part No.S-M-88048)

Driveworks – Tapered Roller Bearing (Part No.S-JL-69349)

Schaeffler – Cone (Part No.KLM603049)

National – Bearing Race (Part No.JL69310)

National – Multi-Purpose Seal (Part No.4934)

National – Multi-Purpose Seal (Part No.4583)

National – Multi-Purpose Seal (Part No.710474)

National – Multi Purpose Seal (Part No.8792S)

National – Multi Purpose Seal (Part No.710506)

Driveworks – Oil Seal (Part No.S-3227)

National – Multi-Purpose Seal (Part No.710688)

Driveworks – Auto Transmission Output Shaft Seal (Part No.S-4934)

Anchor – Transmission Mount: Rear, 1 Piece (Part No.3027)

Anchor – Transmission Mount: Rear, 1 Piece (Part No.3236)

Hooker BlackHeart – Hooker BlackHeart Polyurethane Transmission Mount – Red (Part No.71223030HKR)

Hooker BlackHeart – Hooker BlackHeart Polyurethane Transmission Mount – Black (Part No.71223029HKR)

ATP – Shift Solenoid (Part No.CE-14)

Pro-King – Automatic Transmission Solenoid (Part No.52-0214)

Pro-King – Automatic Transmission Solenoid (Part No.52-0203)

Dorman – Help – Shifter Cable Bushing Kit (OE Fix) (Part No.14057)

Dorman – Help – Shifter Cable Bushing Kit (OE Fix) (Part No.14055)

Dorman – Help – Transmission Oil Dipstick: Direct Replacement, Steel (Part No.917-301)

Carquest Premium – Automatic Transmission Control Solenoid (Part No.SBA4928)

ATP – AUTO TRANS BAND (Part No.CX-42)

ATP – ATHARNESS VSS REPR (Part No.CE-9)

ATP – ATHARNESS VSS REPR (Part No.JE-24)

Premium Drive Train – Premium Remanufactured Automatic Transmission (Part No.T4L60E4803T2)

Premium Drive Train – Premium Remanufactured Automatic Transmission (Part No.T4L60E4803T4)

Spartan – Automatic Transmission Assembly; GM RWD 4L60E 4-Speed (Part No.7204-JC)

Spartan – Automatic Transmission Assembly; GM AWD 4L60E 4-Speed (Part No.7205-JC)

Spartan – Automatic Transmission Assembly; GM AWD 4L60E 4-Speed (Part No.7205-MB)

Spartan – Automatic Transmission Assembly; GM RWD 4L60E 4-Speed (Part No.7204-MB)