2003 GMC Sierra 2500 HD Transmission Parts

Essential 2003 GMC Sierra 2500 HD Transmission Parts

National – Multi Purpose Seal (Part No.710623)

Multi Purpose Seal

from

$49.49
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:
  • Low swell in hydrocarbon fluids
  • Design type: spring loaded; multi-lip
  • Provides good low temperature capability
  • Temperature range: -40°F to 225°F; -40°C to 107°C
  • Delivers quality and reliable performance for every type of repair
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ATP – AT EXT HOUSING SEAL (Part No.JO-124)

AT EXT HOUSING SEAL

from

$22.99
AT EXT HOUSING SEAL

National – Bearings (Part No.B-5020)

Bearings

from

$25.49
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:
  • Premium bearing design matches OEM specifications
  • Precision manufactured using premium-grade steel for outstanding durability and performance
  • Available in both caged design and full complement
  • Industry leading coverage
  • Professional technicians know they can depend on National
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Driveworks – Auto Transmission Shift Shaft Seal (Part No.S-8792S)

Auto Transmission Shift Shaft Seal

from

$2.49
Product Features:
  • Brand may vary by location
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Shift Pro by ETE – 1000/M74 Automatic Transmission Assembly (Part No.T281210)

1000/M74 Automatic Transmission Assembly

from

$3122.99
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.
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Dorman – Help – Transmission Dipstick Tube: Direct Replacement, Steel (Part No.921-048)

Transmission Dipstick Tube: Direct Replacement, Steel

from

$57.99
This automatic transmission dipstick tube is designed to match the fit and function of the original dipstick tube on specified vehicles, and is engineered for durability and reliable performance.

Product Features:
  • Direct replacement – this automatic transmission dipstick tube is designed to match the fit and function of the original dipstick on specified vehicles
  • Restores functionality – reliable replacement for an original dipstick tube that has failed due to fatigue and corrosion
  • 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
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Pro-King – Automatic Transmission Deluxe Rebuild Kit (Part No.KS-108)

Automatic Transmission Deluxe Rebuild Kit

from

$373.99
One of the most complete rebuild kits in the automatic transmission industry today. Each Rebuild Kit contains only the highest quality parts that meet or exceed OE specifications.

Product Features:
  • Include steels, frictions, gaskets, and filter
  • Includes Band and Modulator (if applicable)
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National – Multi Purpose Seal (Part No.8792S)

Multi Purpose Seal

from

$6.99
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:
  • Low swell in hydrocarbon fluids
  • Design type: spring loaded; multi-lip
  • Provides good low temperature capability
  • Temperature range: -40°F to 225°F; -40°C to 107°C
  • Delivers quality and reliable performance for every type of repair
See More

Dorman – Transmission Oil Pan: Direct Fit, Steel, 13.5 Quart (Part No.265-810)

Transmission Oil Pan: Direct Fit, Steel, 13.5 Quart

from

$79.99
This replacement transmission oil pan is a direct replacement for a damaged original equipment transmission pan. Made of quality materials, it’s designed for reliable, leak-free service.

Product Features:
  • Ideal replacement – this transmission oil pan matches the fit and function of the original pan for a trouble-free replacement
  • Durable construction – this transmission oil pan is made of quality materials for durability and leak-free performance
  • Cost-effective solution – offers original equipment performance at competitive price
  • Quality tested – this part has undergone try-on testing to ensure a quality fit
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National – Multi Purpose Seal (Part No.340847)

Multi Purpose Seal

from

$3.49
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:
  • Low swell in hydrocarbon fluids
  • Design type: spring loaded; multi-lip
  • Provides good low temperature capability
  • Temperature range: -40°F to 225°F; -40°C to 107°C
  • Delivers quality and reliable performance for every type of repair
See More

ACDelco – Black Multi-Purpose Relay (Part No.D1780C)

Black Multi-Purpose Relay

from

$16.49
ACDelco GM Original Equipment Wiring Relays are designed, engineered, and tested to rigorous standards, and are backed by General Motors. ACDelco GM Original Equipment parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional.

Product Features:
  • Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
  • ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors.
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM regularly updates production and service part designs to integrate new materials and technologies
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Dorman – Help – Shift Lever Arm (Part No.74124)

Shift Lever Arm

from

$14.29
This automatic transmission shifter cable lever is designed to match the fit and function of the original lever on specified vehicles, and is engineered for durability and reliable performance.

Product Features:
  • Direct replacement – this automatic transmission shifter cable lever is designed to match the fit and function of the original lever
  • Restores functionality – reliable replacement for an original part that has failed due to corrosion
  • 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
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Permatex – High-Torque, High-Vibration RTV Silicone Gasket Maker, 13 OZ (Part No.82195)

High-Torque, High-Vibration RTV Silicone Gasket Maker, 13 OZ

from

$26.99
Permatex Ultra Grey is specified for high torque and high vibration applications. Ultra Grey offers a sensor-safe, low odor, non-corrosive formula and is OEM specified to fit dealership warranty requirements. This high performance gasket maker meets performance specs of OE silicone gaskets and can be used on high torque and vibration applications such as valve covers, water pump, intake manifold end seals ad thermostat housings.

Product Features:
  • High torque and rigidity
  • Sensor-safe, non-corrosive formula
  • OEM specified
  • Low-odor, non-corrosive formula
  • Ideal for closed spaced bolt patterns
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Dorman – Transmission Shift Interlock Solenoid (Part No.924-977)

Transmission Shift Interlock Solenoid

from

$29.99
This shift interlock solenoid is designed to match the fit and function of the original solenoid on specified vehicles, and is engineered for durability and reliable performance.

Product Features:
  • Direct replacement – this shift interlock solenoid is designed to match the fit and function of the original solenoid on specified vehicles
  • Ideal solution – this solenoid is a reliable replacement for an original part that is damaged or has failed due to fatigue, excessive heat or electrical current
  • Durable construction – this solenoid is made from quality components to ensure reliable performance and a long service life
  • Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
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ATP – Shift Solenoid (Part No.CE-14)

Shift Solenoid

from

$52.99
Shift Solenoid

Dorman – Transmission Oil Cooler Line (Part No.624-554)

Transmission Oil Cooler Line

from

$36.49
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 long service life
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
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Permatex – Ultra Grey RTV Gasket Maker (9.5 oz.) (Part No.85084)

Ultra Grey RTV Gasket Maker (9.5 oz.)

from

$32.99
OEM specified. Designed specially for high-torque and high vibration applications, like those common in import engines, this premium RTV gasket maker exceeds manufacturers’ performance requirements. Sensor-safe, low odor, and non-corrosive. Maximum vibration resistance, with outstanding resistance to oils, cooling and shop fluids. Temperature range -65ºF to 500ºF (-54 Deg. C to 260 Deg. C) intermittent.

Product Features:
  • Designed specially for high-torque and high vibration applications
  • Maximum vibration resistance with outstanding resistance to oils, cooling and shop fluids
  • OEM specified
  • Low-odor, non-corrosive formula
  • Temperature Range: -65 Deg. F to 500 Deg. F (-54 Deg. C to 260 Deg. C)
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SKF – AT Rear Seal (Part No.J5071366796SKF)

AT Rear Seal

from

$18.47
AT Rear Seal

ACDelco – Multi-Purpose Pigtail (Part No.PT1626)

Multi-Purpose Pigtail

from

$65.99
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
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Carquest Premium – Multi Purpose Relay (Part No.RAA1241)

Multi Purpose Relay

from

$21.99
Carquest premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.
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National – Bearings (Part No.M802048)

Bearings

from

$23.99
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:
  • Premium bearing design matches OEM specifications
  • Precision manufactured using premium-grade steel for outstanding durability and performance
  • Crowned raceways and rollers to ensure even load distribution for maximum life
  • Industry leading coverage
  • Professional technicians know they can depend on National
See More

B & M – CAST DEEP PAN (Part No.70295)

CAST DEEP PAN

from

$349.99
Add fluid capacity to your transmission. Extra fluid means more cooling, and more cooling means better efficiency and performance. Add life to your transmission with a B&M Deep Pan!

Product Features:
  • Additional Oil Capacity
  • More Cooling Ability
  • No Dipstick Modification
  • Some Include Fluid Pickup Extension
  • Built-In Drain Plugs
  • Cast Aluminum
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Dorman – Help – Shift Lever Boot (Part No.47106CD)

Shift Lever Boot

from

$28.49
This transmission shift boot matches the fit and function of the original equipment boot that as become damaged or missing. Made of quality materials, this boot is designed for durability and has been validated for a proper fit.

Product Features:
  • Ideal replacement – this transmission shift boot matches the fit and function of the original equipment boot for specific makes and models
  • Durable materials – this shift boot is manufactured from quality materials for durability
  • Cost-effective solution – offers original equipment quality at competitive price
  • Quality tested – this part has undergone try-on testing to ensure a quality fit
See More

National – Bearings (Part No.2520)

Bearings

from

$26.49
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:
  • Premium bearing design matches OEM specifications
  • Precision manufactured using premium-grade steel for outstanding durability and performance
  • Crowned raceways and rollers to ensure even load distribution for maximum life
  • Industry leading coverage
  • Professional technicians know they can depend on National
See More

National – Bearings (Part No.2580)

Bearings

from

$47.99
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:
  • Premium bearing design matches OEM specifications
  • Precision manufactured using premium-grade steel for outstanding durability and performance
  • Crowned raceways and rollers to ensure even load distribution for maximum life
  • Industry leading coverage
  • Professional technicians know they can depend on National
See More

Popular 2003 GMC Sierra 2500 HD Transmission Parts Categories

2003 GMC Sierra 2500 HD Transmission Parts

You count on your 2003 GMC Sierra 2500 HD to run right. That means taking care of it with regular maintenance, necessary repairs, and the right parts. Advance Auto Parts can help with all of that thanks to our extensive inventory of trusted Transmission Parts. With 216 Transmission Parts ranging in price from $1.99 to $3,122.99, you’re sure to find everything you need for your 2003 GMC Sierra 2500 HD.

Brands matter. If you want to shop a specific Transmission Parts brand, we stock 32 different brands like Dorman, National, and Imperial. 2003 GMC Sierra 2500 HD Transmission Parts start as low as $1.99!

One of the best ways to find top quality OEM or aftermarket Transmission Parts is by asking professionals. Short of that, you can shop with confidence thanks to our 9,392 extensive product reviews on 2003 GMC Sierra 2500 HD Transmission Parts. Some of the top-rated Transmission Parts products we carry are Maxi-Kool® XL Transmission Oil Cooler with 4.4 stars and Multi Purpose Seal with 4.4 stars.

Did we mention you can order your Transmission Parts from our online catalog and have them shipped right to your garage? Or, if you feel like seeing the parts first-hand, search for your nearest Advance Auto Parts location above and pick up in-store when you’re ready. Browse our full Transmission Parts inventory for your 2003 GMC Sierra 2500 HD below to get started!

Top-Rated Transmission Parts Brands For Your 2003 GMC Sierra 2500 HD

Trusted Transmission Parts OEM and aftermarket product brands are what Advance Auto Parts specializes in. The brands we work with are sure to keep that 2003 GMC Sierra 2500 HD running right for years to come. In our inventory you’ll find brands like Dorman, National, Imperial, and even more.

Popular ACDelco Transmission Parts

You’ll find popular ACDelco brand products across Back Up Neutral Safety Parts. All are waiting to get your 2003 GMC Sierra 2500 HD back on the road. Some of the top-rated ACDelco products in these categories are:
Black Multi-Purpose Relay
from $16.49
(2)
Black Multi-Purpose Relay
Neutral Safety Relays

Top-Rated ATP Transmission Parts


If ATP are what you’re looking for, our inventory holds plenty. We stock ATP brand Transmission Parts for your 2003 GMC Sierra 2500 HD, and some of our most reviewed ATP parts include:
Automatic Transmission Shifter Cable
from $92.99
(255)
Automatic Transmission Shifter Cable
Automatic Transmission Shifter Cable Kits
Automatic Transmission Shifter Cable
from $83.99
(13)
Automatic Transmission Shifter Cable
Transmission Shift Cables
Shift Solenoid
from $52.99
(1)
Shift Solenoid
Automatic Transmission Shift Solenoids

FAQs for 2003 GMC Sierra 2500 HD Transmission Parts

What are the most purchased Transmission Parts for the 2003 GMC Sierra 2500 HD?

Out of 216 Transmission Parts for the 2003 GMC Sierra 2500 HD, the most popular in our inventory are:
High Performance Transmission Oil Cooler
from $81.99
(48)
High Performance Transmission Oil Cooler
OE Transmission Coolers
Transmission Line Connector With 3/8 Tube X 5/8-18 In. Thread
from $6.49
(16)
Transmission Line Connector With 3/8 Tube X 5/8-18 In. Thread
Automatic Transmission Line Connectors
Transmission Mount: Rear, 1 Piece
from $23.49
(20)
Transmission Mount: Rear, 1 Piece
Transmission Mounts

What are the top-rated 2003 GMC Sierra 2500 HD Transmission Parts?

Top-rated Transmission Parts for your 2003 GMC Sierra 2500 HD based on customer reviews/ratings are:
Maxi-Kool® XL Transmission Oil Cooler
from $81.99
(31)
Maxi-Kool® XL Transmission Oil Cooler
“Great , kept my trans cool pulling a large loader”
Multi Purpose Seal
from $6.99
(20)
Multi Purpose Seal
“The product works well”
Multi Purpose Seal
from $18.99
(15)
Multi Purpose Seal
“it sealed”