2003 Chevrolet Trailblazer Ext Differentials

Essential 2003 Chevrolet Trailblazer Ext Differentials

Dorman – Differential Positive Unit Assembly (Part No.697-909)

Differential Positive Unit Assembly

from

$819.99
Hard use and poor lubrication can wear out a limited-slip differential. Restore original performance with this replacement differential carrier assembly that includes all-new spider gears, differential pins, clutches and carrier housing.

Product Features:
  • Direct replacement – this 30 spline limited-slip differential carrier fits in place of this vehicle’s original equipment carrier.
  • 100% new – this differential carrier uses all-new components, including spider gears, diff pin, pre-load spring pack and clutch pack.
  • Ready to install – this differential carrier is shipped pre-assembled and ready to install
  • Ideal upgrade – can be used to upgrade from open differential to limited-slip in an existing differential
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National – Wheel Bearing and Seal Kit (Part No.RA-327)

Wheel Bearing and Seal Kit

from

$191.99
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:
  • Spindle bearing and seal kit
  • Includes all components required to complete the repair
  • Controlled heat treating process for lasting performance and extended bearing life
  • Industry leading coverage
  • Professional technicians know they can depend on National
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Motive Gear – Differential Spool (Part No.FS10-30)

Differential Spool

from

$187.99


Product Features:
  • FULL SPOOL GM 8.5 30 SPL ST MUST USE 2-LM102911 & 2-LM102949
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National – Bearings (Part No.M86610)

Bearings

from

$9.49
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
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ACDelco – Pinion Seal (Part No.J7010204339ACD)

Pinion Seal

from

$50.45
Pinion Seal

Motive Gear – Differential Carrier Shim Kit (Part No.1101)

Differential Carrier Shim Kit

from

$8.49
High-quality Differential Carrier Shim Kit

Product Features:
  • CARRIER SHIMS 12 BOLT GM CAR & TRUCK ALSO GM8.6″ 99-ON
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Felpro – Differential Cover Gasket (Part No.RDS 55028-1)

Differential Cover Gasket

from

$9.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Unsurpassed quality you can trust
  • Validated for fit, form and function
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
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Dorman – Help – Pinion Crush Sleeves (Part No.81057)

Pinion Crush Sleeves

from

$5.29
This differential crush sleeve is designed to match the fit and function of the original sleeve on specified vehicles, and is engineered for durability and reliable performance.

Product Features:
  • Direct replacement – this differential crush sleeve is designed to match the fit and function of the original sleeve on specified vehicles.
  • Required replacement – when servicing the differential
  • 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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Dorman – Front Axle Shaft Assembly (Part No.630-417)

Front Axle Shaft Assembly

from

$357.99
Axle shaft damaged or bearings worn out? This axle shaft assembly directly replaces the original equipment on certain vehicles, ready for install right out of the box.

Product Features:
  • Direct replacement – this axle shaft assembly replaces the original equipment on specific vehicle years, makes and models
  • Ready to install – comes pre-assembled for simple installation with no further assembly required
  • Durable construction – designed to rigorous standards and tested to ensure performance
  • Trustworthy solution – backed by team of engineers and quality control specialists in the United States
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Motive Gear – Ring Gear Bolt (Part No.14066913)

Ring Gear Bolt

from

$2.49


Product Features:
  • RING GEAR BOLT 8.5″ 7.5″ 7/16 X 20 LEFT HAND
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Yukon Gear – Redline Synthetic "Shock Proof" Oil With Positraction Additive – 4 Quarts (Part No.15005)

Redline Synthetic "Shock Proof" Oil With Positraction Additive - 4 Quarts

from

$148.99
Redline Synthetic “Shock Proof” Oil with positraction Additive. 4 Quarts.

Product Features:
  • Includes four quarts of Redline Shockproof oil and one 4oz bottle of Yukon positraction additive
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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

National – Shaft Repair Sleeve (Part No.99139)

Shaft Repair Sleeve

from

$39.99
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:
  • Designed to repair damaged, grooved or worn shafts
  • Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
  • Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
  • Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
  • Easy to install with removable flange and installation tool
  • Installation tool reduces sleeve distortion and allows for installation without removal from the shaft
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Motive Gear – Differential Pinion Shim Kit (Part No.1100)

Differential Pinion Shim Kit

from

$7.49
High-quality Differential Component Shim

Product Features:
  • SHIM KIT FITS-8.25-F7.5-AMC20-GM0
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Felpro – Differential Cover Gasket (Part No.RDS 55479)

Differential Cover Gasket

from

$41.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Unsurpassed quality you can trust
  • Validated for fit, form and function
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
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Dorman – 4 Wheel Drive Oil Seal (Part No.600-605)

4 Wheel Drive Oil Seal

from

$21.99
This axle differential seal is designed to match the fit and function of the original seal on specified vehicles, and is engineered for durability and reliable performance.

Product Features:
  • Direct replacement – this axle differential seal is designed to match the fit and function of the original seal on specified vehicles.
  • Restores functionality – this seal is made to fit and fully restore part functionality after the original seal fails.
  • 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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Driveworks – Camshaft Seal (Part No.S-99139)

Camshaft Seal

from

$23.99
Product Features:
  • Brand may vary by location
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ACDelco – Axle Differential Be (Part No.K4011415668ACD)

Axle Differential Be

from

$115.84
Axle Differential Be

GM Genuine Parts – Side Differential Bearing (Part No.S1380)

Side Differential Bearing

from

$89.99
GM Genuine Parts Differential Bearings are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These bearings are low friction rotating elements that support the drive axle differential carrier within the axle or final drive housing. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:
  • Low friction rotating elements that support the drive axle differential carrier within the axle or final drive housing
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Genuine 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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Motive Gear – Differential Ring and Pinion (Part No.GM10-456A)

Differential Ring and Pinion

from

$175.99


Product Features:
  • GM 10BL 8.5 R/P 4.56A MG FRT/REAR
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Yukon Gear – High Performance Ring & Pinion Gear Set For GM 8.5" & 8.6" In A 4.88 Ratio (Part No.24162)

High Performance Ring & Pinion Gear Set For GM 8.5" & 8.6" In A 4.88 Ratio

from

$389.99
Yukon Ring & Pinion sets give you the confidence of knowing you’re running gears designed for the harshest of conditions. Whether it’s on the street, off-road, or at the track; Yukon ring & pinion sets deliver unrivaled performance & quality. Yukon uses the latest designs and manufacturing technologies to provide a quiet running gear that is strong and easy to set up. All Yukon ring & pinion sets come standard with a one-year warranty. This gear set does not have an ABS provision on the pinion.

Product Features:
  • Fits GM 8.5″ and 8.6″
  • 8.50″ ring gear diameter
  • 30 spline pinion
  • 10 ring gear bolts
  • 4.88 ratio
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Dorman – Differential Ring And Pinion Set (Part No.697-300)

Differential Ring And Pinion Set

from

$301.99
This differential ring and pinion directly replaces the original equipment on specific vehicle years, makes and models.

Product Features:
  • Direct replacement – this ring and pinion set matches the fit and function of the original components on certain vehicle applications.
  • Effective fix – eliminates grinding and whining from failed original bearings.
  • Thoroughly tested – vehicle try-on testing and rigorous quality control measures ensure longevity
  • Trustworthy quality – backed by team of designers and engineers in the United States
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Motive Gear – Differential Carrier (Part No.GM8.6L)

Differential Carrier

from

$221.99
Motive Gear offers some of the toughest drive train components on the market today. If you are looking for the largest line of performance ring and pinion gear options available with gear sets in a wide range of ratios for nearly every application, both o
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Dorman – Help – Differential Shaft Lock Bolt (Part No.81048)

Differential Shaft Lock Bolt

from

$5.99
This differential pinion shaft lock bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:
  • Direct replacement – this differential pinion shaft lock bolt matches the fit and function of the factory part on specified years, makes and models.
  • Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed 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
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2003 Chevrolet Trailblazer Ext Differentials

Maybe you’re in the middle of a full rebuild of that 2003 Chevrolet Trailblazer Ext. Maybe you just need a couple of Differentials. Either way, Advance Auto Parts has 86 different Differentials in our inventory ranging from $2.49 to $819.99. That means you can find the exact parts or products you need to keep that 2003 Chevrolet Trailblazer Ext running smoothly.

Differentials are only as good as their brand. We stock 17 different brands to make sure you have plenty of trusted parts to choose from for your 2003 Chevrolet Trailblazer Ext. Valvoline, Royal Purple, and FELPRO are just some of the brands we stock. Search for brands you know or compare prices and reviews to help you decide!

We know you’ll find the perfect Differentials for your 2003 Chevrolet Trailblazer Ext, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 2,643 reviews in this category, some of the top rated parts include Transfer Case Fluid, 1 Quart with 4.7 stars and Taper Bearing Set with 4.4 stars.

So if you’re in the market for aftermarket Differentials to keep your 2003 Chevrolet Trailblazer Ext rolling for years to come, look no further. Shop online and have your products shipped direct to your door, or pick up at the nearest Advance Auto Parts location today!

Differentials Brands To Make Your 2003 Chevrolet Trailblazer Ext Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 2003 Chevrolet Trailblazer Ext demands trusted brand parts and products to keep it running. Many trusted brands of Differentials make up Advance Auto Parts’ inventory, and all are ready to help make your Trailblazer Ext the best it can be. Be sure to browse some of our top Differentials brands and parts.

Popular Pro-King Differentials

We carry Pro-King parts in our stock across Differential Axle Shafts categories, plus more. For a 2003 Chevrolet Trailblazer Ext, our most popular Pro-King Differentials include:
Rear Axle Shaft Kit
from $244.99
(1)
Rear Axle Shaft Kit
Differential Axle Shafts

Top 2003 Chevrolet Trailblazer Ext Differentials from Felpro

Felpro products are another trusted brand when it comes to Differentials for your 2003 Chevrolet Trailblazer Ext. Popular Felpro parts include:
Differential Cover Gasket
from $9.99
(195)
Differential Cover Gasket
Rear Differential Cover Gaskets
Differential Cover Gasket
from $41.99
(4)
Differential Cover Gasket
Rear Housing Cover Gaskets

FAQs for 2003 Chevrolet Trailblazer Ext Differentials

What are the most purchased Differentials for the 2003 Chevrolet Trailblazer Ext?

Out of 86 Differentials for the 2003 Chevrolet Trailblazer Ext, the most popular in our inventory are:
DEX/MERC Automatic Transmission Fluid, 1 Gallon
from $35.99
(17)
DEX/MERC Automatic Transmission Fluid, 1 Gallon
Differential Oil

What are the top-rated 2003 Chevrolet Trailblazer Ext Differentials?

Top-rated Differentials for your 2003 Chevrolet Trailblazer Ext based on customer reviews/ratings are:
Transfer Case Fluid, 1 Quart
from $14.99
(36)
Transfer Case Fluid, 1 Quart
“Did not have to use a lot”
Taper Bearing Set
from $10.79
(33)
Taper Bearing Set
“Everything worked as it should 5 stars”
Differential Carrier Gear Kit
from $231.99
(16)
Differential Carrier Gear Kit
“First set of gears were not complete. But staff reordered them, had them next day. Thanks”