Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 898 (REAR DRIVE AXLE)REPAIR INSTRUCTIONSREAR AXLE REPLACEMENTINSTALLATION PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Installation Procedure
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure
WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
- Raise the rear drive axle to a height in order to install the rear leaf springs.
- Install the rear leaf springs. Refer to LEAF SPRING REPLACEMENT in Rear Suspension.
- Connect the vent hose to the axle housing.
- Line up the previously made marks on the propeller shaft with the marks on the pinion flange.
- Install the propeller shaft. Refer to the appropriate procedure in Propeller Shaft:
- PROPELLER SHAFT REPLACEMENT - ONE PIECE
- PROPELLER SHAFT REPLACEMENT - TWO PIECE
- Install the rear backing plates. Refer to DRUM BRAKE BACKING PLATE in Drum Brakes.
- Install the right rear park brake cable in the cable guide on the rear axle.
- Connect the park brake cables. Refer to PARK BRAKE CABLE -- REAR RWD PICKUPS in Park Brake.
- Install the rear brake drums, if equipped. Refer to DRUM BRAKE SHOE in Drum Brakes.
- Install the rear brake rotors, if equipped. Refer to BRAKE PADS -- REAR in Disc Brakes.
- Install the rear tires and wheels assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
- Fill the axle with axle lubricant. Use the proper fluid.
- Bleed the brakes system. Refer to HYDRAULIC BRAKE SYSTEM -- MANUAL BLEEDING or HYDRAULIC BRAKE SYSTEM -- PRESSURE in Hydraulic Brakes.
- Lower the vehicle.
- Test drive vehicle and check for leaks.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.