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 572 (REAR SUSPENSION SYSTEM)REPAIR INSTRUCTIONSCOIL SPRING REPLACEMENT - AWDINSTALLATION

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Coil Spring Replacement - AWD: Installation

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

Install the jounce bumper (5) to the shock absorber (4). See Figure.
Install the spring (3). See Figure. Position the lower tip of the coil on the gap in the lower spring seat.
Use the J 45400 or equivalent, in order to compress the spring. See Figure.
Install the spring upper insulator (2). See Figure.
Install the shock absorber lower insulator (6). See Figure.
NOTE: The right rear shock mount is the mirror image of the left rear shock mount.
Install the shock absorber upper mount. Position the front stud 23.7 degrees (a) from the centerline of the lower bolt hole.

Fig 1: Positioning Shock Absorber Front Stud (AWD)
Courtesy of GENERAL MOTORS CORP.
Install the shock absorber upper insulator. See Figure.
Install the shock absorber upper insulator retainer. See Figure.
Install the upper nut.
Verify the position of the shock absorber upper mount is correct.
Remove the spring and shock absorber assembly from the J 45400 or equivalent.
NOTE: Refer to FASTENER NOTICE .
Use a wrench in order to hold the piston rod. Tighten the nut. Tighten the nut to 56 N.m (41.3 lb ft).
Install the spring and shock absorber assembly. Refer to SHOCK ABSORBER REPLACEMENT - AWD .

RENDER: 1.0x

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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.