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 1781 (REAR SUSPENSION SYSTEM)REPAIR INSTRUCTIONSKNUCKLE 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 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Lower Control Arm, Knuckle Bolt & Nut

Courtesy of GENERAL MOTORS CORP.

Install the knuckle to the lower control arm. Loosely install the bolt and nut.

Fig 2: Upper Control Arm, Knuckle Bolt & Nut

Courtesy of GENERAL MOTORS CORP.

Install the knuckle to the upper control arm. Loosely install the bolt and nut.

Fig 3: Removing/Installing Washer, Bolt & Nut On The Suspension Knuckle

Courtesy of GENERAL MOTORS CORP.

Install the knuckle to the toe link. Loosely install the bolt and nut.

Fig 4: Trailing Blade & Knuckle Bolts

Courtesy of GENERAL MOTORS CORP.

Install the knuckle to trailing blade. Loosely install the bolt and nut.

NOTE: Refer to Fastener Notice .

Tighten the bolts and nuts in the following sequence.
Tighten:
1. Tighten the knuckle to lower control arm bolt to 110 N.m (81 lb ft).
2. Tighten the knuckle to upper control arm bolt to 160 N.m (118 lb ft).
3. Tighten the knuckle to toe link bolt to 160 N.m (118 lb ft).
4. Tighten the knuckle to trailing blade bolts to 135 N.m (100 lb ft).
Install the wheel bearing/hub assembly. Refer to rear Wheel Bearing and Hub Replacement .
Install the tire and wheel. Refer to Tire and Wheel Removal and Installation .
Lower the vehicle.
Perform a vehicle wheel alignment. Refer to Measuring Wheel Alignment .

RENDER: 1.0x

NO RELATED

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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.