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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1557 (FRONT SUSPENSION SYSTEM)REPAIR INSTRUCTIONSUPPER CONTROL ARM 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 Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the upper control arm.
  2. Install the upper control arm bolts (4), the 25/35 series for the 4WD.
    NOTE: Refer to FASTENER NOTICE .
  3. Install the upper control arm nuts and the adjustment cams (2), the 25/35 series for the 4WD.

    Tighten 

    Tighten the nuts to 190 N.m (140 lb ft).

    Fig 1: Install Upper Control Arm Nuts, Bolts & Adjustment Cams (4WD)
    G01480076Courtesy of GENERAL MOTORS CORP.
  4. Install the upper control arm bolts (4). Use the 15-series 2WD, the 15-series 4WD, and the 25/35-series 2WD where applicable.
  5. Install the upper control arm nuts and the adjustment cams (2). Use the 15-series 2WD, the 15-series 4WD, and the 25/35-series 2WD where applicable.

    Tighten 

    Tighten the nuts to 190 N.m (140 lb ft).

    6. Fig 2: Install Upper Control Arm Nuts, Bolts & Adjustment Cams (2WD)
    G01480077Courtesy of GENERAL MOTORS CORP.
  6. Connect the upper control arm to the steering knuckle.
  7. Install the wheel drive shaft. Refer to WHEEL DRIVE SHAFT REPLACEMENT  .
  8. Install the new nut to the upper ball joint stud.

    Tighten 

    Tighten the nut to 50 N.m (37 lb ft).

  9. Install the retaining bolts for the brake hose and wheel speed sensor brackets.

    Tighten 

    Tighten the bolts to 9 N.m (80 lb in).

  10. Install the tire and wheel. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION  .
    11. Fig 3: Install Brake Hose Retaining Bolts & Wheel Speed Sensor Brackets
    G01480078Courtesy of GENERAL MOTORS CORP.
  11. Remove the safety stands.
  12. Lower the vehicle.
  13. Verify the wheel alignment. Refer to MEASURING WHEEL ALIGNMENT (WITH REAR WHEEL STEERING)  or MEASURING WHEEL ALIGNMENT (WITHOUT REAR WHEEL STEERING)  .
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.