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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1038 (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 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 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.
    Fig 1: Installing The Upper Control Arm Bolts ( 25/35 Series 4WD)
    GM376756Courtesy of GENERAL MOTORS CORP.
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
  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).

  4. For the 25/35-Series 4WD, install the control arm using the following procedure:
    1. Install the upper control arm.
    2. Install the upper control arm bolts (4).
    3. Install the upper control arm nuts and adjuster cams (2).
  5. For 15-Series 2WD/4WD and 25/35 Series 2WD, install the control arm using the following procedure:
    1. Install the upper control arm.
    2. Install the upper control arm bolts (4).
    3. Install the upper control arm nuts and the adjustment cams (2).
    Fig 2: Installing The Upper Control Arm (15-Series 2WD/4WD and 25/35 Series 2WD)
    GM376754Courtesy of GENERAL MOTORS CORP.
  6. Connect the upper control arm to the steering knuckle.
  7. Install a new nut to the upper ball joint stud.

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

  8. Install the wheel drive shaft. Refer to Wheel Drive Shaft Replacement in Wheel Drive Shafts.
  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).

    Fig 3: View Of Retaining Bolts For Brake Hose And Wheel Speed Sensor Brackets
    GM367084Courtesy of GENERAL MOTORS CORP.
  10. Install the tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  11. Remove the safety stands.
  12. Lower the vehicle.
  13. Verify the wheel alignment. Refer to Measuring Wheel Alignment (w/Rear Wheel Steering) or Measuring Wheel Alignment (w/o Rear Wheel Steering) in 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.