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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1557 (FRONT SUSPENSION SYSTEM)REPAIR INSTRUCTIONSUPPER CONTROL ARM REPLACEMENTREMOVAL PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal 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. Raise and support the vehicle. Refer to JACKING AND LIFTING .
  2. Remove the tire and wheel. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION  .
  3. Remove the retaining bolt for the brake hose and the wheel speed sensor brackets.
    4. Fig 1: Remove Brake Hose Bolt & Wheel Speed Sensor Brackets
    G01480072Courtesy of GENERAL MOTORS CORP.
  4. Remove the wheel drive shaft. Refer to WHEEL DRIVE SHAFT REPLACEMENT  .
  5. Remove the nut at the upper ball joint. Discard the nut.
  6. Disconnect the upper control arm from the steering knuckle using the J 43631  and J 45851. 
    Fig 2: Removing Upper Control Arm
    G01480073Courtesy of GENERAL MOTORS CORP.
  7. Remove 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.
  8. Remove the upper control arm bolts (4) Use the 15-series 2WD, the 15-series 4WD, and the 25/35-series 2WD where applicable.
    Fig 3: Remove Upper Control Arm Nuts, Bolts & Adjustment Cams (2WD)
    G01480074Courtesy of GENERAL MOTORS CORP.
  9. Remove the upper control arm nuts and the adjustment cams (2), the 25/35 series for the 4WD.
  10. Remove the upper control arm bolts (4), the 25/35 series for the 4WD.
  11. Remove the upper control arm.
    12. Fig 4: Remove Upper Control Arm Nuts, Bolts & Adjustment Cams (4WD)
    G01480075Courtesy of GENERAL MOTORS CORP.
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.