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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Suspension >> Front Suspension >> Front Suspension System >> Repair Instructions >> Upper Control Arm Replacement (4WD) >> Installation Procedure

Installation Procedure

  1. Install the upper control arm bumper to the upper control arm.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  2. Install the upper control arm bumper retaining nut.

    Tighten 

    Tighten the upper control arm bumper retaining nut to 27 N.m (20 lb ft).

    Fig 1: Installing Upper Control Arm Bumper And Nuts From Upper Control Arm (4WD)
    G01670440Courtesy of GENERAL MOTORS CORP.
  3. Install the upper control arm to the frame.
  4. Install the upper control arm inner cams to the upper control arm retaining bolts.
    IMPORTANT: The bolt heads must be opposed inside the bracket.
  5. Install the upper control arm retaining bolts to the upper control arm.
  6. Install the upper control arm outer cams.
  7. Install the upper control arm retaining nuts.

    Tighten 

    • Tighten the nuts with the front suspension loaded.
    • Tighten the upper control arm retaining nuts to 115 N.m (85 lb ft).
      Fig 2: Installing Upper Control Arm Inner Cams To Upper Control Arm Retaining Bolts (4WD)
      G01670441Courtesy of GENERAL MOTORS CORP.
  8. Install the upper ball joint to the steering knuckle.
  9. Install the upper ball joint to the steering knuckle retaining nut.

    Tighten 

    1. 9.1. Tighten the upper ball joint retaining nut to 83 N.m (61 lb ft).
    2. 9.2. Tighten the upper ball joint retaining nut in order to align the cotter pin. Do not tighten the upper ball joint nut more than 1/6 turn.
  10. Install a new cotter pin to the upper ball joint retaining nut. Bend the pin ends against the nut.
  11. Install the shock absorber. Refer to Shock Absorber Replacement (RWD)  or Shock Absorber Replacement (4WD) .
  12. Load the torsion bar. Refer to Torsion Bar and Support Assembly Replacement .
  13. Install the tire and wheel assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
    Fig 3: Installing New Cotter Pin To Upper Ball Joint Retaining Nut (4WD)
    G01670442Courtesy of GENERAL MOTORS CORP.
  14. Lower the vehicle.
  15. Check the front wheel alignment. Refer to MEASURING WHEEL ALIGNMENT in Wheel Alignment.
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