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Installation Procedure

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  1. Install the upper control arm.
    2. Fig 1: Upper Control Arm, Nuts, Bolts & Adjustment Cams (25/35 Series 4WD)
    GM376756Courtesy of GENERAL MOTORS CORP.
  2. Install the upper control arm bolts (4) for the 25/35 Series 4WD.
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the upper control arm nuts and the adjustment cams (2) 25/35 Series 4WD.

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

    4. Fig 2: Upper Control Arm, Nuts, Bolts & Adjustment Cams (25/35 Series 2WD)
    GM376754Courtesy of GENERAL MOTORS CORP.
  4. Install the upper control arm bolts (4) for the 15 Series 2WD, 4WD, and 25/35 Series 2WD.
  5. Install the upper control arm nuts and the adjustment cams (2) for the 15 Series 2WD, 4WD, and 25/35 Series 2WD.

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

  6. Connect the upper control arm to the steering knuckle.
  7. Install the wheel drive shaft. Refer to Wheel Drive Shaft Replacement in Wheel Drive Shafts.
    8. Fig 3: Upper Ball Joint Retaining Nut
    GM830521Courtesy of GENERAL MOTORS CORP.
  8. Install the new nut to the upper ball joint stud.

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

    9. Fig 4: View Of Retaining Bolts For Brake Hose And Wheel Speed Sensor Brackets
    GM367084Courtesy of GENERAL MOTORS CORP.
  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. Connect the ESC link rod to the sensor, if equipped. Refer to Front Position Sensor Link Assembly Replacement - Electronic Suspension in Electronic Suspension Control.
  11. Install the tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  12. Remove the safety stands.
  13. Lower the vehicle.
  14. 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.
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