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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> Suspension >> Front Suspension >> Front Suspension System >> Repair Instructions >> Lower Control Arm Replacement (AWD) >> Installation Procedure

Installation Procedure

  1. Install the lower control arm brace to the lower control arm.

    Important:  Install the front leg of the lower control arm to the crossmember before installing the rear leg to the frame bracket.

  2. Install the lower control arm to the crossmember and frame bracket.
    Fig 1: Installing Lower Control Arm To Crossmember And Frame Bracket
    G01646288Courtesy of GENERAL MOTORS CORP.
  3. Install the lower control arm bolts in the proper direction.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.

    Important:  Tighten the nuts with the control arm at Z  height. Refer to TRIM HEIGHT INSPECTION PROCEDURE in Suspension General Diagnosis.

  4. Install the new nuts and the washers.

    Tighten 

    1. 4.1. Tighten the lower control arm nuts and bolts with the front suspension loaded.
    2. 4.2. Tighten the lower control arm front mounting nuts to 133 N.m (98 lb ft).
    3. 4.3. Tighten the lower control arm rear mounting nuts to 133 N.m (98 lb ft).
  5. Install the steering knuckle and the wheel hub and bearing to the lower ball joint.
    Fig 2: Installing Steering Knuckle To Lower Ball Joint
    G01646289Courtesy of GENERAL MOTORS CORP.
  6. Install the lower ball joint retaining nut.
  7. Connect the upper ball joint to the steering knuckle.
  8. Install the upper ball joint retaining nut.

    Tighten 

    • Tighten the upper ball joint retaining nut to 98 N.m (72 lb ft).
    • Tighten the lower ball joint retaining nut to 128 N.m (95 lb ft).
  9. Install new cotter pins to the upper and lower ball joints. Tighten the nut up to an additional 1/6 amount in order to insert the cotter pin through the upper and lower ball joint studs. Bends the cotter pin ends flat against the nut.
  10. Connect the wheel speed sensor wiring harness clips to the upper control arm.
  11. Install the wheel speed sensor wiring harness bracket retaining bolts at the steering knuckle and the frame.
  12. Connect the wheel speed sensor electrical connector.
  13. Connect the outer tie rod to the steering knuckle.
    Fig 3: Connecting Outer Tie Rod To Steering Knuckle
    G01646290Courtesy of GENERAL MOTORS CORP.
  14. Install the outer tie rod retaining nut and cotter pin.

    Tighten 

    Tighten the outer tie rod retaining nut to 49 N.m (36 lb ft).

  15. Install the wheel drive shaft washer and the retaining nut to the wheel hub and bearing.

    Tighten 

    Tighten the wheel drive shaft retaining nut to 235 N.m (173 lb. ft.).

    Fig 4: Installing Wheel Drive Shaft Washer And Retaining Nut
    G01646291Courtesy of GENERAL MOTORS CORP.
  16. Install the rotor. Refer to BRAKE ROTOR (FRONT) in Disc Brakes.
  17. Install the shock absorber lower mounting bolt.

    Tighten 

    Tighten the lower shock mounting bolt to 62 N.m (42 lb ft).

    Fig 5: Installing Shock Absorber Lower Mounting Bolt
    G01646292Courtesy of GENERAL MOTORS CORP.
  18. Install the stabilizer shaft link. Refer to STABILIZER SHAFT LINK REPLACEMENT (RWD)  or STABILIZER SHAFT LINK REPLACEMENT (AWD)  .
  19. Install the torsion bar. Refer to Torsion Bar Replacement . 
  20. Install the tire and wheel. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
  21. Lower the vehicle.
  22. Check the front wheel alignment. Refer to MEASURING WHEEL ALIGNMENT in Wheel Alignment.
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