GM Service Manual Online
For 1990-2009 cars only

Engine Front Crossmember Replacement RWD

Removal Procedure


    Object Number: 851503  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Disconnect the electrical wiring harness connectors from the engine crossmember.
  3. Remove the engine crossmember mounting bolts.
  4. Remove the engine crossmember.

Installation Procedure


    Object Number: 851503  Size: SH
  1. Install the engine crossmember.
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the engine crossmember mounting bolts and tighten to 120 N·m (89 lb ft).
  4. Connect the electrical wiring harness connectors to the engine crossmember.
  5. Lower the vehicle.

Engine Front Crossmember Replacement 4WD

Removal Procedure


    Object Number: 1199447  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Support lower control arms with safety stands.
  3. Unload the torsion bars. Refer to Torsion Bar and Support Assembly Replacement.
  4. Remove the right side differential carrier lower mounting bracket bolt and nut.

  5. Object Number: 1199441  Size: SH
  6. Remove the left side differential carrier lower mounting bracket bolt.

  7. Object Number: 1199377  Size: SH
  8. Remove the engine crossmember bolt from the left lower control arm bracket.

  9. Object Number: 851512  Size: SH
  10. Remove the engine crossmember lower mounting bolts and nuts.

  11. Object Number: 851506  Size: SH
  12. Remove the engine crossmember upper mounting bolts.
  13. Disconnect the electrical wiring harness connectors from the engine crossmember.
  14. Remove the lower control arm nuts and washers.
  15. Remove the lower control arm bolts until bolts are flush with the frame.
  16. Remove the engine crossmember.

Installation Procedure


    Object Number: 851506  Size: SH
  1. Install the engine crossmember.
  2. Install the lower control arm bolts to the through the engine crossmember and frame.
  3. Caution: Refer to Fastener Caution in the Preface section.

  4. Install the lower control arm nuts and washers and tighten the lower control arm to frame mounting nuts.
  5. •  Without 14050/12300GVW, tighten to 155 N·m (114 lb ft).
    •  With 14050/12300GVW, tighten to 120 N·m (89 lb ft) plus 175 degrees.
    •  With diesel engine, tighten to 120 N·m (89 lb ft) plus 175 degrees.
  6. Connect the electrical wiring harness connectors to the engine crossmember.
  7. Install the engine crossmember upper mounting bolts. Do not tighten.

  8. Object Number: 851512  Size: SH
  9. Install the engine crossmember lower mounting bolts and nuts and tighten to 65 N·m (48 lb ft).

  10. Object Number: 1199377  Size: SH
  11. Install the engine crossmember bolt to the left side lower control arm bracket and tighten to 25 N·m (18 lb ft).

  12. Object Number: 1199441  Size: SH
  13. Install the left side differential carrier lower mounting bracket bolt and tighten to 85 N·m (63 lb ft).

  14. Object Number: 1199447  Size: SH
  15. Install the right side differential carrier lower mounting bracket bolt and nut and tighten to 85 N·m (63 lb ft).
  16. Load the torsion bars. Refer to Torsion Bar and Support Assembly Replacement.
  17. Remove the supports from the lower control arms.
  18. Lower the vehicle.