GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 829842  Size: SH
  1. Remove the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement .
  2. Drain the transfer case fluid.
  3. Remove the front propeller shaft. Refer to Front Propeller Shaft Replacement in Propeller Shaft.
  4. Remove the rear propeller shaft. Refer to Rear Propeller Shaft Replacement in Propeller Shaft.
  5. Remove the vent hose (2) from the transfer case fitting (1).
  6. Reposition the vent hose out of the way.

  7. Object Number: 856630  Size: SH
  8. Remove the harness inline to engine harness connector clip from the fuel feed and return pipe bracket.
  9. Disconnect the encoder motor electrical connector (2).
  10. Disconnect the speed sensor electrical connectors (1).
  11. Remove the harness clips from the transfer case.
  12. Reposition the harness out of the way.
  13. Important: Ensure that the transfer case is correctly secured to the transmission jack.

  14. Support the transmission and transfer case with suitable transmission jacks.

  15. Object Number: 647997  Size: SH
  16. Remove the transmission mount nuts.

  17. Object Number: 652595  Size: SH
  18. Remove the crossmember bolts.
  19. Remove the crossmember.

  20. Object Number: 715661  Size: SH
  21. Remove the transmission mount bolts.

  22. Object Number: 648001  Size: SH
  23. Remove the transmission mount.

  24. Object Number: 828574  Size: SH
  25. Remove the transfer case adapter nuts.
  26. Remove the fuel feed and return pipe bracket.
  27. Separate the transfer case from the transmission by moving the transfer case straight back toward the rear of the vehicle.
  28. Rotate the transfer case so that the transfer case is perpendicular to the transmission.
  29. Lower the transfer case.

Installation Procedure


    Object Number: 828574  Size: SH
  1. Rotate the transfer case so that the transfer case is perpendicular to the transmission.
  2. Raise the transfer case into position.
  3. Rotate the transfer case so that the transfer case aligns with the transfer case adapter.
  4. Install the transfer case.
  5. Install the fuel feed and return pipe bracket.
  6. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  7. Install the transfer case adapter nuts.
  8. Tighten
    Tighten the nuts to 50 N·m (37 lb ft).


    Object Number: 648001  Size: SH
  9. Install the transmission mount.

  10. Object Number: 715661  Size: SH
  11. Install the transmission mount bolts.
  12. Tighten
    Tighten the bolts to 47 N·m (35 lb ft).


    Object Number: 652595  Size: SH
  13. Install the crossmember.
  14. Install the crossmember bolts.
  15. Tighten
    Tighten the bolts to 70 N·m (52 lb ft).


    Object Number: 647997  Size: SH
  16. Install the transmission mount nuts.
  17. Tighten
    Tighten the nuts to 40 N·m (30 lb ft).

  18. Remove the transmission jacks from the transmission and transfer case.

  19. Object Number: 856630  Size: SH
  20. Position the harness to the transfer case.
  21. Install the harness clips to the transfer case.
  22. Connect the speed sensor electrical connectors (1).
  23. Connect the encoder motor electrical connector (2).
  24. Install the harness inline to engine harness connector clip to the fuel feed and return pipe bracket.

  25. Object Number: 829842  Size: SH
  26. Position the vent hose to the transfer case.
  27. Install the vent hose (2) to the transfer case fitting (1).
  28. Install the rear propeller shaft. Refer to Rear Propeller Shaft Replacement in Propeller Shaft.
  29. Install the front propeller shaft. Refer to Front Propeller Shaft Replacement in Propeller Shaft.
  30. Fill the transfer case with fluid.
  31. Install the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement .