GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 826962  Size: SH
  1. Remove the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement .
  2. Remove the front propeller shaft. Refer to Front Propeller Shaft Replacement .
  3. Remove the rear propeller shaft. Refer to One-Piece Propeller Shaft Replacement .
  4. Drain the transfer case fluid.
  5. Remove the transmission vent hose clip from the bracket.
  6. Remove the transmission selector cable from the bracket.
  7. Disconnect the speed sensor electrical connector (4).
  8. Remove the speed sensor wire clip (3) from the bracket.
  9. Reposition the speed sensor wire.
  10. Remove the engine harness clips (5, 6) from the bracket.
  11. Remove the fuel pipe clip from the bracket.
  12. Support the transmission with a suitable jack stand.
  13. Install a suitable transmission jack under the transfer case.

  14. Object Number: 647997  Size: SH
  15. Remove the transmission mount nuts.
  16. Raise the transfer case slightly.

  17. Object Number: 702771  Size: SH
  18. Remove the transmission mount bolts (1), at the transfer case.

  19. Object Number: 648001  Size: SH
  20. Remove the transmission mount.

  21. Object Number: 652595  Size: SH
  22. Remove the crossmember bolts.
  23. Remove the crossmember.

  24. Object Number: 828574  Size: SH
  25. Remove the transfer case adapter nuts.
  26. Remove the fuel pipe bracket from the studs.
  27. Important: Pull straight back on the transfer case in order to position the transfer case so that it can be rotated parallel to the transmission.

  28. Remove the transfer case.
  29. Rotate the transfer case so that it is perpendicular to the torsion bar mounting bracket.
  30. Lower the transmission jack.
  31. Remove the gasket from the transfer case.
  32. Remove the transfer case from the transmission jack.

Installation Procedure


    Object Number: 828574  Size: SH
  1. Place the transfer case onto a suitable transmission jack.
  2. Important: When installing a new transfer case gasket, the gasket must be installed with the locating tab oriented up, and the yellow printing towards the front of the vehicle. Install the gasket without the use of any type of sealant or lubricant.

  3. Install a NEW transfer case gasket.
  4. Rotate that transfer case so that it is parallel to the torsion bar mounting bracket.
  5. Raise the transfer case into position.
  6. Rotate the transfer case so that it is aligned with the adapter.
  7. Install the transfer case.
  8. Install the fuel pipe bracket onto the studs.
  9. 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.

    Important: Ensure that the gasket is flush to the transmission prior to installing the nuts.

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


    Object Number: 652595  Size: SH
  12. Position the crossmember.
  13. Install the crossmember bolts.
  14. Tighten
    Tighten the bolts to 95 N·m (70 lb ft).


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

  16. Object Number: 702771  Size: SH
  17. Install the transmission mount bolts (1), to the transfer case.
  18. Tighten
    Tighten the bolts to 47 N·m (35 lb ft).

  19. Lower the transfer case.

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

  23. Remove the jack stand from the transmission.
  24. Remove the transmission jack from the transfer case.

  25. Object Number: 826962  Size: SH
  26. Install the fuel pipe clip to the fuel pipe bracket.
  27. Install the clips (5, 6) to the fuel pipe bracket.
  28. Position the speed sensor wire.
  29. Install the speed sensor wire clip (3) to the bracket.
  30. Connect the speed sensor electrical connector (4).
  31. Install the transmission selector cable to the bracket.
  32. Install the transmission vent hose clip to the bracket.
  33. Install the rear propeller shaft. Refer to One-Piece Propeller Shaft Replacement .
  34. Install the front propeller shaft. Refer to Front Propeller Shaft Replacement .
  35. Refill the transfer case with fluid.
  36. Install the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement .