GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Place the shift control lever in Neutral.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  3. Object Number: 159604  Size: SH
  4. Remove the exhaust muffler to catalytic converter bolts and nuts.
  5. Support the transmission with a transmission jack.
  6. Remove the transmission crossmember to body bolts.
  7. Lower the transmission enough to provide access to the shift position switch.
  8. Remove the shift position switch shield.

  9. Object Number: 159627  Size: SH
  10. Remove the shift position switch wire harness connector (1) from the bracket (2).

  11. Object Number: 159630  Size: SH
  12. Remove the transmission range selector shaft nut.
  13. Remove the transmission range selector lever.

  14. Object Number: 159626  Size: SH
  15. Remove the shift position switch bolts (1).
  16. Remove the shift position switch (2).

Installation Procedure


    Object Number: 159626  Size: SH
  1. Install the shift position switch (2).
  2. 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.

  3. Adjust the shift position switch.
  4. Tighten
    Tighten the shift position switch bolts to 12 N·m (106 lb in).

  5. Install the shift position switch bolts (1).
  6. Install the transmission range selector lever.

  7. Object Number: 159630  Size: SH
  8. Install the transmission range selector shaft nut.

  9. Object Number: 159627  Size: SH
  10. Install the shift postion switch wire harness connector (1) to the bracket (2). Use a plastic tie strap if the connector clip is broken.
  11. Install the shift position switch shield.
  12. Raise the transmission into position.
  13. Install the transmission crossmember to body bolts.
  14. Tighten
    Tighten the transmission crossmember to body bolts to 45 N·m (33 lb ft).

  15. Remove the transmission jack.
  16. Install the exhaust muffler to catalytic converter bolts and nuts.
  17. Tighten
    Tighten the exhaust muffler to catalytic converter bolts and nuts to 40 N·m (30 lb ft).

  18. Lower the vehicle.

Switch Adjustment

  1. Apply the parking brake.
  2. Position the selector to N.
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  4. Remove the shift position switch shield.
  5. Remove the nut form the range selector lever.
  6. Disconnect the shift position switch electrical connector.
  7. Connect a multimeter (ohms scale) to terminal E and H on the shift position switch electrical connector.

  8. Object Number: 159626  Size: SH
  9. Loosen both shift position switch bolts.
  10. Rotate the shift position switch slightly in both directions to determine the range of continuity (approximately 5 degrees).

  11. Object Number: 159632  Size: SH
  12. Position the shift position switch in the middle of the continuity range.
  13. 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.

  14. Tighten the shift position switch switch bolts.
  15. Tighten
    Tighten the shift position switch bolts to 12 N·m (106 lb in).

  16. Remove the multimeter.
  17. Install the shift postion switch wire harness connector. Use a plastic tie strap if the connector clip is broken.
  18. Install the range selector lever.
  19. Tighten
    Tighten the range selector lever nut to 8 N·m (71 lb in).

  20. Install the shift position switch shield.
  21. Lower the vehicle.