GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 42055 Transmission Support Fixture

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

  4. Object Number: 180606  Size: SH
  5. Remove the rear shock absorber lower mounting bolts.
  6. Remove the transaxle mount to rear crossmember nuts.

  7. Object Number: 180637  Size: SH
  8. Assemble the J 42055 .
  9. Install the J 42055 to a transmission jack.
  10. Position and firmly secure the J 42055 with the transmission jack to the transmission.
  11. Position a transmission jack under the rear suspension crossmember and firmly secure the crossmember to the jack.
  12. Using ONLY HAND TOOLS, remove the rear suspension crossmember retaining nuts.
  13. Carefully lower the rear crossmember approximately 37 mm (1.5 in).
  14. Remove the transaxle mount to differential bolts for the appropriate mount that will be replaced.
  15. Remove the appropriate transaxle mount from the vehicle.

Installation Procedure

  1. Install the transaxle mount to the vehicle.
  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. Install the transaxle mount to differential bolts.
  4. Tighten
    Tighten the transaxle mount bracket to differential bolts to 50 N·m (37 lb ft).


    Object Number: 180637  Size: SH
  5. SLOWLY raise the rear suspension crossmember (still firmly attached to a transmission jack), to the vehicle frame rails.
  6. Guide the transaxle mount studs into the slots in the rear crossmember.

  7. Using ONLY HAND TOOLS, install NEW rear suspension crossmember mounting nuts.
  8. Tighten
    Tighten the rear suspension crossmember mounting nuts to 110 N·m (81 lb ft).

  9. Remove the transmission jack from the rear suspension crossmember.
  10. Release the J 42055 from the transmission, then remove the J 42055 and transmission jack.
  11. Install the transaxle mount to rear suspension crossmember nuts.
  12. Tighten
    Tighten the transaxle mount to rear suspension crossmember nuts to 50 N·m (37 lb ft).


    Object Number: 180606  Size: SH
  13. Install the rear shock absorber lower mounting bolts.
  14. Tighten
    Tighten the rear shock absorber lower mounting bolts to 220 N·m (162 lb ft).

  15. Install the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  16. Lower the vehicle.
  17. Connect the negative battery cable.
  18. Tighten
    Tighten the negative battery cable bolt to 15 N·m (11 lb ft).

  19. Program the transmitters. Refer to Transmitter Programming in Keyless Entry.