GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Important: In order to avoid oil pan damage and possible engine failure, insert a block of wood that spans the width of the oil pan bottom between the oil pan and the jack support.

  1. Use a jack or a utility stand to raise the transmission/transaxle in order to remove the weight from the transmission/transaxle mount and create slight tension in the mount.
  2. Inspect the transmission/transaxle mount. Replace the transmission/transaxle mount if the transmission/transaxle mount exhibits any of the following conditions:
  3.    • The rubber surface is covered with cracks.
       • The rubber is separated from the metal plate of the mount.
       • The rubber is split through the center.
  4. If there is movement between the metal plate of the transmission/transaxle mount and the transmission, tighten the transmission mount fasteners to the correct tightening specification.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the left front wheel and tire assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  3. Remove the left front fender liner. Refer to Front Fender Liner Replacement in Body Front End.

  4. Object Number: 414963  Size: SH
  5. Install a jackstand and a block of wood to support the transaxle.

  6. Object Number: 511024  Size: SH
  7. Remove the expansion bolt from the transmission mount.

  8. Object Number: 510427  Size: SH
  9. Remove the transmission mount bolts.
  10. Remove the mount.

Installation Procedure

  1. Transfer the mount bracket to the new mount.

  2. Object Number: 510427  Size: SH
  3. Position the mount and start the bolts into the threads.
  4. 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.

  5. Tighten the mount bolts.
  6. Tighten
    Tighten the bolts to 66 N·m (41 lb ft).


    Object Number: 511024  Size: SH
  7. Install the mount expansion bolt.
  8. Tighten
    Tighten the bolt to 55 N·m (41 lb ft).


    Object Number: 414963  Size: SH
  9. Remove the jackstand and the wood block.
  10. Install the left fender liner. Refer to Front Fender Liner Replacement in Body Front End.
  11. Install the left tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  12. Lower the vehicle.