GM Service Manual Online
For 1990-2009 cars only

    Caution: 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. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Note: Before replacing any transmission/transaxle mount due to suspected fluid loss, verify that the source of the fluid is the transmission/transaxle mount, not the engine, transmission/transaxle or accessories.

  3. Raise the transmission/transaxle in order to remove the weight from the transmission/transaxle mount and create slight tension in the rubber.

  4. Object Number: 630964  Size: SH
  5. Observe the transmission/transaxle mount while raising the transmission/transaxle. Replace the transmission/transaxle mount if the transmission/transaxle mount exhibits any of the following conditions:
  6. • The hard rubber surface is covered with heat check cracks.
    • The rubber is separated from the metal plate of the transmission/transaxle mount.
    • The rubber is split through the center of the transmission/transaxle mount.
    • If the transaxle needs replaced. Refer to Transmission Mount Replacement - Left Side.
  7. If there is movement between the metal plate of the transmission/transaxle mount and its attaching points, lower the transmission/transaxle on the transmission/transaxle mount. Tighten the bolts or nuts attaching the transmission/transaxle mount to the frame or transmission/transaxle mount bracket. Refer to Transmission Mount Replacement - Left Side.
  8. Lower the vehicle.