GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Notice: Broken or deteriorated mounts can cause misalignment and destruction of certain drive train components. When a single mount breaks, the remaining mounts are subjected to abnormally high stresses.


    Object Number: 775038  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the transmission mount to crossmember nut.

  3. Object Number: 772345  Size: SH
  4. Remove the transmission mount to transmission bolts.
  5. Raise the transmission just enough, in order to permit removal of the mount using a suitable transmission jack.
  6. Remove the transmission mount.

Installation Procedure


    Object Number: 772345  Size: SH
  1. Position the transmission mount.
  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 transmission mount to transmission bolts.
  4. Tighten
    Tighten the transmission mount bolts to 50 N·m (37 lb ft).

  5. Lower the transmission and remove the transmission jack.

  6. Object Number: 775038  Size: SH
  7. Install the transmission mount to crossmember nut.
  8. Tighten
    Tighten the transmission mount to crossmember nut to 40 N·m (30 lb ft).

  9. Lower the vehicle.