GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Raise the vehicle. Support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the 4  front skid plate bolts.
  3. Remove the front skid plate.
  4. Place a drain pan or suitable container under the transmission cooler hoses.

  5. Object Number: 480337  Size: SH
  6. Remove the 1 bolt (2) and the cooler pipe clamp from the transmission.
  7. Remove the inlet and the outlet transmission cooler pipes from the transmission by loosening both of the flare nuts at the cooler pipe fittings.
  8. Remove the drain pan from under the vehicle.
  9. Inspect the transmission cooler pipes for kinks or other damage. Replace the cooler pipes as necessary.
  10. Inspect the cooler pipe flare nuts for damage. Replace the nuts as necessary.

Installation Procedure


    Object Number: 480337  Size: SH

    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.

  1. Install the inlet and the outlet transmission cooler pipes (1) to the transmission by threading both of the flare nuts into the cooler pipe fittings.
  2. Tighten
    Tighten the cooler pipe flare nuts to 25 N·m (18 lb ft).


    Object Number: 166745  Size: SH
  3. Install the cooler pipe clamp (2) to the transmission cooler (1) pipe bracket.
  4. Secure the cooler pipe clamp with 1 bolt.
  5. Tighten
    Tighten the cooler pipe clamp bolt to 23 N·m (17 lb ft).

  6. Lower the vehicle.