GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Notice: Do NOT use any type of grease to retain parts during the assembly of this unit. Using greases other than the recommended assembly lube changes the transaxle fluid characteristics. Using greases other than the recommended assembly lube causes undesirable shift conditions and/or filter clogging. Use TRANSJELâ„¢ J 36850 or equivalent during the assembly of this unit.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Place a drain pan under the automatic transmission oil pan.

  3. Object Number: 164804  Size: SH
  4. Remove the oil pan bolts (23) from the oil pan.
  5. Notice: Ensure care is taken NOT to damage the mating surfaces of the oil pan and of the case or oil leaks may occur.

  6. Use a rubber mallet to lightly tap the oil pan or use a screwdriver to pry the oil pan loose.
  7. Remove the oil pan (24) from the automatic transmission.
  8. Remove the oil pan gasket (25).
  9. Inspect the oil pan and the filter screen for the following foreign material:
  10. • Inspect for metal particles.
    • Inspect for clutch facing material.
    • Inspect for rubber particles.
    • Inspect for engine coolant.

    Object Number: 164780  Size: SH
  11. Inspect the oil pan flange (1) for distortion.
  12. Replace the oil pan (1) if bent or distorted. Do not attempt to straighten.

  13. Object Number: 164805  Size: SH
  14. Inspect the washers on the oil pan bolts.

  15. Object Number: 164806  Size: SH
  16. Install a new bolt and washer assembly if the washer is inverted.
  17. Notice: Ensure the oil pan and the case flanges are dry and are free of any oil film or leakage may result.

  18. Use solvent to clean the case.
  19. Air dry the case.
  20. Use solvent to clean the oil pan gasket surfaces.
  21. Air dry the oil pan gasket surfaces.
  22. Ensure all traces of the old gasket material are removed.

Installation Procedure


    Object Number: 164804  Size: SH
  1. Install the oil pan gasket (25).
  2. Install the oil pan (24) to the automatic transmission.
  3. 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.

  4. Install the oil pan bolts (23).
  5. Tighten
    Tighten the oil pan bolts (23) to 14 N·m (10 lb ft).

  6. Lower the vehicle.
  7. Notice: Do NOT overfill the transaxle. The overfilling of the transaxle causes foaming, loss of fluid, shift complaints, and possible damage to the transaxle.

  8. Refill the automatic transmission with automatic transmission fluid. Refer to Transmission Fluid Check .
  9. Place the gear selector in the Park position.
  10. Start the engine.
  11. Run the engine at a slow idle. Do NOT race the engine.
  12. Inspect for automatic transmission fluid leaks. Refer to Fluid Leak Diagnosis .
  13. Remove the drain pan from under the vehicle.