GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J 28467-90A Engine Support Adapters
    • J 28467-B Universal Engine Support Fixture

Removal Procedure

    Caution: Before servicing any electrical component, the ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

  1. Disconnect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Remove the engine mount struts from the engine. Refer to Engine Mount Strut Replacement and Engine Mount Strut Replacement.
  3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  4. Remove the right front tire. Refer to Wheel Removal in Tires and Wheels.
  5. Remove the right engine splash shield. Refer to Engine Splash Shield Replacement in Body Front End.
  6. Remove the torque converter cover. Refer to Torque Converter Cover Replacement in Automatic Transaxle - 4T65-E.
  7. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement.

  8. Object Number: 153591  Size: SH
  9. Remove the oil filter.
  10. Disconnect the oil level sensor wiring harness connector.
  11. Notice: Remove the oil level sensor, located in the oil pan, before the oil pan is removed. The sensor may be damaged if the oil pan is removed first.


    Object Number: 97768  Size: SH
  12. Remove the oil level sensor.
  13. Remove the three-way catalytic converter pipe from the right (rear) exhaust manifold. Refer to Catalytic Converter Replacement in Engine Exhaust.
  14. Lower the vehicle.
  15. Install the engine support fixture. Refer to Engine Support Fixture.
  16. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  17. Object Number: 277915  Size: SH
  18. Remove the AC compressor bolts. Place the compressor aside for access. Refer to Compressor Replacement in HVAC Systems with A/C Automatic or Compressor Replacement in HVAC Systems with A/C Manual.
  19. Disconnect the power steering cooler brackets from the frame.
  20. Remove the engine mount bracket bolts from the engine. Refer to Engine Mount Bracket Replacement.
  21. Remove the engine mount nuts. Refer to Engine Mount Replacement.
  22. Suitably support the frame. Loosen the left side frame bolts. Remove the right side frame bolts. Lower the frame for access. Refer to Frame Replacement in Frame and Underbody.
  23. Remove the engine mount and the engine mount bracket.

  24. Object Number: 97771  Size: SH
  25. Remove the oil pan retaining bolts.
  26. Lower the oil pan.
  27. Remove the oil pan.

  28. Object Number: 97769  Size: SH
  29. Remove the oil pan gasket.
  30. Clean the following parts:
  31. • The oil pan bolts
    • The oil pan flanges
    • The oil pan rail
    • The front cover
    • The rear main bearing cap
    • The threaded holes

Installation Procedure


    Object Number: 1341869  Size: SH
  1. Apply a continuous bead 6.35 mm (0.25 in) thick of RTV sealer GM P/N 12378521 (Canadian P/N 88901148) to the topside of the new gasket. Apply the RTV sealant directly over the gaskets sealing bead.
  2. Install the NEW oil pan gasket onto the engine.

  3. Object Number: 741054  Size: SH
  4. Apply a continuous bead 6.35 mm (0.25 in) thick of RTV sealer GM P/N 12378521 (Canadian P/N 88901148) to the bottom side of the new gasket. Apply the RTV sealant directly over the gaskets sealing bead.
  5. Notice: Install the oil level sensor, located in the oil pan, after the oil pan is installed. The sensor may be damaged if the oil level sensor is installed first.


    Object Number: 97769  Size: SH
  6. Install the oil pan gasket.

  7. Object Number: 97771  Size: SH
  8. Install the oil pan.
  9. Apply one drop of thread lock compound GM P/N 12345382 or equivalent to the cleaned oil pan bolt threads.
  10. 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.

    Important: Do not overtighten bolts or damage to the oil pan may occur, resulting in an oil leak.

  11. Install the oil pan bolts.
  12. Tighten
    Tighten the oil pan bolts to 14 N·m (125 lb in).

  13. Place the engine mount bracket in the proper position.
  14. Install new right side frame bolts. Make sure the frame is suitably supported. Install new left side frame bolts. Refer to Frame Replacement in Frame and Underbody.
  15. Lower the vehicle.
  16. Lower the engine, using the engine support fixture.
  17. Remove the universal engine support fixture.
  18. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  19. Install the engine mount bracket bolts to the engine. Refer to Engine Mount Bracket Replacement.
  20. Install the engine mount nuts. Refer to Engine Mount Replacement.

  21. Object Number: 277915  Size: SH
  22. Install the AC compressor bolts. Refer to Compressor Replacement in HVAC Systems with A/C Automatic or Compressor Replacement in HVAC Systems with A/C Manual.
  23. Connect the power steering cooler brackets to the frame.

  24. Object Number: 97768  Size: SH
  25. Install the oil level sensor.
  26. Tighten
    Tighten the oil level sensor to 20 N·m (15 lb ft).

  27. Connect the oil level sensor wiring harness connector.

  28. Object Number: 153591  Size: SH
  29. Install the new oil filter. Refer to Engine Oil and Oil Filter Replacement.
  30. Install the oil pan drain plug. Refer to Engine Oil and Oil Filter Replacement.
  31. Install the torque converter cover. Refer to Torque Converter Cover Replacement in Automatic Transaxle - 4T65-E.
  32. Install the right engine splash shield. Refer to Engine Splash Shield Replacement in Body Front End.
  33. Install the three-way catalytic converter pipe to the right (rear) exhaust manifold. Refer to Catalytic Converter Replacement in Engine Exhaust.
  34. Install the right front tire and wheel. Refer to Wheel Installation in Tires and Wheels.
  35. Lower the vehicle.
  36. Install the engine mount struts to the engine. Refer to Engine Mount Strut Replacement and Engine Mount Strut Replacement.
  37. Connect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  38. Fill the crankcase with new engine oil. Refer to Engine Oil and Oil Filter Replacement.
  39. Inspect for the proper fluid levels.
  40. Inspect for leaks.
  41. Measure the wheel alignment. Refer to Wheel Alignment Specifications in Wheel Alignment.