GM Service Manual Online
For 1990-2009 cars only

Oil Pan Replacement RWD

Removal Procedure

  1. Disconnect the battery negative cable. Refer to Battery Cable Replacement in Engine Electrical.
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the oil pan drain plug and drain the engine oil into a suitable container.
  4. Remove the oil filter.

  5. Object Number: 309158  Size: SH
  6. Remove the oil pan skid plate.

  7. Object Number: 328107  Size: SH
  8. Remove the crossbar.

  9. Object Number: 310250  Size: SH
  10. Remove the bolts holding the battery cable brackets to the oil pan.
  11. Remove the starter and move aside. Refer to Starter Motor Replacement in Engine Electrical.

  12. Object Number: 391868  Size: SH
  13. Remove the transmission cover.

  14. Object Number: 327996  Size: SH
  15. Remove the bracket for the starter positive cable and the transmission cooler lines form the side of the oil pan.

  16. Object Number: 407501  Size: SH
  17. Disconnect the low oil level sensor electrical connector.

  18. Object Number: 331034  Size: SH
  19. Remove the access plugs for the oil pan rear nuts.

  20. Object Number: 31739  Size: SH
  21. Remove the following oil pan fasteners:
  22. 13.1. Remove the oil pan bolts.
    13.2. Remove the two nuts at the crankshaft rear oil seal housing.
    13.3. Remove the transmission to oil pan bolts.
  23. Remove the oil pan and the gasket. Refer to Oil Pan Removal .

  24. Object Number: 387460  Size: SH

    Important: The low oil level sensor is not reusable. Use a NEW low oil sensor.

  25. Remove the low oil level sensor, if required.
  26. Clean all sealing surfaces on the engine and the oil pan. Refer to Oil Pan Clean and Inspect .

Installation Procedure


    Object Number: 387460  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.

    Important: The low oil level sensor is not reusable. Use a NEW low oil sensor.

  1. Install a NEW low oil level sensor, if removed.
  2. Tighten
    Tighten the sensor to 20 N·m (15 lb ft).


    Object Number: 31739  Size: SH
  3. Install the oil pan. Refer to Oil Pan Installation .
  4. Install the transmission to oil pan bolts and nuts.
  5. Tighten
    Tighten the bolts to 47 N·m (35 lb ft).


    Object Number: 331034  Size: SH
  6. Install the access plugs for the oil pan rear nuts,

  7. Object Number: 327996  Size: SH
  8. Install the bracket for the starter positive cable and the transmission cooler lines to the side of the oil pan.
  9. Tighten
    Tighten the bolts to 12 N·m (106 lb in).


    Object Number: 407501  Size: SH
  10. Connect the low oil level sensor electrical connector.

  11. Object Number: 391868  Size: SH
  12. Install the transmission cover.
  13. Tighten
    Tighten the bolts to 12 N·m (106 lb in).

  14. Install the starter. Refer to Starter Motor Replacement in Engine Electrical.

  15. Object Number: 310250  Size: SH
  16. Install the bolts holding the battery cable brackets to the oil pan.
  17. Tighten
    Tighten the bolts to 12 N·m (106 lb in).


    Object Number: 328107  Size: SH
  18. Install the crossbar.
  19. Tighten
    Tighten the bolts to 100 N·m (74 lb ft).


    Object Number: 309158  Size: SH
  20. Install the oil pan skid plate.
  21. Tighten
    Tighten the bolts to 20 N·m (15 lb ft).

  22. Install the oil filter and the oil pan drain plug. Refer to Engine Oil and Oil Filter Replacement
  23. Lower the vehicle.
  24. Fill the engine with oil. Refer to Engine Oil and Oil Filter Replacement
  25. Connect the battery negative cable. Refer to Battery Cable Replacement in Engine Electrical.

Oil Pan Replacement Four Wheel Drive

Removal Procedure

  1. Disconnect the battery negative cable. Refer to Battery Cable Replacement in Engine Electrical.
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the front differential shield. Refer to Shield Replacement in Front Drive Axle.
  4. Remove the oil pan drain plug and drain the engine oil into a suitable container.
  5. Remove the oil filter.
  6. Remove the oil filter adapter. Refer to Oil Filter Adapter and Bypass Valve Assembly Replacement .

  7. Object Number: 487521  Size: SH
  8. Remove the crossbar.
  9. Remove the front differential carrier assembly. Refer to Differential Carrier Assembly Replacement in Front Drive Axle.

  10. Object Number: 310250  Size: SH
  11. Remove the bolts holding the battery cable brackets to the oil pan.
  12. Remove the starter and move aside. Refer to Starter Motor Replacement in Engine Electrical.

  13. Object Number: 391868  Size: SH
  14. Remove the transmission cover.

  15. Object Number: 327996  Size: SH
  16. Remove the bracket for the starter positive cable and the transmission cooler lines from the side of the oil pan.

  17. Object Number: 407501  Size: SH
  18. Disconnect the low oil level sensor electrical connector.

  19. Object Number: 331034  Size: SH
  20. Remove the access plugs for the oil pan rear nuts.

  21. Object Number: 31739  Size: SH
  22. Remove the following oil pan fasteners:
  23. 15.1. Remove the oil pan bolts.
    15.2. Remove the two nuts at the crankshaft rear oil seal housing.
    15.3. Remove the transmission to oil pan bolts.
  24. Remove the oil pan and the gasket. Refer to Oil Pan Removal .

  25. Object Number: 387460  Size: SH

    Important: The low oil level sensor is not reusable. Use a NEW low oil sensor.

  26. Remove the low oil level sensor, if required.
  27. Clean all sealing surfaces on the engine and the oil pan. Refer to Oil Pan Clean and Inspect .

Installation Procedure


    Object Number: 387460  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.

    Important: The low oil level sensor is not reusable. Use a NEW low oil sensor.

  1. Install a NEW low oil level sensor, if removed.
  2. Tighten
    Tighten the sensor to 20 N·m (15 lb ft).


    Object Number: 31739  Size: SH
  3. Install the oil pan. Refer to Oil Pan Installation .
  4. Install the transmission to oil pan bolts and nuts.
  5. Tighten
    Tighten the bolts to 47 N·m (35 lb ft).


    Object Number: 331034  Size: SH
  6. Install the access plugs for the oil pan rear nuts,

  7. Object Number: 327996  Size: SH
  8. Install the bracket for the starter positive cable and the transmission cooler lines to the side of the oil pan.
  9. Tighten
    Tighten the bolts to 12 N·m (106 lb in).


    Object Number: 407501  Size: SH
  10. Connect the low oil level sensor electrical connector.

  11. Object Number: 391868  Size: SH
  12. Install the transmission cover.
  13. Tighten
    Tighten the bolts to 12 N·m (106 lb in).

  14. Install the starter. Refer to Starter Motor Replacement in Engine Electrical.

  15. Object Number: 310250  Size: SH
  16. Install the bolts holding the battery cable brackets to the oil pan.
  17. Tighten
    Tighten the bolts to 12 N·m (106 lb in).


    Object Number: 487521  Size: SH
  18. Install the front differential carrier assembly. Refer to Differential Carrier Assembly Replacement in Front Drive Axle.
  19. Install the crossbar.
  20. Tighten
    Tighten the bolts to 100 N·m (74 lb ft).

  21. Install the oil filter adapter. Refer to Oil Filter Adapter and Bypass Valve Assembly Replacement .
  22. Install the oil filter and the oil pan drain plug. Refer to Engine Oil and Oil Filter Replacement
  23. Install the front differential shield. Refer to Shield Replacement in Front Drive Axle.
  24. Lower the vehicle.
  25. Fill the engine with oil. Refer to Engine Oil and Oil Filter Replacement
  26. Connect the battery negative cable. Refer to Battery Cable Replacement in Engine Electrical.