GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement .

  3. Object Number: 893104  Size: SH
  4. If equipped with four-wheel drive (4WD) remove the front differential and secure to the frame. Refer to Differential Carrier Assembly Replacement .
  5. If equipped with two-wheel drive (2WD), remove the steering gear. Refer to Steering Gear Replacement .
  6. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement .

  7. Object Number: 871551  Size: SH
  8. Remove the transmission oil cooler lines from the retainer.

  9. Object Number: 901495  Size: SH
  10. Remove the transmission oil cooler line retaining bracket bolt and bracket.
  11. Remove the starter. Refer to Starter Motor Replacement .
  12. Remove the flywheel inspection cover from the left side of the transmission.

  13. Object Number: 899616  Size: SH
  14. Remove the battery cable channel bolt from the front of the oil pan.
  15. Remove the battery cable channel from the oil pan.

  16. Object Number: 871561  Size: SH
  17. Loosen the 2 upper air conditioning (A/C) compressor bracket bolts (4).
  18. Remove the 2 lower A/C compressor bracket bolts (3).

  19. Object Number: 899342  Size: SH
  20. Remove the 2 lower bellhousing bolts.

  21. Object Number: 898133  Size: SH
  22. Remove the oil pan bolts.
  23. Remove the oil pan by tilting the rear of the oil pan down to clear the transmission, pull the oil pan rearward past the front wire harness, then lower the oil pan clear of the vehicle.
  24. Important: The oil pan gasket is reusable. It is NOT necessary to remove the oil pan gasket unless damaged.


    Object Number: 384699  Size: SH

    Important: DO NOT allow foreign material to enter the oil passages of the oil pan, cap or cover the openings as required.

  25. Drill out the oil pan gasket retaining rivets (2), if required.
  26. Remove the gasket (1) from the pan.
  27. Discard the gasket and rivets.
  28. Clean and inspect the oil pan. Refer to Oil Pan Cleaning and Inspection .

Installation Procedure

Important: 

   • The alignment of the structural oil pan is critical. The rear bolt hole locations of the oil pan provide mounting points for the transmission bellhousing. To ensure the rigidity of the powertrain and correct transmission alignment, it is important that the rear of the block and the rear of the oil pan must NEVER protrude beyond the engine block and transmission bellhousing plane.
   • If replacing the oil pan gasket it is not necessary to rivet the NEW gasket to the oil pan.


    Object Number: 451897  Size: SH
  1. Apply a 5 mm (0.20 in) bead of sealant GM P/N 12378190, or equivalent 20 mm (0.80 in) long to the engine block. Apply the sealant directly onto the tabs of the front cover gasket that protrudes into the oil pan surface.

  2. Object Number: 451898  Size: SH
  3. Apply a 5 mm (0.20 in) bead of sealant GM P/N 12378190, or equivalent 20 mm (0.80 in) long to the engine block. Apply the sealant directly onto the tabs of the rear cover gasket that protrudes into the oil pan surface.

  4. Object Number: 898133  Size: SH
  5. Pre-assemble the oil pan gasket and bolts to the pan.
  6. • Install the gasket onto the pan.
    • Install the oil pan bolts to the pan and through the gasket.
  7. Install the oil pan, oil pan gasket, and bolts to the engine block as an assembly.
  8. Hand thread the oil pan bolts into the engine block until snug. Do not tighten at this time.

  9. Object Number: 899342  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.

  10. Install the 2 lower bellhousing bolts.
  11. Tighten

    1. Tighten the lower bellhousing bolts to 50 N·m (37 lb ft).
    2. Tighten the 2 rear oil pan to rear cover bolts to 12 N·m (106 lb in).
    3. Tighten the remaining oil pan bolts to 25 N·m (18 lb ft).

    Object Number: 871561  Size: SH
  12. Install the 2 lower A/C compressor bracket bolts (3).
  13. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).

  14. Tighten the 2 upper A/C compressor bracket bolts (4).
  15. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).


    Object Number: 899616  Size: SH
  16. Install the battery cable channel to the oil pan.
  17. Install the battery cable channel bolt to the oil pan.
  18. Tighten
    Tighten the bolt to 12 N·m (106 lb in).

  19. Install the flywheel inspection cover to the left side of the transmission.

  20. Object Number: 901495  Size: SH
  21. Install the starter. Refer to Starter Motor Replacement in Engine Electrical.
  22. If equipped with 4WD, install the inner axle shaft. Refer to Front Drive Axle Inner Shaft Replacement .
  23. If equipped with 2WD, install the steering gear. Refer to Steering Gear Replacement .
  24. Install the transmission oil cooler line retaining bracket and bolt.
  25. Tighten
    Tighten the bolt to 9 N·m (80 lb in).


    Object Number: 871551  Size: SH
  26. Install the transmission oil cooler lines to the retainer.
  27. Install the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement .
  28. Fill the engine with oil. Refer to Engine Oil and Oil Filter Replacement .

  29. Object Number: 893104  Size: SH
  30. If equipped with 4WD, install the front differential. Refer to Differential Carrier Assembly Replacement .
  31. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .