GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 41044 Engine support Adapters
    • J 28467-B Universal engine Support Fixture

Removal Procedure

Notice: When raising or supporting the engine for any reason, do not use a jack under the oil pan, crankshaft balancer, or any sheet metal. Due to small clearances between the oil pan and the oil pump screen, jacking against the oil pan may cause it to be bent against the pump screen, resulting in a damaged oil pickup unit. Jacking against the crankshaft balancer may also cause oil seal and/or crankshaft bearing damage. Always use a J 28467-A (Universal Support Fixture) along with J 41044 (Engine Support Adapters) when raising or supporting the engine.

  1. Remove the generator. Refer to Generator Replacement in Engine Electrical.
  2. Remove the ignition control module. Refer to Ignition Control Module Replacement in Engine Electrical.
  3. Install the engine support fixture to the engine. Refer to Engine Support Fixture .
  4. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  5. Remove the 3-way catalytic converter. Refer to Catalytic Converter Replacement in Engine Exhaust.

  6. Object Number: 50513  Size: SH
  7. Remove the right side engine mount through bolt nut (2).

  8. Object Number: 50520  Size: SH
  9. Remove the left side engine mount through bolt nut (1).

  10. Object Number: 46662  Size: SH
  11. Remove the transmission oil cooler pipe bracket bolt and bracket.
  12. Lower the vehicle.
  13. Remove the A/C compressor from the A/C compressor bracket without recovering the refrigerant. Refer to Air Conditioning Compressor Replacement in HVAC Systems with A/C - Manual
  14. Raise the engine slightly in order to relieve tension on the through bolts.

  15. Object Number: 50513  Size: SH
  16. Remove the right engine mount through bolt (1).

  17. Object Number: 50520  Size: SH
  18. Remove the left engine mount through bolt (2).
  19. Raise the engine enough to remove the engine mounts.
  20. Raise the vehicle.

  21. Object Number: 49837  Size: SH
  22. Remove the right engine mount bolts (1) and the right engine mount (2).

  23. Object Number: 50525  Size: SH
  24. Remove the left engine mount bolts (1) and the left engine mount (2).

Installation Procedure

    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.


    Object Number: 50525  Size: SH
  1. Install the left engine mount (2) and bolts (1) to the crossmember.
  2. Tighten
    Tighten the left engine mount bolts (1) to 58 N·m (43 lb ft).


    Object Number: 49837  Size: SH
  3. Install the right engine mount (2) and bolts (1) to the crossmember.
  4. Tighten
    Tighten the right engine mount bolts (2) to 58 N·m (43 lb ft).

  5. Lower the vehicle.
  6. Lower the engine until the mount bracket and mount through holes line up together.

  7. Object Number: 50520  Size: SH
  8. Install the left engine mount through bolt (2).

  9. Object Number: 50513  Size: SH
  10. Install the right engine mount through bolt (1).
  11. Install the A/C compressor to the A/C compressor bracket. Refer to Air Conditioning Compressor Replacement in HVAC Systems with A/C - Manual
  12. Raise the vehicle.

  13. Object Number: 46662  Size: SH
  14. Install the transmission oil cooler pipe bracket and bolt.
  15. Tighten
    Tighten the oil cooler pipe bracket to 17 N·m (13 lb ft).


    Object Number: 50520  Size: SH
  16. Install the left side engine mount through bolt nut (1).
  17. Tighten
    Tighten the engine mount through bolt nut (1) to 80 N·m (59 lb ft).


    Object Number: 50513  Size: SH
  18. Install the right side engine mount through bolt nut (2).
  19. Tighten
    Tighten the engine mount through bolt nut (2) to 80 N·m (59 lb ft).

  20. Install the 3-way catalytic converter. Refer to Catalytic Converter Replacement in Engine Exhaust.
  21. Lower the vehicle.
  22. Remove the engine support fixture.
  23. Install the ignition control module. Refer to Ignition Control Module Replacement in Engine Controls - 3.8L.
  24. Install the generator. Refer to Generator Replacement in Engine Electrical.