GM Service Manual Online
For 1990-2009 cars only

    Object Number: 309158  Size: SH
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the oil pan skid plate.

  3. Object Number: 310119  Size: SH
  4. Remove the engine protection shield.

  5. Object Number: 657625  Size: SH

    Notice: Broken engine mountings can cause misalignment of certain drive-train components. Misalignment of drive-train components causes eventual destruction of the drive-train components.

    If one engine mount breaks, the rest of the engine mounts will have increased stress put on them. This could cause the rest of the engine mounts to break.

  6. Inspect for loose or missing bolts at the following locations:
  7. • Engine mount bracket to engine
    • Engine mount frame bracket to frame
    • Engine mount to engine mount bracket
    • Engine mount to engine mount frame bracket

    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.

  8. Replace missing or loose bolts. Refer to Fastener Tightening Specifications .

  9. Object Number: 657613  Size: SH

    Notice: When raising or supporting the engine for any reason, do not use a jack under the oil pan, any sheet metal, or the crankshaft pulley. Lifting the engine in an unapproved manner may cause component damage.

  10. If the vehicle is 4WD you will not be able to access the lifting points on the engine. In order to raise the engine attach a chain to the front of the engine. Then follow the inspection steps.
  11. If the vehicle is RWD, in order to raise the engine to inspect the left engine mount, use a suitable jack on the ground wire bolt bosses on the left side of the engine

  12. Object Number: 657615  Size: SH
  13. If equipped with automatic transmission remove the bolt retaining the transmission oil cooler line bracket.
  14. Move the transmission oil cooler lines aside.
  15. In order to raise the engine to inspect the right engine mount use a suitable jack on the ground wire bolt bosses on the right side of the engine
  16. Perform the following in order to inspect the engine mounts:
  17. 11.1. Raise the engine to remove weight from the engine mount.
    11.2. Place a slight tension on the rubber cushion.
    11.3. Observe the engine mount for the following while raising the engine.
       • Heat check cracks covering the hard rubber surface.
       • The rubber cushion is separated from the metal plate of the engine mount.
       • There is a split through the rubber cushion.
  18. Replace the engine mount if any of the above conditions exist.

  19. Object Number: 310119  Size: SH
  20. Install the engine protection shield and bolts.
  21. Tighten
    Tighten the engine protection shield bolts to 20 N·m (15 lb ft).


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

  24. Lower the vehicle.