GM Service Manual Online
For 1990-2009 cars only

    Object Number: 374269  Size: SH

    Notice: Broken or deteriorated mounts can cause misalignment and destruction of certain drive train components. When a single mount breaks, the remaining mounts are subjected to abnormally high stresses.

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Inspect for loose or missing bolts at the following locations:
  3. • The engine mount bracket to the engine
    • The engine mount to the engine mount frame bracket and the through-bolts.
    • The engine mount frame bracket to the frame.
  4. Replace loose or missing bolts. Refer to the following procedures:
  5. •  Engine Mount Replacement - Left Side
    •  Engine Mount Replacement - Right Side

    Object Number: 374320  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.

  6. Using a jack on the square tab at the rear of the engine block (left side shown the right side requires removal of the starter) raise the engine in order to complete the following tasks:
  7. • Remove weight from the engine mount.
    • Place a slight tension on the rubber cushion.
    • Observe the engine mount while raising the engine.
  8. Replace the engine mount if the following conditions exist:
  9. • Heat check cracks cover 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.
  10. Lower the vehicle.