GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: 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.


    Object Number: 310259  Size: SH
  1. From under the hood, remove the engine mount to engine mount bracket bolts. (right side shown, left side similar).

  2. Object Number: 309158  Size: SH
  3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
  4. Remove the oil pan skid plate bolts and plate.
  5. Caution: 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.


    Object Number: 374320  Size: SH
  6. Using an adjustable jack on the square tab at the rear of the engine block, raise the engine.

  7. Object Number: 310267  Size: SH
  8. Remove the engine mount bolts. (right side shown, left side similar).
  9. Remove the engine mount.

  10. Object Number: 310262  Size: SH
  11. If equipped and necessary, remove the engine mount side bracket bolts and bracket. (right side shown, left side similar).

  12. Object Number: 781984  Size: SH
  13. Remove the engine mount bracket bolts.
  14. Remove the engine mount bracket.

Installation Procedure


    Object Number: 781984  Size: SH
  1. Install the engine mount bracket.
  2. Perform the following procedure prior to installing the engine mount bracket bolts.
  3. 2.1. Remove all traces of the original adhesive patch.
    2.2. Clean the threads of the bolt with denatured alcohol or equivalent and allow to dry.
    2.3. Apply threadlocker GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the bolts.

    Caution: Refer to Fastener Caution in the Preface section.

  4. Install the engine mount bracket bolts.
  5. Tighten
    Tighten the engine mount bracket bolts to 75 N·m (55 lb ft).


    Object Number: 310262  Size: SH
  6. Position the engine mount side bracket to the engine, if removed and equipped. (right side shown, left side similar).
  7. Install the engine mount side bracket bolts.
  8. Tighten
    Tighten the engine mount side bracket bolts to 50 N·m (37 lb ft).


    Object Number: 310267  Size: SH
  9. Install the engine mount. (right side shown, left side similar).
  10. Install the engine mount bolts.
  11. Tighten
    Tighten the engine mount bolts to 50 N·m (37 lb ft).

  12. Lower the engine.

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

  16. Lower the vehicle.

  17. Object Number: 310259  Size: SH
  18. Install the engine mount to engine mount bracket bolts. (right side shown, left side similar).
  19. Tighten
    Tighten the engine mount to engine mount bracket bolts to 65 N·m (48 lb ft).