GM Service Manual Online
For 1990-2009 cars only

Engine Mount Replacement Front

Removal Procedure

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.


    Object Number: 468134  Size: SH
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the starter if replacing the right side engine mount. Refer to Starter Motor Replacement in Engine Electrical.
  3. Remove the oil filter if replacing the left side engine mount.
  4. Remove the engine mount through-bolt and nut for the side being replaced.

  5. 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 (left side shown) at the rear of the engine block, raise the engine.
  7. Raise the engine only enough to remove the engine frame side mount.

  8. Object Number: 466619  Size: SH
  9. Remove the bolts for the right side engine frame side mount (4WD shown), if replaceing the right side.
  10. Remove the engine frame side mount.

  11. Object Number: 466623  Size: SH
  12. Remove the bolts for the left side engine frame side mount (RWD shown), if replacing the left side.
  13. Remove the engine frame side mount.

  14. Object Number: 466610  Size: SH
  15. If the engine mount bracket requires replacement, remove the bolts holding the engine mount bracket to the engine.
  16. Remove the engine mount bracket.

Installation Procedure


    Object Number: 466610  Size: SH
  1. Install the engine mount bracket to the engine.
  2. 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.

  3. Install the engine mount to engine bolts.
  4. Tighten
    Tighten the engine mount bracket to the engine bolts to 51 N·m (38 lb ft).


    Object Number: 466619  Size: SH
  5. Install the engine frame side mount to the frame (right side 4WD shown).
  6. Install the engine frame side mount bolts.
  7. Tighten
    Tighten the engine frame side mount bolts to 58 N·m (43 lb ft).

  8. Lower the engine.

  9. Object Number: 468134  Size: SH
  10. Install the engine mount through-bolts and nuts.
  11. Tighten
    Tighten the through-bolts or the nuts to the following:

    • Tighten the through-bolts to 95 N·m (70 lb ft).
    • Tighten the nuts to 68 N·m (50 lb ft).
  12. Install the starter, if removed. Refer to Starter Motor Replacement in Engine Electrical.
  13. Install the oil filter, if removed. Refer to Engine Oil and Oil Filter Replacement .
  14. Lower the vehicle.

Engine Mount Replacement Rear

Removal Procedure


    Object Number: 339139  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. Remove the nut holding the rear engine mount to the transmission support.

  3. Object Number: 339147  Size: SH
  4. Remove the mount to transmission bolts.
  5. Raise the transmission using a suitable transmission jack, just enough in order to permit the removal of the mount.

  6. Object Number: 339174  Size: SH
  7. Remove the mount.

Installation Procedure


    Object Number: 339174  Size: SH
  1. Install the mount.

  2. Object Number: 339147  Size: SH
  3. Loosely install the mount to transmission bolts.
  4. Lower the transmission.

  5. Object Number: 339139  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.

  6. Install the nut holding the rear engine mount to the transmission support.
  7. Tighten

        • Tighten the nut to 54 N·m (40 lb ft).
        • Tighten the bolt to 47 N·m (35 lb ft).
  8. Lower the vehicle.