GM Service Manual Online
For 1990-2009 cars only

Engine Mount Replacement Right

Removal Procedure

  1. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement in Engine Exhaust.

  2. Object Number: 307275  Size: SH
  3. Remove the engine mount-to-engine mount bracket bolts.
  4. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  5. Remove the tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

  6. Object Number: 401885  Size: SH
  7. Remove the push-in retainers from the wheelhouse panel.
  8. Remove the top clips (2) retaining the harness to the top of the wheelhouse panel.
  9. Remove the wheelhouse panel from the wheelhouse.
  10. Remove the engine protection shield, if equipped. Refer to Engine Protection Shield Replacement in Frame and Underbody.
  11. Important: DO NOT raise and/or support the engine by the crankshaft balancer, or oil pan.

  12. Raise and suitably support the engine using adjustable (screw type) jack stands.

  13. Object Number: 307279  Size: SH
  14. Remove the engine mount to engine bolts.
  15. Remove the right engine mount.

  16. Object Number: 307282  Size: SH
  17. Remove the lower engine mount bracket through bolts
  18. Remove the lower engine mount bracket from the frame.

Installation Procedure


    Object Number: 307282  Size: SH
  1. Install the lower engine mount bracket to the frame.
  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 lower engine mount bracket through bolts
  4. Tighten
    Tighten the through bolts to 92 N·m (68 lb ft).


    Object Number: 307279  Size: SH
  5. Position the right engine mount to the engine.
  6. Install the engine mount bolts.
  7. Tighten
    Tighten the engine mount bolts to 50 N·m (37 lb ft).

  8. Lower the engine.
  9. Remove the adjustable jack stands.

  10. Object Number: 307275  Size: SH
  11. Install the engine mount-to-engine mount bracket bolts.
  12. Tighten
    Tighten the engine mount-to-engine mount bracket bolts to 65 N·m(48 lb ft).

  13. Install the exhaust manifold. Refer to Exhaust Manifold Replacement in Engine Exhaust.

  14. Object Number: 401885  Size: SH
  15. Install the wheelhouse panel to the wheelhouse.
  16. Install the top clips (2) retaining the harness to the top of the wheelhouse panel.
  17. Install the push-in retainers to the wheelhouse panel.
  18. Install the tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  19. Install the engine protection shield, if equipped. Refer to Engine Protection Shield Replacement in Frame and Underbody.
  20. Lower the vehicle.

Engine Mount Replacement Left

Removal Procedure

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. Due to the small clearance between the oil pan and the oil pump screen, jacking against the oil pan may cause the pan to be bent against the pump screen. This will result in a damaged oil pickup unit.


    Object Number: 307275  Size: SH
  1. Remove the engine mount-to-engine mount bracket bolts. (Right side shown, left side similar).

  2. Object Number: 401885  Size: SH
  3. If vehicle is a 2 wheel drive (2WD), raise the vehicle to a height to work through the front wheelhouse opening.
  4. If vehicle is a 4 wheel drive (4WD), raise the vehicle in order to remove the front tires and wheels.
  5. Remove the left front tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  6. Remove the wheelhouse inner panel push pin retainers (2).
  7. Remove the wheelhouse inner panel (1).

  8. Object Number: 349061  Size: SH
  9. Remove the engine shield bolts.
  10. Remove the engine shield.
  11. Important: DO NOT raise and/or support the engine by the crankshaft balancer, or oil pan.

  12. Raise and suitably support the engine using adjustable (screw type) jack stands.

  13. Object Number: 679415  Size: SH
  14. Remove the engine mount bolts.
  15. For vehicles with 4WD, remove the front propeller shaft. Refer to Front Propeller Shaft Replacement in Propeller Shaft.
  16. Remove the left engine mount.

  17. Object Number: 307282  Size: SH
  18. Remove the lower engine mount bracket through bolts
  19. Remove the lower engine mount bracket from the frame.

Installation Procedure


    Object Number: 307282  Size: SH
  1. Install the lower engine mount bracket to the frame.
  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 lower engine mount bracket through bolts
  4. Tighten
    Tighten the through bolts to 92 N·m (68 lb ft).


    Object Number: 679415  Size: SH
  5. Position the left engine mount to the engine.
  6. Install the engine mount bolts.
  7. Tighten
    Tighten the engine mount bolts to 50 N·m (37 lb ft).

  8. Lower the engine.
  9. Remove the adjustable jack stands.
  10. Install the front propeller shaft. Refer to Front Propeller Shaft Replacement in Propeller Shaft.

  11. Object Number: 349061  Size: SH
  12. Position the engine shield to the vehicle.
  13. Install the engine shield bolts.
  14. Tighten
    Tighten the engine shield bolts to 20 N·m (15 lb ft).

  15. Lower the vehicle.

  16. Object Number: 401885  Size: SH
  17. Install the left front tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  18. Install the wheelhouse inner panel push pin retainers (2).
  19. Install the wheelhouse inner panel (1).

  20. Object Number: 307275  Size: SH
  21. Install the engine mount-to-engine mount bracket bolts. (Right side shown, left side similar).
  22. Tighten
    Tighten the engine mount-to-engine mount bracket bolts to 65 N·m (48 lb ft).