GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 38122-A Crankshaft Pulley Holder
    • J 44811 Accessory Belt Tensioner Unloader
    • SA9105E Engine Three-Bar Fixture

Removal Procedure

    Caution: Ensure that the vehicle is properly supported and squarely positioned. To help avoid personal injury when a vehicle is on a hoist, provide additional support for the vehicle on the opposite end from which the components are being removed.


    Object Number: 898897  Size: SH
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Disconnect the intake air temperature (IAT) sensor connector.
  3. Loosen the clamp at the air cleaner assembly.
  4. Remove the push pin attachment from the outlet resonator/duct assembly to support bracket.
  5. Loosen the clamp at the throttle body assembly.
  6. Disconnect the PCV fresh vent hose at the cam cover.
  7. Remove the outlet resonator/duct assembly.

  8. Object Number: 952023  Size: SH
  9. Install the SA9105E setup for SUV application. Refer to Engine Support Fixture .

  10. Object Number: 928650  Size: SH
  11. Remove the right hand mount. Refer to Engine Mount Replacement .
  12. Remove the right hand engine mount bracket.
  13. Jack the vehicle or raise on a hoist Lifting and Jacking the Vehicle in General Information.
  14. Remove the right wheel and splash shield.

  15. Object Number: 951829  Size: SH
  16. Install the J 44811 .

  17. Object Number: 894941  Size: SH
  18. Remove the accessory drive belt.
  19. Important: To remove the tensioner bolt, an access hole has been provided through the inner and outer engine rail.

  20. Remove the tensioner bolt.
  21. Remove the tensioner assembly.

  22. Object Number: 895194  Size: SH
  23. Install the J 38122-A .

  24. Object Number: 895197  Size: SH
  25. Remove the crankshaft balancer pulley bolt and pulley. Discard the pulley.

  26. Object Number: 895054  Size: SH

    Notice: To avoid damage to the front cover assembly, do not pry against the cover.

    Important: The crankshaft balancer pulley bolt head and washer assembly prevents oil leakage at the center of the pulley. Do not damage the sealing surfaces. If the pulley cannot be removed by pulling with your hand, use a three-jaw puller.

  27. Remove the front cover.
  28. Remove the lower water pump assembly bolt.
  29. Remove the front cover/oil pump assembly and gasket.

Installation Procedure

    Important: A new oil seal can be installed either in or out of the vehicle. Refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement .


    Object Number: 895054  Size: SH
  1. Install the front cover assembly.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the front cover assembly bolts and lower water pump bolt.
  4. Tighten

        • Tighten the cover-to-block bolts - L61 to 25 N·m (18 lb ft).
        • Tighten the water pump bolts - L61 to 25 N·m (18 lb ft).

    Object Number: 895197  Size: SH
  5. Lubricate the front seal and sealing surface of the pulley with clean motor oil.
  6. Install the balancer pulley onto the crankshaft indexing keyway. Use care to properly align the flats on the balancer pulley with the flats on the oil pump drive in the front cover assembly.
  7. Install the crankshaft damper pulley.
  8. Install a new crankshaft balancer pulley bolt with washer assembly.

  9. Object Number: 895194  Size: SH
  10. Install the J 38122-A .
  11. Tighten
    Tighten the crankshaft pulley bolt - L61 to 100 N·m (74 lb ft) +75 degrees.


    Object Number: 951829  Size: SH
  12. Install the drive belt tensioner assembly.
  13. Tighten
    Tighten the drive belt tensioner bolt - L61 to 45 N·m (33 lb ft).


    Object Number: 896375  Size: SH
  14. Route the belt around the alternator and A/C compressor. Install the J 44811 onto the tensioner and unload spring tension from the tensioner while positioning the belt.
  15. Release the tensioner and remove the tool.
  16. Install the right engine inner splash shield.
  17. Install the right wheel and hand tighten the wheel nuts.
  18. Lower the vehicle.
  19. Tighten the wheel nuts.
  20. Tighten
    Tighten the wheel nuts to 125 N·m (92 lb ft).


    Object Number: 928024  Size: SH
  21. Install the right hand engine bracket and bolts to the engine. Refer to Engine Mount Replacement .
  22. Tighten
    Tighten the engine mount bracket-to-engine bolts - L61 to 110 N·m (81 lb ft).


    Object Number: 928650  Size: SH
  23. Install the shims on the right hand side rail studs.
  24. Install the right hand engine shims onto the studs.
  25. Install the right hand engine mount over the body side rail studs.
  26. Install the right hand engine mount nuts.
  27. Tighten
    Tighten the engine mount bracket-to-body nuts to 110 N·m (81 lb ft).

  28. Install the right hand engine mount bolts to the engine mount bracket.
  29. Tighten
    Tighten the engine mount-to-engine mount bracket bolts to 50 N·m (37 lb ft).


    Object Number: 898897  Size: SH

    Important: When starting the vehicle, check for excessive idle shake. Powertrain rebalance may be required.

  30. Remove the SA9105E .
  31. Position the outlet resonator/duct assembly into position.
  32. Connect the PCV fresh air vent hose assembly.
  33. Tighten the clamp at the throttle body assembly.
  34. Position the outlet resonator/duct assembly up with the support bracket and install the push-pin.
  35. Tighten the clamp at the air cleaner assembly.
  36. Connect the intake air temperature (IAT) sensor connector.
  37. Connect the negative battery cable.
  38. Tighten
    Tighten the negative battery terminal bolt to 17 N·m (13 lb ft) + 75 degrees.