GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39914 Serpentine Belt Tensioner Unloader

Removal Procedure

  1. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .

  2. Object Number: 1309849  Size: SH
  3. Using J 39914 rotate the drive belt tensioner (8) to release the tension on the drive belt.
  4. Remove the drive belt from the right idler pulley (2).
  5. Carefully release J 39914 to relieve the drive belt tensioner spring tension.
  6. Remove J 39914 from the drive belt tensioner (8).
  7. Provided the vehicle will not be raised or lifted to perform additional work. Utilizing a floor jack and a wood block, support the front of the engine using the following procedure.
  8. 6.1. Place the wood block between the lift point of the floor jack and the bottom of the engine oil pan.
    6.2. Raise the jack until the wood block comes into contact with the engine oil pan and is capable of supporting the weight of the engine.
  9. If the vehicle is to be raised or lifted in order to perform additional work. Support the engine using the engine support fixture. Refer to Engine Support Fixture .
  10. Remove the right engine mount. Refer to Engine Mount Replacement - Right Side .

  11. Object Number: 1370537  Size: SH
  12. Remove the drive belt from the remaining pulleys.

Installation Procedure


    Object Number: 1370537  Size: SH
  1. Install the drive belt to all the pulleys except the right idler pulley.
  2. Install the right engine mount. Refer to Engine Mount Replacement - Right Side .
  3. Depending on which method was used to support the engine. Remove the floor jack from under the engine oil pan or remove the engine support fixture.

  4. Object Number: 1309849  Size: SH
  5. Using J 39914 rotate the drive belt tensioner away from the drive belt.
  6. Install the drive belt to the right idler pulley (2).
  7. Carefully release J 39914 allowing the drive belt tensioner (8) to come in contact with the drive belt.
  8. Remove J 39914 from the drive belt tensioner (8).
  9. Inspect the drive belt to insure the belt is properly centered on all pulleys (1-8).
  10. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .