GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39914 Serpentine Belt Tensioner Unloader

Removal Procedure


    Object Number: 1309849  Size: SH
  1. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  2. Remove the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement .
  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 left idler pulley (3).
  5. Carefully release J 39914 to relieve the drive belt tensioner spring tension.
  6. Remove J 39914 from the drive belt tensioner (8).

  7. Object Number: 1317166  Size: SH
  8. Loosen the left belt idler pulley bolt.
  9. Remove the left belt idler pulley and bolt from the engine front cover.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1317166  Size: SH
  1. Install the left belt idler pulley and bolt to the engine front cover.
  2. Tighten
    Tighten the bolt to 50 N·m (37 lb ft).


    Object Number: 1309849  Size: SH
  3. Insure the drive belt is properly centered on all the pulleys except the right idler pulley (3).
  4. Using J 39914 rotate the drive belt tensioner away from the drive belt.
  5. Install the drive belt to the left idler pulley (3).
  6. Carefully release J 39914 allowing the drive belt tensioner (8) to come in contact with the drive belt.
  7. Remove J 39914 from the drive belt tensioner (8).
  8. Inspect the drive belt to insure the belt is properly centered on all the pulleys (1-8).
  9. Install the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement .
  10. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .