GM Service Manual Online
For 1990-2009 cars only

Tools Required

EN-47988 Serpentine Belt Tension Unloader

Removal Procedure


    Object Number: 1759720  Size: SH
  1. Remove the passenger side diagonal brace, if more clearance is required. Refer to Front Fender Upper Diagonal Brace Replacement .
  2. Reposition the underhood bussed electrical center (UBEC), if more clearance is required.
  3. Install the EN-47988 , to the drive belt tensioner.
  4. Rotate the EN-47988 clockwise in order to relieve the tension on the belt tensioner.

  5. Object Number: 1759721  Size: SH
  6. Remove the drive belt (1) from over the power steering pump pulley.
  7. Slowly release the EN-47988 .
  8. Remove the EN-47988 from the belt tensioner.
  9. Remove the drive belt (1) from around all the other pulleys.
  10. Clean and inspect the belt surfaces of all the pulleys.

Installation Procedure


    Object Number: 1759725  Size: SH
  1. Install and route the drive belt around all the pulleys except for the power steering pump pulley.
  2. Ensure that when installing the EN-47988 (1), to the belt tensioner that the EN-47988 is NOT installed above the drive belt (2).

  3. Object Number: 1759722  Size: SH
  4. Ensure that when installing the EN-47988 (1), to the belt tensioner that the EN-47988 is installed below the drive belt (2).
  5. Rotate the EN-47988 clockwise in order to relieve the tension on the belt tensioner.
  6. Ensure that the drive belt is still properly routed around all the other pulleys, then install the drive belt over the power steering pump pulley.
  7. Slowly release the EN-47988 .
  8. Remove the EN-47988 from the belt tensioner.
  9. Inspect the drive belt for proper installation and alignment.
  10. Position the UBEC, if required.
  11. Install the passenger side diagonal brace, if required. Refer to Front Fender Upper Diagonal Brace Replacement .