GM Service Manual Online
For 1990-2009 cars only

    Notice: Allowing the drive belt tensioner to snap into the free position may result in damage to the tensioner.

  1. Remove the accessory belt drive belt to gain access to the accessory drive belt tensioner. Refer to Drive Belt Replacement .
  2. To gain access to the air conditioning (A/C) drive belt tensioner:
  3. 2.1. Remove the accessory belt drive belt. Refer to Drive Belt Replacement .
    2.2. Remove the A/C drive belt. Refer to Drive Belt Tensioner Replacement .
  4. Position a hex-head socket on the belt tensioner pulley bolt.
  5. Move the belt tensioner through it's full travel.
  6. • The movement should feel smooth.
    • There should be no binding.
    • The belt tensioner should return freely.
  7. If any binding is observed, replace the tensioner. Refer to Drive Belt Tensioner Replacement for the accessory drive belt tensioner or, refer to Drive Belt Tensioner Replacement for the AC drive belt tensioner.
  8. Install the drive belt(s). Refer to Drive Belt Replacement for the accessory belt or, refer to Drive Belt Replacement for the A/C belt.