GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2005 🢒 Montana - 4WD 🢒 Suspension 🢒 Automatic Level Control 🢒 Air Compressor Replacement

Removal Procedure
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

    2. Object Number: 187281 Size: MH
  2. Squeeze the clips on the side of the air compressor filter (1) in order to remove the filter from the underbody rail.
  3. Remove the compressor bracket bolt.
  4. Remove the compressor bracket nuts. Allow the compressor to hang from the bracket hook.
  5. Remove the air line from the air dryer.
  6. Disconnect the air compressor electrical connector.
  7. Rotate the air compressor and the bracket 90 degrees in order to disengage the compressor bracket hook from the vehicle.
  8. Remove the air compressor with the air compressor bracket.
  9. Remove the air compressor dryer. Refer to Automatic Level Control Air Dryer Replacement .
  10. Remove the air compressor relay from the air compressor bracket.

    11. Object Number: 227997 Size: SH
  11. Remove the air compressor bolts.
  12. Remove the air compressor from the air compressor bracket.
  13. Remove the air compressor filter hose from the air compressor at 2 places.

Installation Procedure
  1. Install the air compressor filter hose to the air compressor at 2 places.

    2. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 227997 Size: SH
  2. Install the air compressor to the air compressor bracket.

    3. Tighten
    Tighten the bracket to 50 N·m (37 lb ft).

  3. Install the air compressor bolts/screws.

    4. Tighten
    Tighten the air compressor bolts/screws to 4 N·m (35 lb in).

  4. Install the air compressor shield.

    5. Tighten
    Tighten the bolts to 3 N·m (27 lb in).

  5. Install the air compressor relay to the air compressor bracket.
  6. Install the air compressor dryer. Refer to Automatic Level Control Air Dryer Replacement .

    7. Object Number: 187281 Size: MH
  7. Install the air compressor bracket to the underbody rail and rotate the air compressor bracket 90 degrees in order to allow the air compressor to hang from the air compressor bracket hook.
  8. Connect the air compressor electrical connector.
  9. Install the air line to the air dryer.
  10. Install the air compressor bracket nuts.

    11. Tighten
    Tighten the air compressor bracket nuts to 10 N·m (89 lb in).

  11. Install the air compressor bracket bolt.

    12. Tighten
    Tighten the air compressor bracket bolt/screw to 50 N·m (37 lb ft).

  12. Install the air compressor filter (1) to the underbody rail.
  13. Lower the vehicle.