GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 STS 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Air Compressor Replacement

Removal Procedure
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Disconnect the exhaust system from the rear exhaust hangers.
  3. Remove the automatic level control (ALC) compressor bracket mounting bolts.
  4. Carefully lower the ALC compressor assembly.
  5. Twist the air tube at the ALC compressor clamp.
  6. Disconnect the air tube from the ALC compressor.
  7. Disconnect the ALC electrical harness connector.

    8. Object Number: 1371674 Size: SH
  8. Remove the ALC compressor bracket side mounting nut.
  9. Remove the ALC compressor with the bracket from the vehicle.

    10. Object Number: 1371668 Size: SH
  10. Remove the ALC compressor top bracket mounting screw.
  11. Remove the electrical harness connector from the ALC bracket.
  12. Disconnect the bleed hose from the clip.
  13. Remove the ALC bracket to ALC compressor screws.
  14. Remove the ALC bracket from the ALC compressor.

Installation Procedure
  1. Position the ALC bracket to the ALC compressor.

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

  2. Install the ALC bracket to ALC compressor screws and tighten to 9 N·m (80 lb in).
  3. Connect the bleed hose to the clip.
  4. Install the electrical connector to the ALC compressor bracket.
  5. Connect the air tube to the ALC compressor.
  6. Connect the ALC electrical harness connector.

    7. Object Number: 1371674 Size: SH
  7. Install the ALC bracket side mounting nut.

    8. Object Number: 1371668 Size: SH
  8. Install the ALC bracket mounting bolts and tighten to 9 N·m (80 lb in).
  9. Connect the exhaust system the rear exhaust hangers.
  10. Lower the vehicle.