GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2003 🢒 DeVille 🢒 Suspension 🢒 Automatic Level Control 🢒 Automatic Level Control Air Compressor Head Replacement

Removal Procedure
  1. Remove the air compressor assembly from the vehicle. Refer to Air Compressor Replacement .

    2. Object Number: 344303 Size: SH
  2. Remove the air compressor connector from the connector anchor (slide the air compressor connector away from the air compressor and off of the anchor).
  3. Remove the 3 bolts and the heat shield from the air compressor bracket.
  4. Remove the air dryer. Refer to Automatic Level Control Air Dryer Replacement .

    5. Object Number: 227999 Size: SH
  5. Cut the harness tie.
  6. Remove the bolt and the harness tie.

    7. Important: Note the wire colors and the terminal numbers to ensure correct assembly.

  7. Remove the 2 harness ties and the wrap from the wires.

    8. Object Number: 228003 Size: SH
  8. Remove 2 wire terminals from the air compressor connector.
  9. Remove the air hose from the air compressor head.
  10. Remove the 3 head bolts and the air compressor head from the air compressor assembly.
  11. Remove the gasket from the air compressor head or the air compressor assembly.

Installation Procedure

    Object Number: 228003 Size: SH
  1. Install the new gasket on the air compressor assembly.

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the air compressor head on the air compressor assembly with the 3 bolts.

    3. Tighten
    Tighten the 3 bolts to 6 N·m (53 lb in).

  3. Connect the air hose to the air compressor head.
  4. Install the 2 wire terminals in the air compressor connector.

    5. Object Number: 227999 Size: SH
  5. Install the wrap around 4 wires and secure with 2 harness ties.
  6. Install 4 wires in the harness tie and install the harness tie on the air compressor head with the bolt.

    7. Tighten
    Tighten the bolt to 3 N·m (26 lb in).

  7. Install the air dryer. Refer to Automatic Level Control Air Dryer Replacement .

    8. Object Number: 344303 Size: SH
  8. Install the heat shield and the harness tie on the air compressor bracket with the two bolts.

    9. Tighten
    Tighten the bolts to 4 N·m (35 lb in).

  9. Connect the air compressor connector to the connector anchor.
  10. Install the air compressor on the vehicle. Refer to Air Compressor Replacement .