Hummer H2. Manual — part 2224

9. Pressurize the air springs. Refer to Air Suspension Pressurization Procedure .

10. Lower the vehicle.

11. Start the vehicle and run for approximately 2 minutes to ensure that the air spring leveling system is

functioning properly.

12. Verify the D height. Refer to Trim Height Specifications in Suspension General Diagnosis.

13. Check for leaks. If a leak is found at the air supply line connections replace the air supply lines. Refer to

Air Suspension Air Line Replacement .

COMPRESSOR AUTOMATIC LEVEL CONTROL REPLACEMENT

Removal Procedure

1. Remove the compressor assembly from the vehicle and place on a bench. Refer to Compressor

Assembly Automatic Level Control Air Replacement .

CAUTION: Do NOT remove an air supply pipe in an attempt to depressurize the air

suspension. Always follow the Air Suspension Depressurization
Procedure in Air Suspension. Failure to follow this procedure may cause
personal injury or damage to the vehicle.

2004 Hummer H2

2004 SUSPENSION Air Suspension - Hummer H2

Fig. 32: View Of Compressor
Courtesy of GENERAL MOTORS CORP.

2. Disconnect all electrical connections (2, 3).

3. Remove connector (3) from the mounting bracket.

4. Remove the mounting nuts (1).

5. Remove the compressor.

Installation Procedure

2004 Hummer H2

2004 SUSPENSION Air Suspension - Hummer H2

Fig. 33: View Of Compressor
Courtesy of GENERAL MOTORS CORP.

1. Install the compressor.

2. Install the mounting nuts (1).

Tighten: Tighten the nuts to 25 N.m (18 lb ft).

3. Install connector (3) to the mounting bracket.

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2004 Hummer H2

2004 SUSPENSION Air Suspension - Hummer H2

4. Connect all electrical connections (2, 3).

5. Install the compressor assembly to the vehicle. Refer to Compressor Assembly Automatic Level

Control Air Replacement .

INFLATOR AIR SWITCH REPLACEMENT

Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

2. Disconnect the air inflator switch harness and the air line from the air compressor.

3. Lower the vehicle.

2004 Hummer H2

2004 SUSPENSION Air Suspension - Hummer H2