Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
A leak in the air tube between the rear shocks and compressor will cause excessive running of the compressor motor. After approximately 5 minutes of continuous running without a change in body-to-wheel height or system pressure, the Suspension Control module will command the compressor motor relay to the off state for the remainder of the ignition cycle.
The following conditions may cause a malfunction to occur in the compressor motor relay:
- A short to ground in the control circuit.
- An open in the control circuit.
- A short to battery in the control circuit.
- An open in the ignition 3 voltage circuit.