GM Service Manual Online
For 1990-2009 cars only

Problem

Action

There is no pressure in the system.

Refer to Filling Reservoirs in Air Brakes.

The air system is leaking.

Repair air loss as necessary to the line.

The compressor system not operating properly.

Refer to Air Compressor Fails to Maintain Sufficient Pressure in Air Compressor.

Refer to Auxiliary Air Compressor Inoperative in Engine Exhaust.