Pressure Loss with Engine Off and Brakes Applied. GMC Truck GMC C-Series Medium Duty Truck B7 1998

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC C-Series Medium Duty Truck B7 🢒 Brakes 🢒 Air Brakes 🢒 Pressure Loss with Engine Off and Brakes Applied

Checks	Action
Check for a faulty air brake valve.	Refer to Air Brake Application Valve Operational Check .
Check if the air line leaks.	Refer to Air Brake System Leak Test .
Check the spring brake chamber hose for leaks.	Refer to Air Brake System Leak Test .
Check the compressor and the governor for leaks.	Refer to Air Compressor Not Unloading . or Air Supply Contaminated or Air Compressor Excessive Noise . or Air Compressor Fails to Maintain Sufficient Pressure or Air Pressure Excessively Low or High