GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
1998
🢒
GMC C-Series Medium Duty Truck B7
🢒
Brakes
🢒
Air Brakes
🢒 Moisture Ejector Valve Leakage Test
Release the brake pedal.
Cover the exhaust port and the seams with a soap solution.
Repair or replace the valve (2) if leakage appears.