GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Chevrolet
🢒
1999
🢒
Chevrolet C-Series Medium Duty Truck B7
🢒
Brakes
🢒
Air Brakes
🢒 Primary Supply Reservoir Safety Valve Leakage Test
Coat the safety valve exhaust vent with a soap solution.
Check that the leakage is less than a 25 mm (1 in) bubble in 5 seconds.
Clean or replace the valve (1) if leakage exceeds these specifications.