Chevrolet · Canada · High
Chevrolet J9500, H7500 +9 more: Brakes
Affects Chevrolet J9500, H7500, T6500, M9500, N9500, M6500, C6500, D9500, F9500, H9500, J7500 · 1975–1978 — about 254 vehicles.
The hazard
MEDIUM AND HEAVY DUTY TRUCKS EQUIPPED WITH EATON ANTI-LOCK AIR BRAKE SYSTEM. THE PISTON IN THE ANTI-LOCK RELAY VALVES MAY EXPAND WHEN EXPOSED TO CERTAIN FLUID CONTAMINATES WHICH MAY BE FOUND IN THE AIR BRAKE SYSTEM. EXPANDED PISTONS CAN STICK OR JAM IN THE VALVES AND PREVENT AIR DELIVERY TO THE BVRAKE CHAMBERS CAUSING A LOSS OF BRAKING POWER ON THE AFFECTED AXLE. THIS CONDITION WOULD RESULT IN LONGER STOPPING DISTANCES.
What to do
Contact your dealer; the remedy details were not included in the filing.
Critical — crash/injury risk now
High — injury risk; see remedy
Moderate — fix at next service
Low — minor / informational