GMC · Canada · High
GMC C7, School Bus +1 more: Brakes
Affects GMC C7, School Bus, C6 · 1983–1987 — about 75 vehicles.
The hazard
SEVERE BRAKE CHATTER MAY CAUSE THE FRONT AXLE BRAKE CHAMBER MOUNTING BRACKETS TO DEVELOP CRACKS IN THE WELD AREA WHERE THE S-CAM TUBE ATTACHES TO THE CHAMBER SUPPORT SECTION. BRACKET FAILURE COULD RESULT IN LOSS OF FRONT WHEEL BRAKING AND POSSIBLE RESTRICTION IN STEERING CONTROL. THIS COULD CAUSE VEHICLE CRASH WITHOUT PRIOR WARNING. CORRECTION:REINFORCED FRONT AXLE BRAKE CHAMBER MOUNTING BRACKETS WILL BE INSTALLED AND,IF NOT FITTED,A FRONT BRAKE LIMITING VALVE.
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