GMC · Canada · Mod
GMC C Series, K Series: Brakes
Affects GMC C Series, K Series · 1979–1980 — about 57K vehicles.
The hazard
On certain vehicles equipped with cacuum power disc/drum brakes may experience brake vacuum booster fatigue cracks. Cracks may propogate to the extent that when a minimum stopping distance is required, vehicle crash without prior warning could occur.
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