GMC · Canada · High
GMC C Series: Brakes
Affects GMC C Series · 1977 — about 0 vehicles.
The hazard
On certain C30 vehicles, the master cylinder to hydraulic brake booster attaching bolts may have been over tightened resulting in stripped threads and/or cracking of the booster casting. This could result in the master cylinder separating from the brake booster during a brake application and may cause a loss of vehicle control without prior warning.
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