GMC · Canada · Mod
GMC K Series, C Series: Structure
Affects GMC K Series, C Series · 1996 — about 41 vehicles.
The hazard
On certain vehicles, the crankshaft balancer centre attaching bolt was under-torqued. This bolt secures the balancer, which is pressed onto the crankshaft, and the accessory drive pulley which is attached to the balancer, to the engine crankshaft. If this bolt were to loosen, the balancer and drive belt pulley would eventually loosen and the drive belt could come off the pulley or break, causing a loss of drive to engine accessories such as the alternator and power steering pump. Correction: Crankshaft balancer centre bolt will be torqued to specification.
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