GENERAL MOTORS issued a recall on the C SERIES and K SERIES models

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.