Some 2011 Chevy HHR vehicles may show a Service Engine Soon light on, with DTCs P0016 and/or P0017 stored. This may be the result of a camshaft reluctor that has moved on the camshaft.
Owners of a 2011-2012 Chevy Volt (built prior to Sept. 20, 2011) may complain about a rattle-type noise heard from the front of the vehicle at slow speeds over bumps.
This bulletin applies to 2014 and prior GM vehicles equipped with an automatic transmission and auto-start. Some vehicles may rock or move slightly forward or rearward while in Park at start-up after a cold soak.
An owner of a 2010-2013 Chevy Equinox or GMC Terrain may complain about a power liftgate that does not stay fully open or drifts down a few inches before coming to a rest.
The owner of a 2008 Chevy Cobalt hybrid may note a chuggle or stall when coming to a stop. The engine will restart. The engine tachometer will drop to zero and not AutoStop.
Owners of 2010-2014 Chevy Camaro vehicles may comment about an intermittent pop or multiple popping noises from the rear of the vehicle shortly after a cold start or EVAP purge event.
This bulletin applies to 2001-2013 Chevy Corvette models. You may encounter a SES lamp and a misfire condition, with DTC P0301-P0308 or P0300 only (random misfires on random cylinders).
This bulletin applies to 2009-2013 Chevy Avalanche, Silverado, Suburban and Tahoe and GMC Sierra and Yukon models. DTC B0081 can be set in the SDM (sensing diagnostic module) and PPS (passenger presence system).
Owners of 2012 Chevy Equinox vehicles may complain about insufficient cooling when the A/C compressor is turned on. The A/C compressor may not have been torqued properly at the time of assembly, causing a load on the compressor shaft.
This bulletin applies to 2012 Chevy Camaro models. The SES light may be on, accompanied by stored fuel trim and/or O2 sensor related DTCs including P0101, P0137, P0138, P0140, P0141, P0157, P0158, P0160, P0161, P0171, P0174, P0420, P0430, P1174, P1175, P2096, P2097, P2098, P2099, P2177, P2178, P2179, P2180, P2187, P2188, P2189, P2190, P2270, P2271, P2272 and P2273.