This bulletin applies to 2009-2010 Chevy HHR vehicles. According to GM, “in rare instances” a technician may comment that they hear a short, sharp rattle noise from the front of the engine at start-up. Codes P0011, P0014, P0016 or P0017 may also be set.
Owners of 2010-2014 Chevy Camaros may comment about a popping noise (intermittent or multiple) from the rear of the vehicle after a cold start (this may also occur during an EVAP purge event).
This bulletin applies to 2013 Chevy Equinox and GMC Terrain vehicles built before 9-6-2012. The customer may experience an intermittent theft deterrent alarm, horn or hood ajar message.
Certain 2004-2014 GM vehicles may be equipped with a new style of catalytic converter, technically known as the close-coupled catalytic converter, which provides quick warmup, resulting in lower tail pipe emissions earlier in the operating cycle.
Some owners of 2013 Chevy Caprice vehicles may comment about roughness or vibration felt at stops and a clunk from the driveline on acceleration from stops. This may be caused by a broken motor mount.
This bulletin applies to 2012-2013 Chevy Tahoe Police vehicles equipped with StabiliTrak. The customer may comment that they are unable to disable the StabiliTrak by pressing and holding the TCS/StabiliTrak button for 5 seconds as the owner’s manual indicates.
Some owners of select GM vehicles may comment on a low brake pedal during braking. See the application list at the end of this bulletin.
This bulletin applies to 2007-2013 Chevrolet Silverado vehicles equipped with the Allison LCT1000 5-speed or 6-speed transmission, where the vehicle may not move in forward or reverse.
Owners of 2014 Chevy Equinox vehicles may experience a noise or a fluid leak from the power steering pump, gear or high pressure side power steering hose during extreme low outdoor temperature operation.
Owners of a 2012 Chevy Aveo may comment about an SES light on. Initial diagnosis may display any of the following fuel trim and/or O2 sensor related codes: 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/or P2273.