Several GM vehicle models may feature two distinctively different-looking per-cylinder valve-cover-mounted ignition coils. This is due to a supplier difference and, according to GM, does not affect performance or serviceability.
Chevy and GMC vehicles equipped with LGH, LML, LUZ, LWN, L5P and LH7 diesel engines may exhibit excessive smoke at the tailpipe, with DTC P2002 set. This may be the result of a cracked or broken diesel particulate filter (DPF).
This bulletin applies to 2016-2019 Chevy Corvette models equipped with a 6.2L LT1/LT4/LT5 engine. The SES lamp may be on and rich running condition DTCs P0172 and P0175 may be stored. The possible cause involves the high pressure fuel pump.
Owners of 2014-2016 Chevy Corvettes equipped with a 6.2L LT1 or LT4 engine and automatic transmission may comment about a rattle noise heard from the bell housing area. If service manual diagnosis does not isolate the noise, the culprit may be the flexplate due to distortion or cracking.
This bulletin applies to 2013-2019 Chevy Malibu vehicles equipped with a 2.0L engine. The MIL may be on, accompanied by DTC P0172 (fuel trim system rich) set in the ECM. The condition may be caused by driving the vehicle in short intervals, allowing excess fuel to collect in the crankcase.
This bulletin applies to 2010-2012 Chevy Express and 2011-2012 Silverado 2500HD/3500 series trucks equipped with a 6.6L Duramax diesel engine. Some vehicles were involved in a mid-year change. Some may have been built with a flywheel housing that uses two different style seals (left side and right side seals are different).
This bulletin applies to 2013 – 2019 Chevy Malibu vehicles equipped with a 2.5L or 2.0L engine. The same engines are available in a number of GM vehicles including Buick Envision and Regal, Cadillac CTS, ATS and CT6, Chevy Camaro, Equinox, Impala and Traverse and GMC Acadia, Canyon and Terrain.
A “small number” of ignition and start switch housings are involved in a recall involving 2010-2013 Chevy Equinox, 2013 Buick Encore, 2011 Buick Regal, 2013-2014 Buick Verano, 2011-2016 Chevy Cruze, 2013-2015 Chevy Malibu and 2011-2013 GMC Terrain models. The ignition system may contain a damaged electronic park lock lever that could fail to prevent the ignition key to be removed when the transmission is in a position other than park.
Some owners of 2006-2012 Chevy Corvette Z06 or 2009-2012 ZR1 models may comment on a rattle or tapping noise from under the hood.
This bulletin applies to 2014-2019 Chevy Corvettes equipped with a 6.2L LT1, LT4 or LT5 engine, regarding a concern of engine thermostat tick noise and/or running hot.
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