This bulletin applies to 2017-2019 Chevy Colorado and GMC Canyon trucks equipped with a 3.6L engine. Some customers may comment of engine noise or engine failure shortly after an engine oil change and a MIL on.
Some owners of 2007-2019 Chevy Avalanche, Silverado, Suburban or Tahoe vehicles, GMC Sierra and Yukon vehicles and Cadillac Escalades may comment on unwanted Stability Activation and/or a Service Stability message.
This bulletin applies to 2014-2017 Chevy Corvettes. The ABS, Service Traction Control System and/or Service Stabilitrak telltale lights may be on. During initial scan for EBCM module DTCs, you may find one or more DTC C0035-C0050 with specific symptom bytes 18, 5A, 0F.
This bulletin applies to 2015-2016 Chevy Corvette Z06 models equipped with the LT4 engine. Some owners may comment that the MIL is on with a DIC message displayed.
Some 2017 Cadillac Escalade vehicles (in addition to Chevy Suburban and Tahoe and GMC Yukon) may have been assembled with the wrong fasteners retaining the brake master cylinder to the brake vacuum booster.
General Motors advises inspection for piston damage when the MIL is on and the engine misfires and displays a ticking/knocking noise. This may be caused by an aftermarket ECM calibration/component and detonation that leads to melted pistons.
Owners of a 2016-2019 Chevy Corvette equipped with a 6.2L LT1, LT4 or LT5 engine may experience the SES light on and a rich running condition. Technicians may find DTC P0172 and P0175 stored. The cause may involve the high pressure fuel pump on these gasoline direct injection engines.
GM notes that 2013-2017 vehicles equipped with GDI engines (gasoline direct injection) may exhibit stalling, hesitation and lack of performance in high ambient temperatures.
Owners of 2010-2013 Chevy Camaros and/or technicians may notice brake fluid seeping from the master cylinder reservoir cap.
General Motors announced a recall of certain 2018 GMC Terrain, Acadia and Canyon vehicles built during March 2018.
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