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.
This bulletin applies to 2009-2018 Chevy Impala models equipped with automatic transmissions. Some customers may comment that the MIL lamp is on. In “rare” cases, they may also note that there is no PRNDL display.
This bulletin applies to 2015-2016 Corvette models equipped with an 8L90 transmission. The customer may comment on firm garage shifts, Park to Drive or Park to Reverse, after the vehicle has been sitting for several hours with the engine off, and/or a clunk noise that occurs as the engine starts or immediately after the engine starts, along with an illuminated MIL. DTC P16F3 may be found as an active or history DTC.
This bulletin applies to 2015-2017 Chevy City Express vans. Some customers may comment on a clicking noise originating from the front axle area during takeoff/acceleration. This may simply be due to a lack of grease on the hub bearing surface.
On some 2014-2017 Chevy Corvette models, cracks on the top surface of the left fuel tank fuel pump module flange may cause a fuel odor or a loss of fuel on the ground. A check engine light may illuminate if the fuel tank is less than half full.
This bulletin applies to 2010 – 2017 Chevy Equinox and GMC Terrain vehicles. Any combination of the following DTCs may be present:
This bulletin applies to 2016-2019 Chevy Camaro vehicles equipped with a 2.0L or 2.5L engine. An engine oil leak may be found from the side of the engine block, near the starter. The condition may be caused by porosity in the cast engine block at a bed plate bolt hole location.
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