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.
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.
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.
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 brake pulsation issues on 2014-2016 Corvettes equipped with the heavy-duty brake system (RPO J55). Customers may comment about a pulsation and/or vibration when applying the brakes.
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.
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.
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.
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