Service Repair

Corvette May Have Pinched Wires

Jan. 12, 2021

This bulletin applies to 2018 Chevy Corvette vehicles equipped with a 6.2L LT1 or LT4 engine. The vehicle may have an SES lamp on accompanied by any of the following DTCs: P06DA, P06DB, P06DC, P250A, P0300, P0340, P0341, P0335, P0336, P0641, P0011, P0010, P2088, P2089, and/or P2230.

Information courtesy of Mitchell 1

Mike Mavrigian

The customer may experience a possible crank, no-start or stall. The cause is a possible wiring jumper harness chaffed at the bolt at the X154 connector on the lower left (driver) side of the engine front cover.

Inspect for the wiring harness being chaffed or pinched under the bracket. Before installing a new jumper harness, be sure to inspect the harness.

Example of chafed wire under the bracket.

Inspect the jumper harness. 1) Example of a good harness. Note that it clears the bracket’s mounting eyelet. 2) This harness is suspect and may get pinched under the bracket when installed. If the harness is not pinched or otherwise damaged but is very close to the bracket ear, adjust as needed to ensure that no damage will occur.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

About the Author

Mike Mavrigian | Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.