News Technical Service Bulletins

Corvette May Have Pinched Wires

Order Reprints
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Inspect for the wiring harness pinched or chaffed under the mounting bracket.

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. 

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. 

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Example of chafed wire under the bracket.

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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.

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