An extended engine crank or reduced engine power condition may be the result of incorrect tires mounted on some 2016-2023 Camaro SS, Camaro SS 1LE (RPO A1Y); 2017-2023 Camaro ZL1; and 2018-2023 Camaro ZL1 1LE (RPO A1Z) models. (Fig 13)
Fig. 13
If these conditions are present, inspect the left-rear wheelhouse liner for a rub-through condition caused by the installation of larger, incorrect tires. (Fig. 14) These conditions may be difficult to diagnose, so it’s important to check the tires installed on the vehicle. Some customers may have installed larger, aftermarket tires.
Fig. 14
The oversized tires may damage the body-to-fuel pump harness and the chassis module-to-fuel pump connector X350. (Fig. 15) In addition, the damaged harness may cause an intermittent short during heavy acceleration and the F35RA fuse may be blown in the rear fuse block.
Fig. 15
If the concern is caused by a rub-through condition and the vehicle is not equipped with the original equipment (OE) tires, advise the customer of the importance to use the same tire size and manufacturer with which the vehicle was originally equipped. Damaged caused by incorrect, oversized tries is not covered by the New Vehicle Limited Warranty.
TIP: When checking the tires, always check the tire manufacturer too. The same tire size, but from a different manufacturer, could result in a difference of up to 10 mm in actual tire size.
If the engine performance concerns are caused by a rub-through condition at the left-rear wheelhouse liner, yet the vehicle is equipped with the OE tires, repair the harness and submit a field product report. Be sure to include photos and tire information in the report.
For additional information, including OE tire information for Camaro SS and ZL1 models, refer to Bulletin #20-NA-104.
– Thanks to Kurtis Hoezee
