This bulletin applies to 2014-2019 Chevy Corvette vehicles equipped with a 6.2L LT1 or LT4 engine. The SES light may be on, accompanied by DTC P0106 and P0506. This may be caused by a broken valve spring.
Chevy ‘Rotational Click’ is OK
This bulletin applies to 2018-2019 Chevy Traverse and Equinox, 2019 Blazer, 2017-2019 Cruze and Malibu vehicles, all equipped with a GF9T 45/50/60/65 transmission. A “rotational click” noise may be heard after the engine is shut off.