Many 2015–2019 C7 owners with the 8-speed 8L90 automatic report a shudder or vibration at light throttle, often felt like driving over rumble strips. GM issued service information related to the transmission fluid. Ask a dealer to check your VIN.

The C5 connects the engine to the rear transaxle with a torque tube that has a driveshaft supported by bearings in rubber mounts. With age, the rubber and bearings wear and cause rumbling, groaning or rattling, often at idle or in certain RPM ranges.

Some C8 owners report clunks, shudder or harsh engagement from the TR-9080 dual-clutch transmission at low speeds, such as parking, creeping in traffic, or shifting into drive or reverse. Some of this is normal DCT behavior, but some cases need a dealer to check.

The 7.0L LS7 in the 2006–2013 C6 Z06 is known among owners for valve guide wear, mainly on the exhaust side, which in some cases has led to a dropped valve and serious engine damage. The 2013 427 Convertible also uses the LS7. How common it is and what causes it are still debated, so many owners have the heads checked and decide from there.

The harmonic balancer (crank pulley) on C5 and C6 LS engines can develop a visible wobble. It happens when the rubber ring between the hub and outer ring breaks down, or when the balancer has moved on the crank snout, often after a previous repair or pulley swap. A wobbling balancer can throw the belt and, if it has moved, can point to a deeper crank problem.

Many C7 owners, especially with wide-body Z06 and Grand Sport cars, report cracked or bent factory cast wheels, often after potholes. Cracks are usually on the inside barrel, out of sight. Low-profile tires and big wheels leave little cushion.

C5, C6 and C7 Corvettes use sealed hub bearing assemblies. They wear over time, especially with wide tires, track use or impacts. A failing hub causes a hum or growl that changes with speed and cornering.