2014 Chevrolet Corvette Problems: 4 Known Issues

On the 2014-2019 Chevrolet Corvette, some 2014–2019 Corvette LT1/LT4 engines can develop a tick and misfire associated with AFM lifter or pushrod faults. GM bulletin 15-06-01-002L addresses diagnosis and repair. Similar symptoms require confirmation.

On the 2014-2019 Chevrolet Corvette, a damaged crankshaft thrust bearing allows excessive crankshaft endplay on both the LT1 and LT4. The symptom set differs by transmission, which is why it is often misdiagnosed. On manual cars owners report engine stalling, clutch chatter, and hard shifting into first gear or reverse - all of which get blamed on the clutch or the TR6070 gearbox. On automatic cars it shows up as a vibration on launch and a clunk or noise from the engine. GM bulletin 19-NA-217 identifies the root cause as excessive crankshaft endplay from a damaged thrust bearing, and specifies the endplay window as 0.0015-0.0086 inch. Because the failure is at the crankshaft, replacing clutches, flywheels or torque converters does not fix it and owners can spend thousands chasing the wrong part.

On the 2014-2017 Chevrolet Corvette, the C7 uses a saddle-style twin fuel tank. On 2014-2017 cars, cracks develop on the top surface of the left-hand fuel tank's primary fuel pump module flange, allowing liquid fuel and vapor to escape. Owners report a strong fuel smell - most obvious after parking a full car in a closed garage - and in worse cases fuel dripping onto the ground beneath the left rear of the car. The flange sits on top of the tank, so the leak is invisible without lifting the car, and the smell is often blamed on the evaporative system or the filler neck. Because the leak point is above the fuel level, the odor and drip typically appear when the tank is more than half full, and a check engine light may set when the level drops below half. This is a fire risk and GM established Special Coverage 17469 with unusually long terms - 10 years or 120,000 miles from the in-service date, regardless of ownership.

On the 2014-2019 Chevrolet Corvette, the C7 Corvette with the 7-speed manual or 8-speed automatic (the 8L90 automatic arrived for 2015; 2014 automatics used the 6L80 six-speed) can develop an annoying driveline vibration/shudder at low speeds, particularly during gentle acceleration from a stop. The 7-speed manual uses a dual-mass flywheel that can develop chatter. The 8-speed automatic (8L90) shares the torque converter shudder issue with GM trucks. The transaxle-mounted differential and half-shafts can also contribute to vibrations.