161 TrueDelta members own (or used to own) a 2009 Pontiac G8. 41 of these members
(25.5%) have reported engine repairs for their car.
A total of 70 engine repairs to 2009 Pontiac G8s--an average of 0.4 per
vehicle--have been reported.
Valvetrain noise at cold start. No longer making the noise
Fuel pump located in gas tank. Had to get a tow and a rent a car.
E-VAP code so I replaced the gas cap. An OEM pontiac G8 8 cap.. Check Eng. light was out (Off) in less then a minute.
Mass air flow sensor failure
Engine running rough, camshaft lobe and bearing pitted and galled on cylinder 7. Replaced camshaft and bearing.
Engine light coming on. Fuel cap replaced. It was leaking pressure and making the system think the cap was off.
Three times early on had car in shop for a rough idle. Ultimately told this is just how the 6-liter V8 idles.
Rear main plate / main seal was small motor oil leak. Widely known issue with Generation IV "small block" engines. TSB Technical Service Bulletin exists for problem with solution & parts.
Check engine light for fuel evaporative emissions. Faulty connection to fuel tank, fuel tank replaced. Compass in mirror intermittently reversing north and south readings. Rear view mirror replaced and issue resolved.
Check engine light, vacuum test determined leak and smoke test pinpointed at faulty gas cap. New gas cap installed and issue resolved.
Check engine light, came up evaporative emissions related. Dealer said it was a current code, but could not find a leak. Reset light and has not come back since.
Check engine light for evaporative emissions. Could not replicate problem, code was a history code and not presently happening. Reset and has not come back on yet. Same issue in July '09.
Check engine light came on, gas cap was bad and replaced (2nd replacement since new).
Check engine light due to faulty gas cap, new style cap ordered.
CEL on at approx 24000 mi while on extended trip. OnStar diagnostics advised continue driving for a week or so. After 1000 mi over 6 days, CEL still on. At dealer, found DTC P0442 (evap leak); smoke test ok, but cleaned filler cap gasket.
Taken to dealer with vibration complaint at highway speeds, only apparent during AFM 4-cylinder operation. Engine mounts replaced, problem solved.
Reflashed computer for a better shifting transmission.
Oil pan leak. Warranty covered
oil pan leaking from rear of pan
The oil pan was leaking I had to wait about one month for the part to arrive but was still able to drive the car.
After I had the oil pan resealed, I rechecked it and a block above the pan was leaking.
Oil pan leaking they fixed it and within weeks it was leaking again and they just gave me the run around saying it wasn't the pan. Finally they just resealed the pan.
The key would not stay locked in and the fob was falling apart.