Lifter noise at start up. Dealer could not duplicate.
ECM/TCM update flash.
Rear main oil seal leak. This was likely from when the engine had to have a new camshaft installed 2.5 years ago @ 4800 miles, prior to us owning the vehicle.
Required reprogramming the computer.
Had the motor mounts replaced under warranty to fix a vibration when it went into cylinder deactivation mode.
Reflashed computer for a better shifting transmission.
Oil pan leak. Warranty covered
Replaced belts and tensioner assemblies for both serpantine belt and ac belt due to squeaking.
Oil pan was porous
P0521 - oil pressure sensor out of range
A/C belt fell off the pulley. Replaced pulley and belt. Only happened this one time but I've read of it happening to others. There is an updated system with 2 pulleys, but too expensive at $350 for just the parts.
Replace idler pulley and serpentine belt
Throttle body malfunction caused a Check Engine message, along with reduced power for a short distance. Drove the car to the dealership. Dealer gave me a loaner, replaced the throttle body, and I got the car back the next day.
Replaced two motor mounts and transmission mount.
AC drive belt broke. I had dealer replace both belts.
Engine damper at front of crank went bad, was wobbling making noises in serpentine belt. Told if it was not addressed engine bearings could go bad.
Radiator connection to the hose broke and new radiator was put in the car.
Replacement of A/C belt and tensioners along with 100k scheduled maintenance. The belt was half broken and that had damaged the tensioners.
No oil pressure at cold start and idle speed. Would build normal pressure at higher RPM or warm start. Found broken timing chain tensioner and scored oil pump gears. Replaced timing chain, chain tensioner and oil pump.
Previous problem (oil pump failure) was caused by one worn camshaft lobe/lifter putting metal into the engine. A tapping noise developed 2 weeks after the oil pump repair and the cam/lifters were replaced
Lower mufflers failing (loud droning). Replaced with performance tubes (mufflers not replaced). Cost shown is the labor to remove old mufflers and weld in new pipes. Doesn't include price of new pipes.
Code P0455 gross evaporative emissions leak. Gas cap was repaired by dealer out of warranty as a free fix through GM. The gas cap was replaced.
Check engine light kept coming on. Fuel cap replace,problem resolved.
The engine had a flattened cam so it had the cam and lifters replaced.
EVAP solenoid and canister failed, were replaced
Actual Fuel Management showing initial signs of failure required top end rebuild and cam-swap.
Oil leaking near rear main seal. Dealership put dye in and the car will be checked with blacklight to determine source of leak.
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.
Lifters replaced at 22000 miles. Started failing again so i traded the car in
Fuel cap did not seal properly. New cap ordered.
Defective lifter. All lifters were replaced, as was the damaged cam shaft. GM has a TSB on this issue.
Evap canister and purge vent solenoid had to be replaced.
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.
Valvetrain noise at cold start. No longer making the noise
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.
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.
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).
Neck connecting hose to radiator broke off, causing vehicle to overheat. Replaced thermostat and hoses in addition to the new radiator.
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.
Intermittent check engine light because fuel cap kept coming loose. Fuel fill neck missing attachment to body. Dealer replaced filler neck with new part.
Oil leak. Dealer replaced oil pan gasket.
Fuel cap removes itself from the filler neck, causing a vacuum leak and setting acode that turns on the "Check Engine" light.
Car died, dealer towed. Fuel pump was replaced
kept getting check engine light, gas cap would be loose. replaced under warrenty
Oil change mechanic noticed oil stain at back of oil pan while he was doing oil change. Determined that the oil pan Gasket was causing leak. Dropped pan and replaced gasket and reinstalled. Cleaned old oil from pan. Problem fixed.
Replaced engine mounts with upgrade design to eliminate vibration during AFM operation.
Minor oil leak at rear of engine, trans dropped to inspect rear main seal.
P0601 OBDII CEL. Comm error. Replaced ECM with new one. Issue resolved.
Failing AFM lifter on L76 V8 cylinder 2 needing replacement, all lifters replaced, baffles added to oil pan as part of TSB repair. Oil and coolant replaced at same time.
Check engine light came on (solid, not flashing). Problem determined to be emissions-related, and was diagnosed as a flawed gas cap. Part ordered. Problem code cleared.
Gas cap ordered from last repair trip was installed.
Check engine light was diagnosed as a faulty evap canister. Part needed to be ordered. Previous evap canister problem was fixed by replacing the part.