Chart based on 17 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Lifter noise at start up. Dealer could not duplicate.
12000 mi
Required reprogramming the computer.
36000 mi
Had the motor mounts replaced under warranty to fix a vibration when it went into cylinder deactivation mode.
30000 mi
Oil leaking near rear main seal. Dealership put dye in and the car will be checked with blacklight to determine source of leak.
1000 mi
Reflashed computer for a better shifting transmission.
24000 mi
US $90
Oil pan leak. Warranty covered
56000 mi
US $350
Replaced belts and tensioner assemblies for both serpantine belt and ac belt due to squeaking.
24580 mi
Oil pan was porous
25820 mi
P0521 - oil pressure sensor out of range
58700 mi
US $160
Check engine light kept coming on. Fuel cap replace,problem resolved.
15000 mi
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.
44000 mi
US $2400
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.
94000 mi
US $550
Radiator connection to the hose broke and new radiator was put in the car.
103000 mi
US $1250
Replacement of A/C belt and tensioners along with 100k scheduled maintenance. The belt was half broken and that had damaged the tensioners.
65000 mi
US $500
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.
65700 mi
US $1700
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
67000 mi
US $450
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.
30000 mi
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.
85000 mi
US $30
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.
154700 mi
US $180
Replace idler pulley and serpentine belt
53000 mi
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.
65000 mi
US $1000
Replaced two motor mounts and transmission mount.
74000 mi
US $303
AC drive belt broke. I had dealer replace both belts.
68000 mi
US $960
EVAP solenoid and canister failed, were replaced
35300 mi
The engine had a flattened cam so it had the cam and lifters replaced.
20000 mi
Intermittent check engine light because fuel cap kept coming loose. Fuel fill neck missing attachment to body. Dealer replaced filler neck with new part.
21300 mi
Oil leak. Dealer replaced oil pan gasket.
14000 mi
Valvetrain noise at cold start. No longer making the noise
6150 mi
Fuel pump located in gas tank. Had to get a tow and a rent a car.
23000 mi
US $20
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.
6000 mi
Mass air flow sensor failure
35000 mi
Engine running rough, camshaft lobe and bearing pitted and galled on cylinder 7. Replaced camshaft and bearing.
9000 mi
Engine light coming on. Fuel cap replaced. It was leaking pressure and making the system think the cap was off.
20000 mi
Three times early on had car in shop for a rough idle. Ultimately told this is just how the 6-liter V8 idles.
12000 mi
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.
5500 mi
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.
6000 mi
Check engine light, vacuum test determined leak and smoke test pinpointed at faulty gas cap. New gas cap installed and issue resolved.
8000 mi
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.
19000 mi
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.
55000 mi
US $240
Check engine light came on, gas cap was bad and replaced (2nd replacement since new).
100700 mi
US $600
Neck connecting hose to radiator broke off, causing vehicle to overheat. Replaced thermostat and hoses in addition to the new radiator.
6200 mi
oil pan leaking from rear of pan
9000 mi
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.
14000 mi
After I had the oil pan resealed, I rechecked it and a block above the pan was leaking.
17000 mi
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.
21000 mi
The key would not stay locked in and the fob was falling apart.
10000 mi
Check engine light due to faulty gas cap, new style cap ordered.
25000 mi
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.
35000 mi
Taken to dealer with vibration complaint at highway speeds, only apparent during AFM 4-cylinder operation. Engine mounts replaced, problem solved.
1000 mi
ECM/TCM update flash.
23500 mi
broken lifter
47000 mi
Lifters replaced at 22000 miles. Started failing again so i traded the car in
26000 mi
US $100
Fuel cap did not seal properly. New cap ordered.
36000 mi
Defective lifter. All lifters were replaced, as was the damaged cam shaft. GM has a TSB on this issue.
83000 mi
US $600
Evap canister and purge vent solenoid had to be replaced.
930 mi
Car died, dealer towed. Fuel pump was replaced
36000 mi
kept getting check engine light, gas cap would be loose. replaced under warrenty
25300 mi
ECM replaced due to car going into reduced power mode and shutting down engine
24180 mi
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.
8460 mi
Minor oil leak at rear of engine, trans dropped to inspect rear main seal.
19000 mi
P0601 OBDII CEL. Comm error. Replaced ECM with new one. Issue resolved.
31000 mi
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.
9000 mi
Fuel cap removes itself from the filler neck, causing a vacuum leak and setting acode that turns on the "Check Engine" light.
19000 mi
Replaced engine mounts with upgrade design to eliminate vibration during AFM operation.
14000 mi
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.
15000 mi
Gas cap ordered from last repair trip was installed.
17000 mi
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.
38000 mi
US $4000
Actual Fuel Management showing initial signs of failure required top end rebuild and cam-swap.
See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how
frequently 2009 Pontiac G8 problems occur, check out our car reliability stats.
