| 1 | 0 | 3 | 4 | 3 | 4 |
2008 Pontiac G8 repairs by problem area
Engine (20%)
Transmission and Drivetrain (4%)
Brakes and Traction Control (3%)
Suspension and Steering (34%)
Electrical and Air Conditioning (24%)
Paint, Rust, Leaks, Rattles, and Trim (8%)
Other (7%)
Chart based on 111 repairs.
2008 Pontiac G8 engine repair cost distribution
$2500+ (10%)
$1000 - $2499 (5%)
$500 - $999 (5%)
$100 - $499 (0%)
< $100 (81%)
Chart based on 21 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2008 Pontiac G8
Engine not specified
| 165000 mi US $800 |
Check engine light for air/fuel mixture...lean code |
2008 Pontiac G8 4dr Sedan
361-horsepower 6.0L V8 6-speed shiftable automatic RWD
| 16000 mi | Defective valve spring replaced. Sounded horrible, like it was having a really hard time running, as if not getting enough air. Even died on me several times (during my troubleshooting, I wasn't driving it after the initial "Check Engine" light came on). Defective valve spring replaced again the next day while visiting family, so second dealer. First dealer had left piece of plastic, approximately 2 in x 1/2 in, underneath the valve spring, causing it to bend and therefore malfunction. |
| 17000 mi | Valve spring broke, also causing the #7 intake runner to have a leak. Everything was fixed under warranty. |
| 27000 mi US $60 |
Gasket for the axle back system failed causing a severe leak and carbon monoxide(exhaust fumes) could be smelled heavily inside the car when stopped ie warming up, stop light, idling while parked. |
| 59000 mi US $3500 |
Catastrophic valve train failure |
| 5896 mi | Trans ECU reflash, bulletin #080730036 |
| 10000 mi | Evap leak indicated, check engine light cleared, has not come back in 4 weeks. |
| 11000 mi | replaced fuel cap due to EVAP leak |
| 14000 mi | looses antifreeze every 6 months or so, second time needed to refill, no leak found. |
| 47000 mi | Pulled a P0445 and P0449 code. Replaced gas cap for P0455 and replaced EVAP canister/solenoid for P0449. No issues since. |
| 4000 mi | Hesitation when taking off...fixed with transmission computer flash update. |
| 8000 mi | Engine oil leak. |
| 5500 mi | Engine replaced due to piston slap. |
| 48000 mi | Rattling cold transmission fixed with TCU and ECU update. |
2008 Pontiac G8 4dr Sedan
256-horsepower 3.6L V6 5-speed shiftable automatic RWD
| 47000 mi US $88 |
Engine light went on. Was able to quickly fix the gas cap problem. |
| 75000 mi | Engine Timing Chain. The chain was stretched and needed to be replaced. Was under warranty. |
| 79000 mi | Ignition key was worn out causing the the key to not turn to the off position to remove the key. Currently using the sapre key and have had no issues. |
| 151000 mi US $3000 |
Timing chain needed to be replaced. Second time this has occurred, last time it was under warranty at 70k miles. |
| 73000 mi | Service engine soon came on for emission issue. This was due to a faulty gas cap. This was previously replaced, but found the replacement was the INCORRECT gas cap! Dealer also cleared the service engine code. |
| 57000 mi | CEL, stretched timing chain. TC replaced by dealer. |
2008 Pontiac G8 4-door
6-cylinder automatic 2WD
| 69700 mi US $2400 |
Timing chain stretched. Timing chains replaced. |
See TrueDelta's information for all Sedans
See TrueDelta's information for all Pontiac models.
