This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.
full bulletin at NHTSA ↗2005 Pontiac G6 fuel system problems
moderate 11 complaints filed with NHTSA · avg repair $1,200 · see fuel system across all vehicles →
Failure mileage
Complaints
11
Recalls
0
Avg fix
$1,200
What stands out
Among the 5 model years of Pontiac G6 in our records for fuel system problems, this one ranks #3 by owner-complaint volume.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering fuel system on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This Preliminary Information communication provides information to the technician about engine block of possible cylinder bore damage, scoring or out of round as the possible cause of engine oil consumption, misfire, cylinder leakage or blow by. Technician will need to inspect the engine for Cylinder damage or scoring, An out of round cylinder bore, Dirt intrusion, and Catalytic Converter failure.
full bulletin at NHTSA ↗This Preliminary information communicates the use of Winter grade fuel during the warm months of 2020 and the potential rivability issues that it can cause. The ongoing Coronavirus (COVID-19) pandemic has caused significant reductions in driving and fuel use. Due to the surplus of winter grade fuel sitting in storage (pipelines/stations) the EPA is waiving the fuel vapor requirement. This will extend the use of winter fuel into the summer months. The drivability concerns should not be single events but should be multiple occurrences associated with hot days.
full bulletin at NHTSA ↗This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
full bulletin at NHTSA ↗This informational bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners report a cracked plastic elbow fitting on the fuel pump module assembly that leaks gasoline onto the top of the fuel tank, creating a serious fire risk. The problem appears across vehicles with 63,000 to 137,000 miles. Strong gasoline odors fill garages and surround the vehicle; owners have documented fuel pooling on the tank itself. One owner's grandmother ran a high-heat kiln in her garage while the leak persisted undetected for over six months—a genuinely dangerous scenario.
The repair is not cheap: fuel pump module replacement runs $700 to over $1,100. The plastic elbow cannot be serviced separately; the entire module must be replaced even when the pump itself functions normally.
Owners also report an unrelated hesitation and jerking problem during acceleration from a stop—four mechanics, including a GM dealer, could not diagnose it. GM's response was dismissive, suggesting the owner buy a new car rather than investigate.
One owner experienced a fuel leak that recurred after initial repair but did not pursue a second diagnosis. Owners indicate GM is aware of the cracked elbow issue based on their own research but has not issued a recall or announced the defect publicly.
Same Pontiac G6 fuel system reports on nearby years: 2007
Failure modes owners describe
Cracked/deteriorated fuel pump module elbow fitting
Plastic elbow fitting on the fuel pump module assembly cracks or deteriorates, allowing gasoline to leak and pool on top of the fuel tank. Occurs at the high-pressure fuel line connection or on the exterior of the fuel pump.
When: Occurs across wide mileage range: 63,000 to 137,000 miles reported; one complaint noted leak present for 6+ months
Symptoms owners cite: Strong gasoline odor in garage or around vehicle perimeter; Visible fuel pooling on top of fuel tank; Fuel leaking from rear of vehicle or underneath; Gasoline fumes inside enclosed spaces where vehicle is parked
Repairs/costs cited: Entire fuel pump module assembly requires replacement. Repair costs cited: $700 to $1,100+. One owner reported fuel pump functioning normally but component requiring replacement due to crack.
Recalls/TSBs owners mention: GM reportedly aware of problem per owner research; no recall announced. GM customer service did not confirm warranty coverage for out-of-warranty vehicles. GM dealer response unhelpful in some cases.
Hesitation and jerking on acceleration from stop
Vehicle hesitates and jerks significantly when accelerating from a stopped position, particularly between 0–10 mph, despite proper gas pedal input. Issue unresolved after evaluation by multiple mechanics including GM dealer.
When: Reported at 63,000 miles
Symptoms owners cite: Significant hesitation and jerking on acceleration from stop; 0–10 mph acceleration takes excessive time relative to throttle input; Unsafe acceleration for highway merging, intersection crossing, or emergency evasion
Repairs/costs cited: No repair completed. Four mechanics, including GM dealer, unable to diagnose root cause.
Recalls/TSBs owners mention: GM advised owner to seek diagnosis at another dealer; offered no investigation. Representative suggested purchasing a new vehicle rather than addressing the issue.
Fuel leak recurrence
Fuel leak from underneath vehicle initially repaired by private mechanic but failure recurred. Vehicle not returned for second diagnosis or repair.
When: Initial failure at 104,000 miles; complaint filed at 106,655 miles
Symptoms owners cite: Fuel leaking from underneath vehicle; Difficulty starting; Decrease in fuel efficiency
Repairs/costs cited: Initially repaired by private mechanic; failure recurred. No second repair attempted by owner.
Recalls/TSBs owners mention: Dealer notified and filed a claim about the failure.
Synthesized from 11 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 0 most recent
Had fuel system trouble with your 2005 Pontiac G6?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the fuel system problem on the 2005 Pontiac G6?
It's a documented issue but not catastrophic. 11 complaints have been filed. Repairs average $1,200 and most owners catch it before it causes a breakdown.
At what mileage does the fuel system typically fail?
Across the 11 complaints that reported odometer mileage, most fuel system failures cluster between 70,000 and 137,000 miles, with the median around 102,000. A quarter of owners report trouble before 70,000; a quarter make it past 137,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $1,200 for fuel system repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to fuel system?
No active recalls currently cover fuel system issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2005/Pontiac/G6.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.