GMC Terrain fuel leak problems

Filed Sep 24, 2026 · Fuel system · NY

The contact owns a 2018 GMC Terrain. The contact stated that while the vehicle was parked in the garage at the residence, there was fuel leaking from the vehicle from the fuel line. The contact stated that the fuel pump was replaced. There was a strong gasoline odor coming from the vehicle. The contact associated the failure with the federal safety agency Campaign Number: 18V358000 (Fuel System, Gasoline); however, the VIN was not included in the recall. The dealer was contacted by phone and made aware of the failure but stated that the repair was not covered because the VIN was not included in the recall.

Filed May 23, 2026 · Fuel system · GA

Gas leaking from the hood. High pressure fuel pump

Filed May 8, 2026 · Fuel system · TX

Car reduced speed and the smell of gas filled the car. Car shut off. Check engine light came on with reduced speed. This is the second time this has happened. Gas leaked onto ground from car. Car stalls immediately while driving and does not allow you to press the gas to keep moving. Almost hit from behind on Main Street.

Filed Mar 16, 2025 · Electrical, Engine · NC

At stop light turning right, the car stalled, cut on and cut back off, cut on and back off with about 30 cars behind me. Sputtering. On the dash board it said “Engine power reduced”. I had to be pushed out a main highway by police, and thankfully my [XXX] daughter wasn’t in the back seat. I have had this car 12 days with 48256 miles on it. I’m extremely concerned with the safety of this car. And when towed was leaking gas like fluid. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 13, 2024 · Engine, Fuel system · 127,000 miles · MS

The contact owns a 2015 GMC Terrain. The contact stated that while at a complete stop, the vehicle jerked and shut off. The check engine warning light was illuminated. The contact was able to restart the vehicle and continue driving. The contact stated that on several occasions, while the vehicle was jerking at a complete stop, the contact shifted to park(P) to prevent the vehicle from stalling. The vehicle was taken to an independent mechanic, where it was diagnosed and determined that the fuel pump was leaking fuel into the oil gasket. The mechanic replaced the mass air flow sensor, the oil gasket, the fuel pump, the catalytic converter, and the starter; however, the failure recurred while driving. The dealer was notified of the failure and informed the contact that the VIN was not included in an unknown related recall. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 127,000.

Filed Nov 18, 2018 · Fuel system · 15,100 miles · IN

Leaking diesel fuel line while running, parked and in gear. Second diesel terrain fleet vehicle to leak fuel; other colleague had the same issue recently and was asked if someone cut the fuel line. Now, mine is leaking.

Filed Jul 12, 2018 · Fuel system · 68,359 miles · NY

While driving down a busy two lane road I pulled out into an intersection in an attempt to make a left hand turn when the car stalled in the middle of traffic. I turned the car off and turned it back on again and it worked. However, later that day it stalled again while it was sitting at an intersection. I brought it to the dealership for repair and they said it was not covered under warranty even though I still had one. They said there was a fuel leak at the fuel composition sensor. They replaced the sensor. Gm extended special coverage # 17097 in may 1, 2017 for 2011-2013 chevy equinox and gmc terrains that are equipped with flex fuel due to a fuel leak at the fuel composition sensor but they did not include my 2011 model terrain that is not equipped with flex fuel but it should have been. This issue was out of my control as it was a manufacturing defect in the fact that they placed the composition sensor below the frame exposing it to damage from road debris.

Filed May 1, 2018 · Engine, Fuel system · 122,000 miles · GA

2012 gms terrain 4 cylinder flex fuel- camshaft code, cam sensors replaced, spitting and sputtering, stalled x3 and shut off, fuel consumption noted, loss of power. Gmc dealership refused to perform diagnosis on my car due to my refusal to pay for ruling out the documented fuel leak recall/special coverage. My request was only to have fuel the issue looked at and ruled out, nothing further, to ensure this was not causing my problem. I reported my problems that are consistent with the noted fuel special coverage and turned away because I did not have $120 to pay if they found it was not the problem. Upon reading my issue correlates with numerous terrain and equinox owners. I want in this action to get something done for people like myself.

Filed Jun 12, 2017 · 41,400 miles · IL

I recently received a letter from gmc informing me that vehicles were built incorrectly, that the fuel composition sensor may be mounted below the frame, exposing the sensor and fuel lines to road debris, which may result in the fuel line emitting fuel odor, weeping, or leaking. In addition, the vehicle may experience engine stumble, loss of power and stall while driving. It did not provide a picture of the fuel composition sensor, nor did it provide information as to where it is located. I was told by the customer assistance center this was intentional. I am now fearful every time I drive the car, but this is my only means of transportation. I am highly concerned regarding not only the failure of the fuel composition sensor and fuel lines, but road debris, or an accident may puncture the fuel composition sensor and/or fuel lines, causing a possible fuel leak and potential fire. Add in the concern that the vehicle may unexpectedly lose power and/or stall, (my vehicle lost power on 12-13-13). I do not understand why an issue this dangerous did not result in gmc initiating a recall or field inspection of some sort to inspect all vehicles at no cost to the owners and make any necessary repairs in order to eliminate any risk of accident or injuries to the public. I have been advised by the customer assistance center that if I bring my vehicle to the dealer, the service department needs to perform a diagnosis. Once determined that the codes match the special coverage, the diagnosis will be waived and all repairs related to it will be free of charge.there will be an out of pocket expense for the diagnosis unless the condition described is met. Why does the vehicle need to be hooked up to a computer to find engine or other electrical issue codes? The letter states this is a part that may be mounted below the frame rail, so wouldn't this just require a visual inspection?

Filed Dec 8, 2015 · Fuel system · 37,000 miles · RI

I was about to switch lanes on highway from on ramp travelling aprpox 60 MPH and accelerating when my vehicle suddeling stopped accelerating & someone pulled up on my side to inform me I was leaking fuel everywhere. I lost nearly a full tank of gas on the highway. One of the men who stopped had worked on gm vehicles in the past and was able to clip something together to slow the leak. I drove to the dealership and they were no help and didn't seem to care about the issue or how serious this was for a 2 year old car with 37k miles. I was told I was out of warranty and they would not do anything for me and were going to charge me a $200 diagnostic fee. Disappointed by the poor service I received I took the car to my local mechanic who works on our other vehicle. They were shocked to see a fuel line on a 2013 vehicle break. They ordered the replacement fuel line from gm and I got my car back on 5 days later. The next day I took my car out to run errands and when returning to the vehicle I noticed a strong smell of gas, upon looking under the car I noticed that the fuel line was still leaking and from the same place! We brought the vehicle back to the shop and they immediately go in touch with gm who sent out another replacement part and also recommended also replacing the metal line as they had been seeing some issues with this line. Under the recommendation of gm the shop replaced both lines and I got my car back 3 days later. The problems I have experienced are unacceptable and could be very dangerous. Fortunately no one was hurt but had I been in the high speed lane and traveling at full speed limit when this happen I or someone else could have been seriously injured by this issue. Given the age of the car and low mileage this is not a wear and tear issue, this is 100% a defective part or mfg problem that I expect gm to reimburse $670 for repair.