I was test driving this 2017 Sierra 1500 SLT and experienced issues while braking. Issues with brakes as the vacuum level drops the brake assist decreases which meant I had to use excessive force to get the vehicle to stop. No warning light, nothing to tell me there is a low pressure brake. This could result in a fatality if a small animal or child walks/runs in front of the truck while truck is moving forward or backwards at low speeds. The dealer doesn’t acknowledge any recall on this vehicle because it isn’t noted as such with GM. I worry that all of the other recalls (4 others) may be an issue too, which include Frontal Airbags not deploying during an accident, faulty wheel sensor causes opposite wheel to engage and cause the vehicle to pull to one side, fuel leak, and child seat anchoring restraint instructions not included in the owners manual.
GMC Sierra 1500 fuel leak problems
18 of the 9,082 owner complaints about the GMC Sierra 1500 describe fuel leak, most of them for the 2018 model year.
- owner complaints
- 18
- worst model year
- 2018
- typical mileage
- 60,563
By model year
- 20183
- 20171
- 20161
- 20152
- 20141
- 20131
- 20112
- 20101
- 20081
- 20071
- 20061
- 20012
- 19991
Often reported together
Fuel smell 5Fuel pump 4Pulling 1Fuel gauge 1Engine failure 1ABS 1
What owners say
This vehicle has 88400 miles, it out of warranty, which I know this, I use amsoil asm sig series syn sae 0w-20 , 5.3l gas. Two years ago, I changed oil at richard buick gmc in dayton, oh and sent a sample of the oil to oil analyzers for an analysis, they set it back, it showed there was a level 4 severe gasoline in the oil. They changed the high speep fule pump, both in jectors, and it thought it was fixed, on 12 - 11 -24 had the oil changed at local boys service center, sent a sample of the oil-to-oil analyzers and recieved back, a severe fuel leak of gasoline in the oil, I don't think that many drivers who have this vehicle know about this dangerous problem, it could cause an engine failure or even worse, general motors needs to fix this perblem.
The contact's son owns a 2014 GMC Sierra 1500. The contact stated that when his son parked and exited the vehicle, there was an abnormal gasoline odor coming from the rear of the vehicle nearby the location of the fuel tank. The contact stated that he had checked the vehicle and noticed that fuel was leaking from the top of the fuel tank. The contact saw a streak of gasoline on the side of the fuel tank. The contact stated no warning light was illuminated. The contact had taken the vehicle to an independent mechanic who diagnosed and determined that the fuel pump was leaking and needed to be replaced. The vehicle had not been repaired. The manufacturer had been informed of the failure. The contact researched online and related the failure to Technical Service Bulletin Number: 14858 - High Pressure Fuel Pump Possible Leak (Fuel System, Gasoline). The failure mileage was 60,563.
Gas leak. My 2018 gmc sierra 1500 has been giving me two codes for evap leak small and large and i notice a black spot on my drive way under the gas tank wich in fact was gas. I can see the gas tank is wet but it comes from the top part of the gas tank. I been looking for recalls on this but there isnt any for this specific year of GMC sierra 1500 slt.
Truck has just over 150k miles. Maintained well and garaged when possible. 1) Noticed a fuel smell from the driver side door area and after parking for a long weekend, a small pool of liquid formed in front of the driver side rear wheel. It was fuel dripping from the line leaving the evap canister that had rusted through. Resulted in a $600 repair to replace all rusted fuel lines so as to eliminate the risk of fire. 2) When approaching an intersection to make a left turn and slowing down the brake pedal pushes to the floor with no stopping power at all. Used the engine/trans in manual mode to slow the truck down and avoid an accident. Driver side brake lines are blown out in multiple spots near the ABS module due to corrosion. Potential cost based on research is in the $1000 ballpark. This level of rust on critical vehicle components is irresponsible and potentially deadly. GM needs to take this more seriously and realize that their cost-cutting measures are putting people and their families in grave danger.
I am a mechanic by trade and I noticed on 10/28/21 that gas was leaking from my truck's fuel pump. So I ordered a new fuel pump and prepared to install it last weekend. After removing the fuel tank it became obvious that I had a more serious problem with my truck. First, the fuel leak was from a rusted out fuel pump pressure line (on the actual fuel pump). This, in and of itself could have caused a fire as it was probably spraying gas directly onto the muffler! But then I find something much worse...the Fuel Tank Support Bar was completely rotted out! The Fuel Tank Support bar is part of the frame that hold the gas tank in place!! I guess I should be happy that it had a gas leak because if it hadn’t, the gas tank could have easily fallen out while I was driving it & could have killed both my wife & I! The truck is only 8 years old and I was shocked to see it in this condition. I have worked on cars that are over 30 years old and I have never seen this kind of rot on a frame! I purchased the truck in 2016 and I'm still making monthly payments on it! I would like to know what GMC is going to do to repair this! I have called the Dealership that I purchased it from but they were of no help. I anxiously await your reply! Thank you! [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).
The contact owns a 2011 GMC Sierra 1500. The contact stated while driving 8 mph, he started to smell fuel fumes inside the vehicle. The contact stated no warning light was illuminated. The contact stated that while inspecting under the vehicle and he noticed a fuel leak. The vehicle was not diagnosed or repaired. A dealer was not contacted. The manufacturer had not been informed of the failure. The failure mileage was 119,543.
Tl* the contact owns a 2015 gmc sierra 1500. The contact noticed a strong odor of fuel inside the vehicle and observed fuel leaking underneath the vehicle. The vehicle was taken to rotolo chevrolet (16666 s highland ave, fontana, ca 92336, (909) 333-6924) where the contact was informed that the fuel pump and lines needed to be replaced; however, the parts were not available. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 44,000.
Tl* the contact owns a 2016 gmc sierra 1500. The contact stated that the vehicle leaked fuel onto the driveway. The contact also smelled fuel inside the vehicle. There was no warning indicator illuminated. The contact called autonation buick gmc henderson at 702‑979‑2044 (located at 330 north gibson road, henderson, nv 89014) and was informed that there was no recall. The vehicle was taken to an independent mechanic who diagnosed that the seal on top of the fuel tank needed to be replaced. The technician replaced the seal. The manufacturer was made aware of the failure and offered a $100 voucher. The failure mileage was approximately 30,500.
Fuel injection seals #4 o-ring split - leaking fuel - pooling gas on manifold. Took vehicle in for smell of gas, lack of acceleration and poor gas mileage. This is known issue based on the service bulletin 18-na-137 - vehicle has less than 6000 miles
Related recalls
Fuel system, gasoline: delivery: fuel pump
- What is wrong
- General Motors LLC (GM) is recalling certain 2020 Cadillac Escalade, Escalade ESV, Chevrolet Camaro, Silverado 1500, Suburban, Tahoe, GMC Sierra 1500, Yukon, and Yukon XL vehicles. The fuel pump may be missing a pressure regulator, allowing for over-pressurization of the fuel system.
- Risk
- Over-pressurization can crack the fuel pump and cause leaks, increasing the risk of a fire in the presence of an ignition source.
- Remedy
- GM will notify owners, and dealers will replace the fuel pump, free of charge. The recall began December 18, 2019. Owners may contact Cadillac customer service at 1‑800‑333‑4223, Chevrolet customer service at 1‑800‑222‑1020, or GMC customer service at 1‑888‑988‑7267. GM's number for this recall is N192283991.
Recall number 19V837000 · Recall details
Fuel system, gasoline: storage: tank assembly
- What is wrong
- Vehicle description: crew cab pickup trucks. The front, inner corner of the fuel tank can contact the body sill either intermittently or constantly. This movement can cause a discernible noise and, over time, can wear a hole in or crack the fuel tank at point of contact.
- Risk
- This condition can result in fuel leakage and a distinct fuel odor if the tank were filled above the level of the hole or crack. In the presence of an ignition source, a fire could result.
- Remedy
- Dealers will inspect the fuel tank for wear and, either install a spacer between the fuel tank and the front crossmember, or if necessary, replace the fuel tank.
Recall number 98V187000 · Recall details
Questions about the GMC Sierra 1500 fuel leak
Which GMC Sierra 1500 years have fuel leak problems?
The model years with the most reports are 2018 (3 complaints), 2001 (2 complaints) and 2011 (2 complaints).
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