Chevrolet Blazer fuel leak problems

Filed Apr 29, 2026 · Engine, Fuel system · SC

Re: Vehicle Safety Defect Complaint – 2023 Chevrolet Blazer To Whom It May Concern, I am submitting a formal safety defect complaint regarding my 2023 Chevrolet Blazer. This vehicle has exhibited multiple system failures that present a serious risk to driver safety and public roadway safety. The vehicle was purchased new on July 20, 2023. Beginning on April 21, 2025, at approximately 27,610 miles, the vehicle developed a progressive defect initially presenting as oil-related issues. Despite multiple repair attempts, the condition worsened and required a full engine replacement in January 2026. Following the engine replacement, the vehicle continued to experience critical safety failures, including engine stalling, reduced engine power warnings, and electronic stability control (ESC) alerts. On April 26, 2026, the vehicle experienced a driver assistance system malfunction in which it attempted to steer off the roadway. I was forced to manually disable the system to maintain control of the vehicle. On April 27, 2026, the vehicle exhibited a fuel system failure, including fuel leakage and fuel odor, along with multiple simultaneous warning indicators: • Reduced Engine Power • Service ESC • Steering Assist Reduced / Drive with Care • Power assist driver system disabled This combination of failures presents both a fire hazard and a loss-of-control risk. Additionally, I was informed by the dealership that a high-pressure fuel line, a one-time-use component, was not replaced during the engine installation. This raises concerns regarding improper repair and continued unsafe operation of the vehicle. The vehicle has undergone multiple repair attempts and a major powertrain replacement, yet continues to present serious safety concerns. Due to these ongoing issues, I do not feel safe operating this vehicle. I respectfully request that the federal safety agency review this matter for potential safety defects that may impact other vehicles of the same make and model.

Filed Dec 11, 2025 · Transmission · 157,236 miles · MS

The contact owns a 2020 Chevrolet Blazer. The contact stated that while driving at an undisclosed speed, the vehicle hesitated with a grinding sound coming from the vehicle, with the check engine warning light illuminated. The contact stated that the vehicle was jerking while driving and while accelerating from a stop. In addition, the contact noticed fuel leaking from the front end of the vehicle while the vehicle was parked at the residence. The vehicle was taken to the dealer, where it was diagnosed that the START/STOP accumulator end cap had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the federal safety agency Hotline for assistance. The approximate failure mileage was 157,236.

Filed Dec 13, 2023 · Fuel system · 29,800 miles · FL

The contact owns a 2020 Chevrolet Blazer. The contact stated that while refueling the vehicle, the contact removed the pump handle from the filler neck, and one of the fuel flappers detached. The contact was concerned about fuel leaking from the fuel tank. The vehicle was taken to the dealer, where it was diagnosed that the filler neck and fuel filler housing needed to be replaced; however, the fuel filler housing was on backorder. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 29,800.

Filed Jun 29, 2021 · Fuel system · NC

The contact's girlfriend owns a 2001 Chevrolet Blazer. The contact stated that fuel was leaking from the top of the fuel tank. There was an abnormal fuel odor detected. Additionally, the vehicle was slow to start. There were no warning lights illuminated. The contact called the local dealer however, the vehicle was not diagnosed nor repaired. The manufacturer was not contacted. The contact was concerned about the fuel odor and a possible fire. The failure mileage was unknown.

Filed May 3, 2016 · Fuel system · 143,000 miles · KY

Received a recall last october 2015 about strong gas small. Got appointment at chevy dealer to fix problem in november. Dealer says I need a gas tank,but they can't get any from company. They have other recalls also with the same problem that are waiting. Now vehicle has become hard to start. Still waiting for dealer to fix. Why does chevrolet send recalls if they have no intention of fixing the problem?? This is a dangerous situation with gas dripping, and the strong gas smell. It is a lawsuit waiting to happen if someone accidently drops a cigarette around the car.

Filed Jan 29, 2015 · Fuel system · IL

Tl*the contact owns a 1998 chevrolet blazer. The contact stated that while driving at approximately 30 MPH, the vehicle stalled without warning. The vehicle was taken to an independent mechanic where it was diagnosed that the spider fuel injection system needed to be replaced. The vehicle was repaired. In addition, the contact stated that while driving at unknown speeds, a pedestrian observed that there was a substance leaking from the vehicle. The contact discovered that there was a fuel leak. The vehicle was taken back to an independent mechanic, who confirmed that the fuel tank and fuel pump needed to be replaced. The vehicle was repaired however, the failure recurred. The vehicle was taken back to the independent mechanic, who stated that an unknown wire in the fuel pump needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was unknown.

Filed Nov 13, 2013 · Engine, Fuel system · 121,368 miles · TX

I have gas leak that come from the back of the car and that is when I get out of the blazer, and it seem to be wheel problem.

Filed Aug 22, 2012 · Fuel system · 110,935 miles · NJ

Fuel lines rusted and leaking above fuel tank. Leaking fuel lines tank area replaced both ruel lines rear of truck by chevrolet dealership at a cost of $802.69.

Filed Jul 12, 2010 · Fuel system · 42,000 miles · WA

The gas gauge on our 2007 chevy trailblazer has stopped working. This nearly caused an accident because suddenly I thought I was leaking gas on the freeway after recently filling up. The car is 3 years and 2 months old with 42,000 miles. This seems to be a common defect judging by the complaints on the internet. Chevy/gm will not provide any assistance in fixing this known defect other than charging $800+.

Filed Jan 21, 2008 · Fuel system · 130,000 miles · CO

I recently was on the way home from denver, co on the highway. I stopped for fuel noticing my vehicle was consuming more gas than usual. I fueled up and left. When I arrived home I noticed gasoline dripping on the ground. I immediately called a mechanic. My wife's father is a certified mechanic and owns his own shop in denver. He fixed the leak, but told me the leak started because the fuel lines were rubbing the transmission and showed me. To my surprise the fuel lines were not secured in their proper location. I have never had any work done to the fuel lines or even any work done in the area of the problem. So I took the blazer back home to colorado springs. About a month later I noticed the fuel smell was back. I popped the hood because I did not see any fuel leaking. The fuel was pouring out of the lines at the top of the engine where they connect to the couplings for removal of the engine. I then decided to take the blazer to a closer location for repair. This location was daniels chevrolet located in colorado springs. They told me that the o-rings were pinched and that the gasket where the fuel lines go into the intake manifold was bad. I paid them 480.60 to repair the o-rings and gasket. Four days later, the smell of fuel is back and the leak is there again at the couplings on the back of the engine were the dealership repaired them the first time. Now the blazer is back at the dealership again for the second time for the same issue. The vehicle is my wife's, but due to the problem with the fuel, I have been driving it. The fuel leaks right on top of the exhaust pipe. This is could be a very dangerous situation if the fuel were to ignite. My wife had taken the blazer to work three nights after the dealership repaired the o-rings and gasket, she had almost passed out while driving due to the fuel vapors entering the passenger compartment. Now the dealership wants to charge me again for the same repair they did. I am at wits end.