Chevrolet Silverado 2500 fuel smell problems

Filed Feb 9, 2026 · Fuel system · FL

Engine started pouring fuel out in large quantities coating the entire chassis. I was lucky, I had planned to go fishing early but had boat issue. Had I gone early in the dark it would have been catastrophic. Large amounts of gas. Pouring out. I'm lucky, when moving the truck my wife noticed the fuel was leaving a trail down the road and started screaming. I immediately parked the vehicle and I am waiting on support to get to dealer. The fuel system is a known defect on 2025/2026 Silverado but not yet identified for this HD 2500 with same 6.6l engine. Entire cab is full of gas fumes. This was extremely scary.

Filed Oct 23, 2023 · Engine · 51,000 miles · MI

The contact owns a 2022 Chevrolet Silverado 2500. The contact stated that while driving at an undisclosed speed, he smelled a fuel odor throughout the vehicle. The contact then stated that upon inspecting the vehicle, he noticed that fuel was leaking from the exhaust and smoke came from the front driver’s side of the vehicle. No warning light was illuminated. The vehicle was taken to the dealer where the cause of the failure could not be determined. The vehicle was not repaired. The manufacturer was notified of the failure but had not received a call back. The failure mileage was approximately 51,000.

Filed Aug 15, 2023 · OH

In 2017 the truck started making a slight ticking sound from the engine so I asked the mechanic about it when I got the oil changed and he said it was a valve problem the GM had no fix for yet. Over time the ticking got louder so I took it back to the dealership last year and the noise as it turns out was from the exhaust manifold bolts breaking off and the exhaust is leaking into the cab. I contacted GM and could not get them to pay for the repairs. After doing an internet search I found out that this is an ongoing problem with these trucks. This is a safety issue and GM needs to fix the problem. the federal safety agency made GM do a recall on the 2019 Buick Enclave because of a possible exhaust leak under the floor and I believe GM should be forced to do a recall on these trucks considering the exhaust fumes are coming out directly in front of the drivers compartment.

Filed Feb 18, 2022 · Engine · NY

When engine is cold you can smell exhaust fumes . Studs in engine are broke. smelling fumes is not a safety issue ? One other thing the battery distribution block was bad and GM knows its bad, they built a new . The truck shuts off wile driving, or does not start till you hit it with a hammer.

Filed Dec 15, 2021 · Fuel system · CA

Starting smelling gas inside of the cab, at first thought it was non-issue, but the smell persisted. Several days passed, and when I went to warm up my truck in the morning smelled a strong gas odor, and when I looked under the engine - there was a pool of gas, and gas was leaking. Took it in to the dealership (thinking it was a simple loose filter line) but they now say that it is more than that. Not sure if this has been a re-occurring issue with these new trucks, but it could have been a very dangerous situation.

Filed Nov 27, 2019 · Electrical, Engine · 99,985 miles · GA

I have several dtc codes u029d u029e p0420 p220b on three occasions. These code are triggering a limited speed and possible power reduction. The dealer ship states that gmc protocol is to replace one sensor at a time and let the customer go so they can breakdown again. The part that is failing I am told is the diesel particulate filter, but gmc can not supply the dealerships with the high demand. This seems like a faulty design that may work during the warranty period, but shorty fails after. I did report exhaust smell in the truck while driving . I was given a report and a large repair bill only to breakdown in 126 miles.

Filed Feb 16, 2019 · 25,000 miles · SD · 1 injury

I purchased my truck brand new. I love this truck but I feel like there might be a problem or something going on. My vehicle was in motion when this started. I was driving on 02-16-2019 with my brand new baby girl just 7 weeks old when suddenly something started to smell really toxic and it filled the entire truck with what smelled like diesel fumes. Smells like someone dumped 10 gallons of fuel inside my truck. There is no safe place to pull over and it is freezing outside. My baby is screaming and getting exposed to these nitrogen dioxides in large amounts and breathing it in. My baby's clothes and blankets smell like fuel, my clothes smell like fuel. My seats smell like fuel. The inside of my truck is poisoning my beautiful daughter and now I am panicking because there is no safe place to pull over. I drove for 20 more minutes before I found a safe place to pull over. I called a friend to come get my baby. I continued to drive the truck home. I think baby is ok because I got her out right away. I have been sick ever since. My head hurts and I can not talk right. I don't feel good. I called the customer service number 1 800 222 1020 and they told me to go to the local dealership for help. When I arrived they told me that they could not help me because it was saturday. They left me stranded. I have always loved chevy trucks and have been a loyal fan and long time customer but this incident could have killed my daughter if I had not been so close to town. I will never ever feel safe in that truck again. Even if chevy does fix it. This was the scariest thing that has ever happened to me.

Filed Jan 8, 2019 · Engine · 40,000 miles · FL

Exhaust manifold bolts are broken off on both sides of the 6.0 engine, causing exhaust fumes in the passenger compartment when I driving the vehicle. I have owned this vehicle since new and have never had any engine work done to this vehicle.

Filed Apr 18, 2017 · Fuel system · 74,500 miles · WY

Fuel line leak. Two steel fuel lines were rubbing against each other causing a fuel leak. This is a diesel pick up and the fuel system is reported at 28,000 psi operation pressure. This resulted in a leak of diesel fuel that sprayed onto the exhaust system, which can reach temperatures in excess of 1400f causing a fire hazard. The problem manifested as a strong raw fuel smell in the cab causing an inhalation hazard. This was followed by small stains in my parking spot. The smell was not evident when in motion on the highway only when stopped and running. Repairs were made by casper gmc dealer in casper, wy replacing the fuel lines. There is no buffer (such as a teflon bushing) to insulate such effects.

Filed Mar 31, 2016 · Fuel system · TN

Serious risk of fire: this model has an pressure sensor on top of the gas tank (and fuel pump) that when it malfunctions causes strong fuel odors and fuel to escape from the tank and run down the frame and out near the back bumper.