2021 GMC Yukon fuel system problems

Filed Oct 28, 2026 · Fuel system · NC

While stopped in a parking lot. I returned my vehicle to drive home, and the car would not start. I had it towed to the dealer. They did a diagnostic inspection for "crank-no-start ". Two trouble codes: P0340 intake single camshaft ignition sensor circuit and P00C6- fuel rail pressure load during engine cranking. Performed diagnostic checks and suspect a broken timing chain and timing tensioner that causes the bottom of the engine to free spin while the top 0.5 does not. These engines are known as interference engines, and anytime there is a mismatch between the top 0.5 and the bottom 0.5, there is the potential for catastrophic failure due to the design of the valve train and bottom 0.5 of the engine. The technician suggested a full engine replacement. I went to the dealer and spoke with the Service Manager, Greg, and he stated that he would reach out to GMC because the VIN number was not part of the recall, although the YEAR/MAKE/MODEL is. I also reached out to GMC to open a claim. To date, I have not heard back, and they have not yet accepted responsibility for replacing the engine.

Filed Sep 21, 2026 · Fuel system · PA

My 2021 GMC Yukon has approximately 36,900 miles. On September 12, 2026, the vehicle was at an authorized GMC dealership and passed a state safety inspection. On September 19, 2026, the check-engine warning light illuminated and I returned to the dealership. The dealer performed diagnostic testing and told me the fuel pump pressure was approximately 400 PSI when it should be approximately 700 PSI. I was told the fuel pump needs to be replaced. The vehicle is currently at the dealership awaiting the replacement part: Fuel pump I was not aware of a fuel-pump failure before the warning light appeared. I am particularly concerned because this failure occurred at only approximately 36,900 miles. GM previously recalled 3,386 2021 GMC Yukons under the federal safety agency Campaign 21V‑739/GM Recall N212332040 for a fuel-pump power-control-module defect that can cause the fuel pump to fail or operate intermittently, interrupt fuel flow and potentially cause the engine to stall. My 2021 Yukon is not included in that recall and currently shows no unrepaired recalls associated with my VIN. I believe this represents a potential safety concern because inadequate fuel delivery or a fuel-system failure while driving could cause reduced engine power or an unexpected stall, increasing the risk of a crash. Given the low mileage, the dealer-confirmed fuel-pressure problem, and the existing fuel-pump-related safety recall affecting other 2021 Yukons, I am concerned that my vehicle may have the same or a related defect despite not being included in the recalled population. I believe the federal safety agency should evaluate whether additional 2021 Yukons should be included in a safety investigation or recall. I am paying out of pocket to have the fuel pump replaced and am filing this complaint to document the failure.A fuel-pump failure at only 36,900 miles is extremely concerning. I ask the federal safety agency to determine whether my vehicle has the same or a related defect and whether the existing recall population should be expanded.

Filed Aug 29, 2026 · Engine, Fuel system · OH

Took car in to have it checked for recall on engine and have oil changed to new standards with WD40 was told the engine and car was fine “just use this new oil” A MONTH later was driving and engine would not shift come to find out our transmission was going out it was replaced thanks to our extended warranty (even tho it only had 98,000 miles on it) a week after a fuel pump was out and we had to pay to replace it. There were never check engine signs and no signs of the car having failure truly it ran great until the new oil.

Filed Aug 26, 2026 · Electrical, Fuel system · MN

1. What component or system failed or malfunctioned. The Fuel Pump Module failed unexpectedly while the vehicle was being driven. Failure caused the engine to stall, resulting in a complete loss of power and mobility. Unsure if part is available for inspection. 2021 GMC Yukon have a recall N252516900, but our VIN is not included in this. Can our VIN be added to this recall please? 2. How was your safety or the safety of others put at risk? The vehicle abruptly stalled while being driven through a parking lot, causing a complete loss of power and leaving the vehicle disabled in an active traffic area. Because the vehicle could not be shifted out of PARK, it became an obstruction, creating a hazard for other drivers navigating the parking lot and increasing the risk of a collision. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. After the vehicle was towed to a local mechanic on a flatbed truck, the dealer diagnosed and confirmed that the Fuel Pump Module had failed, which caused the vehicle to stall and lose power. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? The vehicle was inspected by a local repair shot, which diagnosed the failed Fuel Pump Module. The vehicle was also evaluated during the towing process. To my knowledge, the manufacturer, police, or insurance representatives have not separately inspected the vehicle or component. 5. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? Prior to the failure, there were no significant symptoms indicating an imminent fuel system failure. When the incident occurred, the vehicle abruptly stalled, lost all power, and displayed a message indicating that the vehicle was "not in a condition to shift," preventing it from being shifted out of PARK. This message first appeared immediately following event.

Filed Aug 24, 2026 · Engine, Fuel system · IL

I was driving down the highway and all at once a bunch of different lights and emergency warnings started flashing on my dashboard and my car was almost like sputtering like it wasn’t getting the gas it needed or something. You could feel lots of movement right up front and I was forced to pull over and get towed. They said the engine would need to be completely replaced.

Filed Jul 14, 2026 · Engine, Fuel system · OH

Seems to be not accelerating properly as if the propulsion is not there. Also, when switching gears it seems as if it is slipping or missing to keep up with the propulsion. Lastly, riding with windows down on the highway alongside the concrete median, I can hear like metal clanking or rubbing against one another. Also, I get an oil change at George Ballas GMC on [XXX] and 3 weeks later truck says change oil soon. AND YES THEY RESET THE OIL LIGHT AND I DROVE IT FOR 3 WEEKS AND THE LIGHT POPPED ON!!!! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 10, 2026 · Fuel system · 59,800 miles · NY

The contact owns a 2021 GMC Yukon. The contact stated that the vehicle failed to start. No warning lights illuminated. The vehicle was towed to the dealer, where it was diagnosed that the fuel pump module needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure, and a complaint was filed. The failure mileage was 59,800.

Filed Jun 25, 2026 · Engine, Fuel system · IN

Engine overheated and performed an emergency shutdown while driving through Atlanta on my way to vacation with my family. We lost propulsion and had to cross 5 lanes of traffic to find a shoulder to pull over to. The engine shut down and we were left stranded 500 miles from home with our 3 children in a boiling car. The vehicle was inspected and passed the recall test 6 weeks prior to this incident. After the first failure we attempted to extend our power train warranty to which we were told it had too many miles by GM. The GM dealership and service center where the vehicle was towed confirmed the engine needed to be replaced and GM confirmed it falls under their extended warranty. However, GM refuses to cover any additional expenses incurred from their engine failure.

Filed May 20, 2026 · Engine, Fuel system · OH

I was driving in the left lane on [XXX] , a 4 lane interstate just outside of Cleveland when i lost engine propulsion. Engine RPMs dropped to under 1000rpm, and quit responding to throttle. I had to change lanes and coast until there was a shoulder available to stall out at while i awaited a tow. No warning lamps until i tried to restart vehicle. Engine cranked but wouldnt start. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Apr 20, 2026 · Fuel system · 200,000 miles · NJ

The contact owns a 2021 GMC Yukon. The contact stated that while driving at an undisclosed speed, the vehicle shuddered. The message to restart the vehicle was displayed. The contact stated that the vehicle shut off unexpectedly. Additionally, the check engine warning light was illuminated the day before the failure. The contact stated that while attempting to start the vehicle, the failure reoccurred. The vehicle was taken to Auto Zone and diagnosed with a fuel pump control module failure. The contact was made aware of an undisclosed recall. The contact was referred to the dealer for assistance. The vehicle was not repaired. The vehicle was later towed to the dealer, where it was diagnosed with a failed fuel pump control module. The contact was informed that the fuel pump control module needed to be replaced. The vehicle was not repaired. The contact referenced an unknown recall with a similar failure; however, the VIN was not associated with a recall. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to contact the federal safety agency Hotline to report the failure. The failure mileage was approximately 200,000.