2022 GMC Sierra 1500: sudden loss of power

Filed Oct 8, 2026 · Fuel system · FL

Fuel pump module went out while driving on expressway engine had reduced power maximum speed uphill was 10 mph vehicle drove fine when on flat ground. Extremely unsafe spot to not be able to accelerate.

Filed Sep 16, 2026 · Engine · TN

At around 1,500 miles the truck reduced power. I was able to drive it to the dealership. The dealership reported the lifters had failed and it would be 5-6 months to repair because of the parts shortage.

Filed Sep 12, 2026 · Fuel system · MD

I am filing this complaint regarding a potentially serious safety defect involving my 2022 GMC Sierra 1500 Denali four-wheel-drive with the V8 5.3 engine. The vehicle had approximately 28,786 miles at the time of the incident. While traveling on an interstate highway in heavy traffic, my truck suddenly lost engine power. I was extremely fortunate that I was able to maneuver through traffic and get the vehicle onto the shoulder without being struck by another vehicle. A sudden loss of engine power under these conditions could easily have resulted in a serious or fatal collision. Immediately follow the incident Onstar detected diagnostic trouble code P129F The vehicle was subsequently taken to an authorized GM dealership. The dealership diagnosed the problem and replaced the fuel pump power control module to repair the vehicle. I have since learned that General Motors issued service bulletin 24 –NA-139 concerning this condition. The bulletin specifically includes 2022 GMC Sierra 1500 vehicles and identifies loss of power stalling and DTC P129F among the possible symptoms. GM states the condition may be caused by an internal short in the K111 fuel pump driver control module/fuel pump, power control module. I am particularly concerned that GM has been aware of this potential failure condition since at least 2024. A failure capable of causing a vehicle to suddenly lose engine power while traveling at Internet speeds presents amsafety hazard not only to the occupants of the affected vehicle but also to surrounding motorist. I respectfully request that the federal safety agency review this issue including other owner complaints involving error code P129F, fuel pump power control, module failures, stalling, or sudden loss of power in affected GMC Sierra and related to GMC vehicles and determine whether a safety defect investigation or recall is warranted. Vehicle: 2022 GMC Sierra 1500 Denali four-wheel-drive Engine: 5.3 L V8

Filed Sep 7, 2026 · Acceleration, Electrical · TX

P2101 Reduced Engine Power Idle instabilitystruggling to idle correctly, hunting/surging slightly, and possibly going into reduced-power protection mode. While driving engine reducing power, struggles then surges forward. Ive taken it to GMC however the techs say they have to experience the situation themselves and are unable to diagnose

Filed Aug 31, 2026 · Engine, Transmission · 12,000 miles · MN

The contact owns a 2022 GMC Sierra 1500. The contact had experienced several catastrophic failures with the engine and transmission. The contact stated that while driving 40 MPH, the vehicle shut off without warning, and lost power. The vehicle was towed to a dealer for an engine replacement. On another occasion while driving 65 MPH, the vehicle shut off without warning and the wheels locked up. The vehicle was towed to GMC of Rochester (4646 E Frontage Rd, Rochester, MN 55901), where a second engine failure was diagnosed and the vehicle was repaired under an extended warranty. Upon retrieving the vehicle, the vehicle was hesitating while depressing the accelerator pedal, with the messages "Reduced Engine Power" and "Check Engine" displayed. While attempting to reverse(R) into a driveway, the vehicle became immobile. The vehicle was towed to Red Wing Chevrolet (2500 US-61, Red Wing, MN 55066), and the technician diagnosed the vehicle with total transmission failure. The contact was informed that there was heavy metal debris inside the transmission pan. The manufacturer was notified of the failure but declined to assist. The vehicle remained with the dealer. The failure mileage was 12,000.

Filed Aug 30, 2026 · Engine · WV

I bought this truck from a dealer at the end of july 2026 and it only had 27k miles on it. I got the carfax and saw all the times of service and checked that this truck was inspected and went to the new oil type, filter and cap. It also was showing it had the special warranty due to recall. So i assumed everything was good to go and the truck was relaicle. Not even 18 days later and less than 800 miles I broke down mid drive. I was traveling at 45 mph and lost all power and almost caused an accident trying to get over and parked safely. There was no warning light or indication of it breaking down or having a mechanical issue. It went to the dealer and they diagnosed it as complete engine failure due the issue GM is having currently. They did order a new motor and it took two weeks to get in but they are in the process of the engine swap as we speak. I am sure i will get more details this week....but I am concerned now amd honestly wish I wouldnt have bought this truck considering I am seeing reports of new motor swaps having catastrophic engine failure two or three times. So at this point im in limbo waiting for the new install and hopefully it doesnt fail again

Filed Aug 26, 2026 · Engine · TN

The vehicle’s engine suffered a catastrophic failure and locked up while in operation. The engine is still installed in the vehicle and is available for inspection upon request. The engine suddenly locked up while I was driving, causing the vehicle to lose power and become disabled in traffic. I was forced to get the vehicle out of the flow of traffic and have it towed to a safe location. The sudden engine failure created a significant safety risk to me and other motorists, particularly because the failure occurred while the vehicle was being driven. Yes. Integrity Buick GMC in Chattanooga inspected the vehicle and confirmed that the engine had locked up. Only the dealer. No.

Filed Jul 29, 2026 · Transmission · NC

My truck is at the dealership for a failed transmission valve body. I was doing some research on this issue and saw recall N242454441. I asked the service writer about this and he said my truck was not covered by the recall. I had all of the same issues as described in the recall. effects can cause harsh shifting, setting a service engine soon message, reduced engine performance or P0747 diagnostic trouble code. I was driving along when the check engine light came on then a message on the dash said reduced power mode. I barely made it to work then called the dealership and told them I was bringing it in if I could make it. When I tried to take it to the dealership the rear wheels seemed to be locked up when in drive but would move in reverse. After coasting forward in neutral then reversing the wheels seemed to unlock in drive but then I didn’t have reverse. I have the same drive train with the 10 speed transmission. I think this recall needs to be expanded to include my truck as well as countless others for this known issue.

Filed Jul 26, 2026 · Fuel system · GA

While driving enroute to a concert in [XXX]., in the passing lane on [XXX] around [XXX] & just before exit 22(mile marker 21) during rush hour on 7-23 at 5.09pm, my truck abruptly lost power and shut off! It would not start, I could not engage "N" from "P" to attempt to push my truck to the far left side of the highway. This was a "VERY DANGEROUS" situation as I could have been rear ended or much worse! I immediately called SOS/ON STAR for assistance. In the meantime, a police officer and state troopers showed up to divert the traffic around my truck. Eventually, a "HERO" vehicle showed up and at the direction of the police, my truck was "DRAGGED" from the passing lane to the emergency lane. As for getting a tow truck, 1 finally showed up after 5+ hours. I found out the you all have a contract with "AAA", which is the worse when it comes to getting any assistance. I was towed back to [XXX] to South Town GMC dealership & arrived at 11.25pm. It was only the next morning that I received an email from OnStar dated 7-23 at 5.07pm, with an "Advance Diagnostics" advising of a critical issue with the engine & transmission. The code was: P129F, which is the fuel pump and/or module. My truck now sits at the dealership with a dead battery, waiting for them to address. I have heard that there are issues and recalls in certain vehicles with this similar issue. I do have "extended warranty" protection thru Ally that I bought. However, the shock is finding out that the only way to get it into "N" is a special dealer tool that goes into the transmission under my truck! Are you SERIOUS??????? To have no ability to put my truck into "N" is not only unacceptable, but extremely dangerous. Especially with what happened to me & my family. At this point, I am at the mercy of my dealership to find the time to address this issue. Until then, I have no transportation & very upset with the stress of all that happened! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B

Filed Jun 5, 2026 · Engine, Fuel system · NV

On November 20, 2025, my 2022 GMC Sierra 1500 AT4 equipped with the 3.0L Duramax diesel engine began experiencing intermittent engine overheating conditions. Concerned about a potential safety issue, I contacted a GMC dealership and was advised that because no diagnostic trouble codes were present, there was nothing to diagnose or repair and that I should continue driving the vehicle. Over the following months, the overheating condition continued intermittently. On May 24, 2026, while driving on the highway, the vehicle suddenly overheated, displayed fault code P1098, and entered reduced power ("limp mode"). The vehicle lost normal performance and acceleration while traveling in traffic. This created a significant safety hazard because the vehicle was unable to maintain normal highway speeds, increasing the risk of a rear-end collision or other traffic accident. The loss of power occurred while driving and without sufficient warning, leaving the vehicle unable to safely perform as expected in highway traffic. After researching this issue, I found numerous reports from other GMC and Chevrolet owners describing similar overheating, coolant control valve, thermal management system, and P1098-related failures. Many owners report symptoms involving engine overheating, reduced engine power, and limp mode operation while driving. I am concerned that this may indicate a broader defect involving the vehicle's cooling system and thermal management components. The vehicle exhibited overheating symptoms for approximately six months before the final failure occurred. Additionally, I understand that certain GM vehicles have been subject to service actions involving coolant control valves and thermal management system components. Given the similarity of symptoms, I am concerned that the overheating condition reported in November 2025 may be related to the same type of failure mechanism, yet my vehicle has not been included in any recall or special coverage program.

Filed Apr 30, 2026 · Engine · NH

I own a 2022 GMC Sierra 1500 AT4. The vehicle developed a clear engine knocking noise. I first brought the vehicle to the dealership while under 150,000 miles for inspection related to a recall. The dealership only performed a computer scan and oil change and stated no issue was found. No mechanical inspection was performed despite the noise. The issue continued and worsened. I returned to the dealership and the vehicle was kept for three days. During that time, the dealership again denied the existence of the noise and stated the vehicle was operating normally. When I picked up the vehicle, I immediately noticed the same noise and requested the technician to inspect it again. At that time, the technician acknowledged the noise and confirmed it was related to the recall. Despite this acknowledgment, General Motors declined to repair the engine and closed the case, offering only partial assistance toward purchasing a new vehicle instead of fixing the defect. The failure to properly diagnose the issue during the initial visit and the subsequent denial during the second inspection allowed a safety-related mechanical defect to worsen. This condition may result in engine failure or sudden loss of power while driving, creating a serious safety risk. The engine noise indicates a potential internal failure which could lead to sudden loss of power while driving, creating a safety risk. The initial failure to properly diagnose the issue may have allowed a safety-related defect to worsen beyond repair. Thank you [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Apr 21, 2026 · Engine · ME

I am reporting two separate stall/loss of propulsion events on my 2022 GMC Sierra 1500 Denali Limited (VIN: [XXX] ), which is subject to the federal safety agency Recall #25V274000 and GM Special Coverage XXX (L87 Engine Loss of Propulsion). INCIDENT 1 — April 16, 2026: While decelerating off a highway exit ramp, the vehicle stalled without warning. The dashboard prompted me to shift to neutral and restart. I performed a rolling restart successfully and continued driving. This stall occurred while decelerating on a highway exit ramp with vehicles traveling at highway speeds behind me. The sudden and unexpected loss of propulsion created a significant rear-end collision risk. INCIDENT 2 — April 17, 2026 (next day): While traveling at approximately 40 MPH and climbing a hill under load, the vehicle stalled a second time. The dashboard again prompted a neutral restart. This time the vehicle would not restart. All I heard was a single click from the starter, followed by a complete dash reboot. The vehicle lost all power repeatedly upon restart attempts. I was stranded on a narrow, high-speed rural road in Standish, Maine during rush hour, with vehicles passing at speed. I was in serious danger. The vehicle was towed to Weirs GMC in Arundel, Maine (the selling dealer), where it currently remains for diagnosis under RO# XXX. Both stall concerns are documented as Warranty Pay. Additional concern: Since the day after purchase (March 28, 2026), I have noticed a pronounced cold-start tick originating from the bottom end of the engine, confirmed by an independent mechanic as coming from inside the engine. This vehicle passed a Recall #25V274000 inspection on December 28, 2025 at 98,233 miles. The tick and stall events began after that inspection. I am requesting this be formally documented as a safety complaint tied to Recall #25V274000 and Special Coverage XXX. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)