2024 GMC Sierra 1500: engine failure

Filed Nov 4, 2026 · Engine · WY

**Subject: Complete Engine Seizure After GM Recall Remedy – 2024 GMC Sierra Denali 1500, 6\.2L V8** I am reporting a catastrophic engine failure involving my 2024 GMC Sierra Denali 1500 equipped with the 6\.2\-liter L87 V8 engine\. At an earlier date, my vehicle underwent GM safety recall 25V274\. The dealership performed the required inspection, changed the engine oil to 0W\-40, and installed the replacement 0W\-40 oil\-fill cap\. The truck was returned to service\. On October 31, 2026, I experienced an unexpected engine shutdown while driving\. The instrument cluster displayed “Please Restart Engine\.” I subsequently brought the truck to a GMC dealership for inspection\. The dealership reported finding nothing wrong and released the vehicle back to me\. On November 3, 2026, while driving home from that inspection, I attempted to pass another vehicle\. While occupying the passing lane, my engine suddenly failed and seized without warning\. The truck lost all engine power and began coasting\. I was forced to maneuver the disabled vehicle off the roadway and into a ditch\. I contacted OnStar roadside assistance, which located my vehicle and dispatched a tow truck\. The vehicle was transported back to the dealership, where it remains\. This engine failure occurred after completion of GM’s official recall remedy and immediately following an additional dealership inspection that found no problems\. I believe this incident warrants investigation under the federal safety agency Engineering Analysis EA26005, which concerns L87 engine failures following recall repairs\. The sudden loss of propulsion during a passing maneuver created a serious collision hazard\. I request that the federal safety agency investigate this failure and evaluate the effectiveness of GM’s recall remedy\. **Vehicle:** 2024 GMC Sierra Denali 1500 **Engine:** 6\.2L L87 V8 **Mileage at failure:** 40,035 **Final failure date:** November 3 2026

Filed Oct 29, 2026 · Engine · 110,000 miles · TX · fire · 1 injury

The contact owned a 2024 GMC Sierra 1500. The contact stated that while driving approximately 65 MPH, there were flames coming from the front passenger side of the vehicle. The contact immediately pulled over and exited the vehicle before the vehicle became engulfed in flames. The Fire Department was called to the scene and extinguished the fire. The vehicle was destroyed and later towed away from the scene. During the fire, the contact sustained a leg and back injury from falling while frantically exiting the vehicle. The cause of the failure was not yet determined. The contact stated that the engine installed at the time of the fire was a replacement engine installed after the original engine had seized and was replaced under the federal safety agency Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING). The failure mileage was 110,000.

Filed Oct 25, 2026 · Engine · MI

My 2024 L87 already had the recall done and was changed over to 0w40 oil. Driving down the road at 70 mph the engine just shut off and I had to coast to the side of the road. Checked engine codes and found p0016. Had to have the truck towed to the dealership where they replaced the engine. Clearly the 0w40 did not fix the problem.

Filed Oct 25, 2026 · Engine · CO

My vehicle has the loss of propulsion recall 25V‑274. It was in for service on 5-12-2025 with NO REMEDY YET on my paperwork. 8-6-2025 the truck was in for service and passed the test that would have required immediate engine replacement. As per the recall, I was given different oil as a remedy for a faulty engine. Despite passing the test, I still lost propulsion on 6-11-2026. I was traveling on the highway at night, crested a hill and noticed while coasting that the engine was not running and the dash said "hit the start button again." When I did this everything turned off including the lights. I was still traveling at 65 MPH without lights. Luckily I didn't panic and the lights came back on when I hit the start button again. Once the vehicle coasted to a stop; and I put it in park the motor restarted. This incident was reported on 6-14-2026, complaint number 1174-4867. When I submitted this complaint, I started that GM needs to make a change so hitting the start button when the engine has stalled doesn't turn the lights off. The vehicle was towed to the dealership, they had it for two months, put around 1000 miles on it and returned it to me with no repairs made because they couldn't reproduce the problem. They returned it to me on 7-29-2026. They did not to the engine. I radio repair was unsuccessful so it went back to the dealer that same day. 8-10-2026 Vehicle return without repairs to the radio or engine. 10-10-2026 On my second drive on the highway since having the vehicle returned to me, the engine shut off again on the highway at 65 MPH. After coasting to a stop, the engine would not restart and it was towed to the dealership. They have the vehicle and are repairing the engine. My concern is that this vehicle passed a loss of propulsion recall, still had loss of propulsion twice. I have concerns for my safety in this vehicle. I do not have confidence the current repairs will not result in another loss of propulsion.

Filed Sep 27, 2026 · Transmission · FL

I purchased a 2024 GMC Sierra 1500 Denali VIN # [XXX] on XXX with approximately 18,599 miles on the vehicle. The incidents are identified below in order. 1) XXX, Vehicle engine failure while driving at high speeds, with my daughter as a witness. I Reported the incident to Elder Ford on XXX, and my sales associate told me to take it to GMC for factory warranty. XXX took the vehicle to Central Buick GMC they performed a test that found no codes and replaced the fuel Pump Module from past experiences. They let me take the vehicle home. 2) XXX Vehicle engine failure while driving at high speeds, had to get it towed to the dealer for repair. Again, they found no codes. Had it for 5 days. Made me take it home. 3) Picked it up on XXX , was driving home and the same thing happened while going 70+ mph on the interstate. Stalled again. Drove it back to the dealer and dropped it off again, same day on the XXX. 4) Again, they found no codes and made me pick it up on XXX I was driving home on XXX and the same thing happened- lost complete power while going down the road at 40+ MPH. I had to get it towed the same day back to the dealer where it currently is at. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 18, 2026 · Engine · FL

I am reporting a catastrophic engine failure on my GM vehicle equipped with the 6.2L L87 V8 engine. This failure occurred AFTER the official recall remedy (Recall 25V‑274/ GM Recall N242494000) was performed on my vehicle, which directly aligns with the federal safety agency's active investigation under Engineering Analysis EA26005. The recall service was completed by an authorized GM dealership on XXX at 22,489 miles, the vehicle had the L87 Engine Loss of Propulsion recall completed and the PICO L87 Diagnostic Testing was completed and passed with recommended updated oil change to Mobil 1 Supercar 0W-40 (19432866) quantity 8 with 12737081 Filter and Cap Changeout. On XXX, at 26,752 miles, the engine suffered a catastrophic total mechanical failure. While driving, the vehicle experienced a sudden loss of motive power and a complete shutdown with no prior warning of any kind while driving down [XXX] at approximately 45 to 50 MPH. This created an immediate safety hazard on a public roadway. The vehicle was towed to Key GMC in [XXX] where technicians confirmed Engine Seized Up. Spun connecting rod bearings at cylinder 7&8. The vehicle was at the dealership awaiting parts for repair for 65 days due to engine backorder (engine, radiator, starter, cooling lines and miscellaneous parts ultimately replaced). Because this failure occurred after GM's official remedy was implemented, the recall clearly failed to correct the underlying safety defect. I request that NHTSB include this incident in its ongoing evaluation GM's 6.2L engine issues under EA26005. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 17, 2026 · Engine · GA

On 9-5-26 while on interstate 75 going about 75 miles per hour truck started losing propulsion and speed started dropping. No warning light or anything. Navigated over to shoulder turn truck off for about 5-10 minutes and started back. On 9-8-26 on the way from Dr. appt. starting truck up it acted like it didn't want to start but did. Eventually stopped at red light and truck died and wouldn't start. Dash board lighting up and when trying to start the engine would not turn over. No warning light or anything. Truck towed but had to drag on the wrecker due to wheels locked up. On 9-16 GMC advised engine fail and will need replacing at 12,000 miles. VERY UNACCEPTABLE FOR 2024. Truck was bought new in October 2023 with 4 miles. Found out it is a known issue with the 6.2 V8. Be careful. We could have been killed in the flow of traffic and truck losing power with no warning. Couldn't even turn hazard lights on or anything. 18 wheelers coming all around and we trying to navigate to safe spot on the shoulder when we was on the interstate. GMC need to get their stuff together, you are putting people lives is danger. GMC is feeling our anger right now. Who wants a new engine in a $90,000 top of the line truck

Filed Sep 15, 2026 · Engine · MI

I was driving my truck and I had a sudden loss of power. The engine sounded like a rattle of bolts. It was towed to the dealership and they replaced the engine.

Filed Sep 9, 2026 · Electrical, Engine · NJ

While driving on a divided two lane state highway at approximately 60mph my vehicle suffered a catastrophic engine failure causing immediate loss of power in traffic at highway speeds. I had to negotiate highway traffic to steer the vehicle onto a narrow shoulder and continue under reduced power to a location where the vehicle could remain stopped safely. There were no warning signs and no warning lights prior to the issue. The vehicle was towed to Faulkner GMC where it was eventually inspected and determined to be an engine failure consistent with the open recall affecting GM 6.2 L87 V8 engines. A replacement engine was installed under warranty. Additionally, a defective tailgate switch was discovered and replaced. A prior unrelated incident had occurred where the tailgate switch activated on its own lowering my tailgate while the vehicle was in motion. The tailgate lowered onto the tongue jack of a trailer I was towing causing damage to the tailgate. This issue occurred multiple times throughout my ownership of the vehicle until the switch was replaced. GM acknowledged the switch was found to be defective but refused to take responsibility for the damage.

Filed Sep 9, 2026 · Engine, Fuel system · WA

Lifters and camshaft failure, loud clanking, & sudden power loss on the 6.2 motor are the first noticeable signs. Instantly when everything happened check engine light, cruise control, & stabilizer lights flashed. The sudden loss of power forced the vehicle to suddenly slow down forcing my camper into the truck. I was hauling a within weight standerd camper but had difficulty bringing both the truck with the camper to a safe stop. There were no early signs or signal prior to sudden cautostrophic engine failure & all service records have been completed by a GM certified service dealer.

Filed Sep 3, 2026 · Engine · NE

The vehicle was part of the GM L87 engine recall. The vehicle was taken to the dealership in late 2025 for recall service. The dealership inspected the vehicle for vibration and determined that it required an oil change and updated service manual to require 0W-40 oil. On June 21, 2026 the vehicle experienced an engine failure.

Filed Sep 3, 2026 · Engine · FL

I purchased a 2024 GMC Sierra 1500 Denali Ultimate equipped with the 6.2L V8 engine on XXX. The vehicle currently has approximately 25,000 miles. On XXX, the vehicle underwent the GM recall repair related to the 6.2L engine at Don Mealey Chevrolet. On XXX, approximately nine months after the recall repair, my family and I were traveling on the [XXX] with my two children inside the vehicle when the engine suddenly experienced a major failure. The vehicle became inoperable while we were traveling on the highway and had to be stopped and subsequently transported to Schumacher Buick GMC in [XXX]. The failure occurred unexpectedly while the vehicle was being operated normally. Having an engine failure while traveling on a major highway with my two children in the vehicle created a significant safety concern because of the potential for loss of power and the danger associated with becoming disabled in active highway traffic. GM has subsequently authorized replacement of the engine under warranty. The vehicle remains at the dealership awaiting completion of the engine replacement. I am reporting this failure because the vehicle had previously received the GM recall remedy for the 6.2L engine issue and subsequently experienced a major engine failure at only approximately 25,000 miles. The failure occurred approximately nine months after the recall repair. I am concerned that the previous recall remedy may not have adequately addressed the underlying condition associated with these 6.2L L87 engines. I am requesting that the federal safety agency document this failure as part of its investigation into 6.2L L87 engine failures and evaluate whether the existing recall remedy adequately addresses the safety-related engine failure condition. Vehicle information: * [XXX] GMC [XXX] 1500 Denali Ultimate * 6.2L V8 engine INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)