Engine And Engine Cooling Problems of GMC Sierra 1500 - part 1

The contact owns a 2022 GMC Sierra 1500. The contact stated that while operating the vehicle, the check engine warning light illuminated. The vehicle was taken to the local o'reilly's, who diagnosed that the cylinder #2 glow plug had failed and needed to be replaced. The vehicle was not yet repaired. The manufacturer and local dealer were notified of the failure and informed the contact that the VIN was not included in the manufacturer's special coverage that was related to the failure. The contact stated that the special coverage service was for the previous model years with a 3. 0-liter turbo diesel engine that had experienced the same failure. The failure mileage was 38,773.

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I own a 2023 GMC Sierra 1500 (black widow edition). The truck has only 23000 miles on it. I experienced an idle engine warning mid driving, and oil hot warning. It did shutdown the engine of the vehicle and as I was trying to merge safely to the right lane and right side of the way the steering became very hard which put me and 3 of my employees in danger. After parking safely, I did call onstar and they ended up towing the truck while we waited for hours in the dark and cold temperature to get a ride. State police and mdot did not show up even though we called them multiple times. This was a nightmare.

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It is the same issue with 2021-2024 6. 2l engines that have already been recalled. I have to replace lifters and cam because of the issue.

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Engine knock, loss of power, engine failure warning, ticking.

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I got 3200 miles on my 2025 GMC 1500 6. 2 engine. The engine crash. Knocking. Skund like its going to jump out. Been at dealer in columbus. Since Thursday. No one touch it.

While stopped at traffic signal, vehicle suddenly stops running. Restarted vehicle and had to feather the throttle to keep it running. Engine began to run normally so I continued driving. When I reached approximately 35 mph, a loud rattling noise started and experienced a severe loss of power. Fortunately I was able to safely get out of the traffic lanes to the side of the roadway. I inspected the vehicle, no oil leaks, no coolant or transmission leaks. No warning indicators on the dash. Oil pressure normal. Temperature normal. I limped the vehicle home to be towed to dealer. Approximately 2 months ago this vehicle passed the recall inspection and had the recommended oil change. There was a previous warranty repair performed on a stuck exhaust valve in the #8 cylinder. The vehicle was also brought in to the dealer for suddenly cutting off while driving approximately 50 mph. Again I was able to pull off safely. The vehicle then started normally and I proceeded to drive. The dealer inspected the vehicle and could not replicate the issue, and found no electrical or mechanical trouble codes. There were absolutely no warning indications prior to each of these events.

Ecm - engine system code p0700 and tcm - transmission system code u0073. The truck went in to first gear and wouldn't go over 5 mph on the highway. The dealer is saying it can't be replicated but it's happened multiple times to the vehicle in the past week. The truck was taken to the dealership and inspected but they claim nothing is wrong. The check engine light came on as well as the aforementioned codes.

Took the vehicle to the dealer because of an engine noise. It had issues with the valves knocking when it had around 1000 miles. I took it in and now the truck has around 67,000 miles and I’m being told it needs a new engine because of a bent rod in the engine. I was told that I need a new engine. Previously I had a lot of other issues with the front wheel hubs clicking. But, this truck didn’t even make it to 5 years and now it needs an engine.

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My wife was driving at highway speeds with all are kids when the trucks motor suddenly loss all power all check engine lights illuminated and what I'm assuming had major engine failure causing rod knock.

My GMC dealer falsely reported that recall work was completed on my engine but it was proven by an independent service center that it was not done. Items that have been proven to have not happened were 1. Replace engine oil with higher viscosity oil, 2. Replace oil filter to match new oil, 3. New oil fill cap labeled with oil type, 4. New insert for owner's manual. The way I initially learned the work was not completed was by warnings on my dash about low oil pressure and low oil level in my engine this past weekend. The independent service center provided confirmation that the invoice from my GMC dealer was falsified and that the work they stated was completed was not done. As a result of the failure to complete the work, my engine ran on insufficient oil and, based on the dirtiness of the oil in my engine, it compromised its condition.

Took truck in for recall on sept. 19th, it passed and oil was changed per recall. On Nov 1, driving on ih 20. Engine oil pressure went to 0 and engine stopped. The dash showed that oil pressure was low and to pull over vehicle. I was going 75 mph at time. Pulled to emergency lane and engine died. Had to tow to dealer. It was very unsafe due to speed and traffic on highway. At no other time was there any indication of engine problem.

We were traveling when it went into limp mode slowing our speed way down. We got it to a dealership and they determined low oil pressure and metal in the oil. My vehicle only has 1185 miles on it.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at 25 mph and making a turn, the vehicle lost motive power. There were several unknown warning lights illuminated after the failure. Upon investigation, the failure was related to NHTSA campaign number: 25v274000 (engine and engine cooling). The vehicle was towed to an independent mechanic, where it was diagnosed with lifter failure and camshaft damage. The vehicle was repaired. The local dealer was not contacted. The manufacturer was contacted and opened a case, and referred the contact to the local dealer for assistance. The failure mileage was approximately 86,960.

On October 23rd at approximately 0900-0915 hours I arrived at a friends house located at [xxx] . As I normally do, I pulled up into the driveway which has a pretty significant incline. I shifted the column shifter into park, and turned off the vehicle via the push button ignition switch. The parking brake/hill brake system automatically engaged as per normal operation. I exited the vehicle and before I could shut the door, the vehicle began to roll backwards. The driver's side door hit me in the right shoulder which pushed me to my left and caused me to roll my left ankle due to the down slope of the driver way. While I felt immense pain in my right ankle, I was able to jump back into the truck and slam on the brakes, causing both rear wheels to lock up and skid in the driveway. I then turned back on the vehicle, noting that the transmission position was still in park, and the parking brake/hill brake was still engaged. I had to disengage the push button parking brake/hill-brake, shift the vehicle from park into drive to move back up the driveway. This time I ensured that the vehicle did not move after following the exact same steps. My truck under went an approximately 30 minute software "upgrade" approximately 2. 5 weeks ago. I believe there was an issue where the park sensor did not fully engage, leading the vehicle to believe it was still in an operational gear, however it does not explain how it was able to not only over-ride the parking/hill-brake itself, as well as allow me to shut the vehicle off and exit the vehicle. This safety hazard has caused me an injury that has already caused me to miss 48 hours of work (I am a federal firefighter) and will require more missed time should surgery be required. There were no warning lamps, the backup camera was not engaged, the only audible sound was the beep that the vehicle makes when engaging the parking brake automatically. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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Pulled up to a stop sign, the engine shutoff and would not restart. Had the vehicle towed to the dealership. Received a call that the engine will need to be replaced. The code is a p0016. Same code as the other 6. 2 l87 gm motors, but is not currently under the recall. They found no metal in the oil pan and the engine only has compression on cylinders 2 & 8. Make no mechanical sense. Before this, I had no engine lights, I had no oil burning, I had no smell of oil and the truck ran fine. No loss of power or any other issues.

While towing a trailer on highway 77 in northern wisconsin, my 2019 GMC Sierra 1500 experienced a sudden engine failure. The dashboard lit up with alerts for the engine, transmission, abs, and traction control. I safely pulled over in a 55 mph zone with narrow shoulders and heavy truck traffic due to nearby road construction. The truck lost all power, and I had to block the driving lane to transfer the trailer to another vehicle, creating a hazardous situation. There were no prior warnings or issues. The truck had regular service at independent shops, and I had checked and topped off the oil that morning. Lahti towing & service recovered the vehicle, changed the oil (no metal shavings), and replaced the camshaft sensor, but the truck still wouldn’t start. They then towed it to rhinelander GMC, where a broken timing chain was diagnosed, requiring a full engine replacement. The vehicle is currently at rhinelander GMC and available for inspection. I have photos of the dashboard alerts and data from the gm app documenting the incident.

I own this 21 GMC sierra with a 6. 2l. This VIN is not part of your current recall. But my truck is at a dealership waiting on a replacement engine. I was told that the engine locked up in the bay. Not sure if any lights came on before the engine failed, the dealer did not go into that much of detail. The truck is sitting outside waiting on the engine, not sure if gm made then do any failure analysis or just said its a 6. 2 were sending an engine.

My engine has a loud knocking/ticking noise. I have had one mechanic look at it. He has me taking my truck to a dealership this week. He believes the known issue with GMC's 6. 2 engine is taking place in the engine in my 2019. From a verbal conversation with the dealership, they believe the same. I was advised to complete this form ASAP.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, several unknown warning lights illuminated, and the engine seized. The vehicle was taken to an independent mechanic, where it was diagnosed with a misfire in cylinder #3 and engine failure. The contact was informed that the engine 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. The manufacturer was not made aware of the failure. The failure mileage was approximately 101,000.

I just took my 2021 GMC sierra 1503. 0 duramax diesel into faulkner Nissan, today 10/18/2025 m, to have that recall fixed. I picked it up from the dealership and drove about 10 miles before it went into limp mode and reduced power mode while I was driving and started to shift very roughly and I’ve never had any issue like this before they supposedly fix this recall, I think the software patch made it worse in my case. Now my vehicle is throwing a bunch of different transmission error codes, that it has never produced , and it is going into reduced power mode,as I’m driving and going into limp mode as I’m driving, which you never has done before and it feels like it’s stuttering in early gears now and the idle was really rough it didn’t idle at a specific spot it went from 800 to 1300 back down to 800 when it should’ve just been idle at 800. I don’t know what to do. It seems like this recall made the problem worse for me and my truck in this case, I don’t know what to do and I don’t know where to go. I hope you guys can help us. Please make GMC take responsibility before somebody gets killed. If they haven’t already this issue is extremely dangerous and I’m sure is destroying the transmission. I don’t feel comfortable driving my family in my vehicle anymore because of this issue it is terrifying….

I was traveling home from work and lost all power to the vehicle while driving. No warning lights, check engine lights came on. I was able to cross traffic and park it in a business place. I had it towed to a chevy dealership for diagnostic. They said that the timing chain came off and I would need a new engine. I had it towed to a auto mechanic shop for a second opinion and they gave the same result. The vehicle is only 4 years old with 92,000 miles on it. When I lost all power to the vehicle, I did not hear any strange noises.

I noticed a ticking sound in my 2020 GMC Sierra 1500 slt 5. 3 liter on 10/15/2025 after it was serviced at an authorize Buick GMC dealership on 10/13/2025. I made an appointment and returned the vehicle to the dealership for further inspection on 10/17/2025. I was informed later that day that my truck has lifters and camshaft failure. If my truck had stalled or stopped on the express way, myself and others safety could have been at risk. My truck has only been looked at by the dealership at this time, and it is available for inspection upon request. There were no warning lights, check engine lights, messages or symptoms prior to the failure. I did get a low oil level message in April 2024 when the dealership stated they must not have put the correct amount of oil in my truck during an oil change on 1/29/2024. They inspected my truck and assured me there was no damage done to my engine from this issue. I have recently learned there is a recall for gm vehicles manufactured between 2021 and 2024 with the 6. 2l engine installed. I am not sure why this recall does not include 2020 trucks with the 5. 3l engines installed. Apparently, the same problems exist with these engines also. I received an estimate for repair approximately $13,000 which can increase once the engine is town down and inspected further. Any assistance you can provide would be greatly appreciated.

A lifter in my cylinder is bad and damage to my cam shaft. This truck also has the 6. 2l engine that was recalled for other GMC vehicles. My safety was put at risk as I was driving it and it started smoking. I have had 2 different mechanics look at it. One mechanic was an independent business, the other was a certified GMC dealer. There was no warning lamps or messages.

Lifter and camshaft failed.

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The engine seized and locked up leading to a catastrophic failure of my three month old 2025 GMC sierra denali at approximately 3,181 miles. The engine, the 6. 2l v8, was listed as a recall engine by gm for model years 2021-2024. My 2025 allegedly "passed inspection" yet had the same catastrophic failure. The vehicle engine made loud noises and it sounded like parts were breaking. The vehicle no longer starts and had to be taken via flatbed to the dealership where I was informed the engine had to be replaced.

43000 miles 2020 GMC sierra with lifter engine issues. Oil change made every 3k miles.

Truck cut out going across the road almost got hit due to the vehicle stalling then about a mile down the road the check engine light came on parked it took it to my mechanic and after the incident it was throwing a cylinder misfire code. Cylinder one when the mechanic got in there was completely shot and I had to have a new motor. No warning no lights could have potentially caused a major accident.

Vehicle showing signs of a failing coolant flow control valve and/orcoolant temperature sensor. - ac takes a long time to cool down - engine fan will stay on after the vehicle is shut off - I often see the notice of “a/c off due to high engine temp” from what I can find, this issue I’m experiencing is a known point of failure in this vehicle make/model/year. On 10/10/2025, I took the vehicle to fountain Buick GMC service in orlando, FL. The service manager recognized the symptoms immediately, and even knew right away that the part to fix it was on back order - further bolstering that it is an issue that gm is aware of and deals with regularly. Per the service manager, gm’s initial response was to issue a “pay to play” software update that is covered under the 3yr/36,000 warranty, but not the 5yr/100k. Out of warranty, this “solution” costs $499. 99, and has a < 10% degree of success. If the update doesn’t fix the issue, then it would be covered. However, the need for the software update was not communicated to consumers. Regardless, since the issue is not yet severe enough to be recognized via code (despite symptoms, pictures, and video), gm will not take any action under warranty towards fixing it at this time. The vehicle’s 5yr/100k warranty expires on 10/15/2025. If the code throws on 10/16/2025, it will not be covered under warranty, but * be covered under dealer assistance. And regardless, the $499. 99 charge will apply, independent of warranty coverage. More important than the money is the safety. The engine’s temperature is not being regulated, the symptoms I’m experiencing are terminal, and this issue will not be fixed on its own.

Dtc code p1098 present related to faulty coolant control valve on 3. 0 duramax diesel engiine. This is a known issue with this engine and is supposed to be covered under the 100k mile powertrain warranty. Previously took vehicle into dealership for repair involving replacement of the coolant control valve but was told reprogramming of the ecm was required first step per gm repair bulletin. Reprogramming cost me $195 and was told this was not covered under the 100k powertrain warranty. Now, a few months later, the same issue and dtc code p1098 happened again while driving on freeway at freeway speeds and caused vehicle computer to limit speed of the vehicle which caused hazardous situation in construction zone as was not able to maintain speed of traffic while towing trailer with boat. I also understand that gm has issued special extended warranty related to this coolant control valve in September 2025 which extends the warranty coverage up to 15 years and/or up to 150k miles but I was told at the dealership that my VIN# does not qualify for this extended coverage for some unknown reason?.

The check engine light went off and started blinking. The engine started making ticking noise. I pulled over. The check engine light kept blinking. I had the truck towed to the chevy dealership. They found damage to the lifter and camshaft. They had the truck for over 2 weeks. Luckily I purchased the extended warranty. But the repair still cost me 1,200. 00 dollars out of pocket. And cost the warranty company over 9,000. 00 dollars.

Engine problems (oil, crankshaft, loss of propulsion) similar to that of recalls in 2021-2024 models.

On [xxx], at approximately 15,873 miles and while on the freeway approximately 30 miles from my home, my GMC Sierra 1500 with the l84 engine experienced a failure of the dfm lifter assembly. This required a significant engine disassembly and the replacement of multiple valvetrain components. This repair was performed at gold rush Chevrolet in auburn, CA, as documented in the enclosed service invoice. Gm has issued technical service bulletins and product communications addressing similar lifter failures in gen v small-block v8 engines with dfm/afm, including service update n212353840, pip5776, #19-na-219, and related updates. Industry coverage and owner reports and current class action lawsuits indicate that these failures can recur, even after initial repairs, due to the high cycling frequency of the dfm lifters. Given the nature of the defect and gm’s documented acknowledgement of the issue, I am requesting that gm extend the powertrain warranty coverage for the engine and related valvetrain components for a period of 10 years,100,000 miles as a goodwill policy adjustment. A warranty extension would ensure customer confidence and protect against the significant cost of a repeat failure. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Was driving at about 55 mph and vehicle popped up with warning and said shift into neutral to restart. I tried to and all power turned off. This was at around 8 p. M. So no headlights or anything. Luckily got it stopped without hitting anything. Had vehicle towed and motor was locked up. Spun bearing they said. Same issue apparently as other 6. 2 liter engines have been having.

The contact owns a 2018 GMC Sierra 1500. The contact stated while attempting to accelerate from a stop light, the vehicle hesitated before accelerating. A day later, the failure reoccurred, and the rpms increased before the vehicle accelerated. There were no warning lights illuminated. The vehicle was taken to the dealer, who diagnosed that the connecting rod had failed, and there were metal shavings inside the engine. The contact was informed that the engine needed to be replaced. The contact related the failure to NHTSA campaign number: 25v274000 (engine and engine cooling); however, the VIN was not included. The vehicle was not repaired. The manufacturer was informed of the failure and confirmed that there was no recall on the VIN. The manufacturer opened a case for the failure. The manufacturer referred the contact to the NHTSA hotline to report the failure. The failure mileage was approximately 169,000.

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After having transmission issues which was replaced under warranty, within 300 miles, the engine failed. The vehicle has now been sitting at the dealership since October 7, 2025 waiting for a replacement engine. There is no timeline available for the replacement engine as they are currently backordered. Absolutely ridiculous.