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

I was driving north/east on [xxx] just outside of [xxx]. After accelerating to give another driver room to move out of his lane that was ending, I lost propulsion/power. The sierra went into neutral and told me something like "press start to resume". I had to immediately get off the interstate as I was rapidly losing speed. I was able to pull over to the shoulder of the interstate on the right, just before exit 2. After getting the vehicle parked, I was never able to restart the vehicle. The motor would not turn over. The display screens kept cycling between a blank display and a display that looked like the vehicle was on but the engine never turned on. When I tried to start the car, I got a message of "conditions not correct for shift". We could not even get the vehicle into neutral. I used onstar to get state patrol to show up and put lights behind us for safety. Onstar should have a recording of this call. This was on Saturday xxx in the ballpark of 2:30 pm central time. I would imagine the officer also filed a report, but I did not get it. The vehicle was towed to billion GMC in iowa city. Billion GMC said their initial suspicion is the 6. 2l motor failed / locked up on us as this is know issue that is subject of a class action lawsuit. These vehicles are not safe to be on the highway, someone is going to get seriously injured, please do everything you can to get these 6. 2l engines off the road before someone dies. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2024 GMC Sierra 1500 🔎.

Head gasket failure and overheating. After fixed, power steering has just failed during driving. Will have to have it towed to shop.

See all problems of the 2018 GMC Sierra 1500 🔎.

I was driving doing about 60 mph. All of a sudden the engine stopped and the truck just coasted. I was able to find a safe spot on the side of the road and pull over. Called a tow truck and had it taken to the gm dealership nearby. The trucks engine was just fixed in October of 2025 for the camshaft and lifter rods. It’s currently in the shop and I’m waiting for the diagnostics.

See all problems of the 2020 GMC Sierra 1500 🔎.

Was traveling home and started losing power going up a hill on xxx. The truck was surging, the check engine light came on and an audible warning of no (low?) oil pressure. The truck shut off on a busy interstate highway and barely got onto the shoulder. The tow truck driver had to lay on the ground with part of his body in the lane of travel to place "skids" under the rear tires because there is no way to place this vehicle in neutral for a tow without a special gm tool. When I contacted harry robinson GMC service center in [xxx], they told me that it was no longer a safety recall because the truck had passed diagnostics and new, high viscosity oil was put in the truck xxx. The GMC app says code p0016 which is the dreaded 6. 2l camshaft to crankshaft alignment that accompanies engine component failure. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Driving on the highway near rockport, wa, when vehicle suddenly loss propulsion, engine light appeared, and vehicle went into transport mode enabled. Without causing an accident, I was able to pull to the side of the road. Once I put vehicle in park, it shut off and displayed, “tranport mode on. Vehicle would not start and was towed home. My son-in-law was able to disable transport mode, but vehicle still will not start. Will notify dealership on Monday.

Lifter failure at 20000 miles.

Ever since I bought this truck new, I noticed a lot of metal shavings and debris in the oil filter every single time I changed the oil. I took it to the dealership multiple times to have this looked into before the engine recall came out. The dealership took pictures of the metal and sent them to a general motors engineer, but the engineer just told them it was "normal. " later on, the truck went in for the official recall inspection, passed the pico test, and nothing was fixed. Then on August 4, 2026, I was driving on a crowded expressway right through a construction zone with absolutely no shoulder to pull over on. Out of nowhere, the truck started hesitating badly, lost power, and the engine started making a really loud knocking noise. It was barely running, and it was incredibly dangerous because there was nowhere to go and traffic was heavy. Luckily, I was able to limp the truck along just far enough to clear the construction zone and pull over safely.

Ever since I bought this truck new, I noticed a lot of metal shavings and debris in the oil filter every single time I changed the oil. I took it to the dealership multiple times to have this looked into before the engine recall came out. The dealership took pictures of the metal and sent them to a general motors engineer, but the engineer just told them it was "normal. " later on, the truck went in for the official recall inspection, passed the pico test, and nothing was fixed. Then on August 4, 2026, I was driving on a crowded expressway right through a construction zone with absolutely no shoulder to pull over on. Out of nowhere, the truck started hesitating badly, lost power, and the engine started making a really loud knocking noise. It barely ran, and it was incredibly dangerous because there was nowhere to go and traffic was heavy. Luckily, I was able to limp the truck along just far enough to clear the construction zone and pull over safely. The truck was towed to the dealer were they confirmed the engine was blown, and needs replaced.

I was driving on 96 w. In slow traffic on the freeway when the vehicle put itself in neutral and shut off.

2021 6. 2l GMC sierra denali. Has the l87 engine that is recalled but yet my truck doesn’t fall under the recall although the recall is for 2021-2024 engines. Everything that the engine recall states is the issue with my truck, I have service report from dealership stating that there is wear/breakage of cam shaft/crank shaft amongst other things including cylinder 3 and 5 misfiring , bearings broken , filings in the oil , banging in the engine and safety lights on. My local GMC dealership recommended that the only acceptable action was to replace the engine at my cost of course. This is unacceptable of a supposed reputable large corporation not caring about the “little guy”. The truck only has 136000 kms on it and I was only going 60 km/hr when this happened. Please help as I feel gm knows this engine is faulty but somehow has managed to escape a recall on my VIN number.

See all problems of the 2021 GMC Sierra 1500 🔎.

"while driving, the vehicle suddenly experienced a flashing check engine light, an electronic stability control (esc) warning light, and violent steering wheel vibrations. The vehicle suffered a severe loss of power and misfired, creating an immediate traffic hazard. The dealership diagnosed the issue as a catastrophic mechanical lifter failure on the 5. 3l v8 ecotec engine with dynamic fuel management (dfm). Despite the dealer replacing an entire bank of lifters, the engine continues to misfire and vibrate. This premature valvetrain failure at only 36,000 miles is a known design defect that causes sudden engine stalling and disables critical safety features like stability control while the vehicle is in motion, presenting a severe crash risk. ".

P1010 and p2b86 engine code, constant cooling fan on engine. Confirmed by dealership, quoted for coolant control valve. VIN not included in special coverage n252508341 for this known issue. Limited engine power alert, unable to maintain speed on highway. Dangerous condition traveling under speed limit.

6. 2 l just blew up per dealership.

On [xxx] I was driving my 2024 GMC Sierra 1500 VIN # [xxx] on a major highway in houston when without warning the engine shut off, stranding me in the middle of busy traffic. I was able to get to the shoulder and restart the truck, but no warning lights came on so I continued on my drive when approximately 20 minutes later, while still on a busy freeway, the engine shut off again. I was able to restart the truck and within another 15 minutes the check engine light appeared, the engine lost power and started making a loud rattling noise. Roughly 2 minutes later, as I was attempting to pull over to the shoulder and safety, the truck shut off and would not restart. This was the 3rd time for it to stall out on a busy freeway which was very dangerous for myself and the other drivers. I contacted the local chevy dealership and they sent a tow truck out to tow the truck back to their dealership service center. I was later contacted by a service advisor that said they found a code p0016. He informed me that the engine would need to be replaced. As of today 8/11/26, they are still waiting on backordered parts to arrive before they can even start on any repairs. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

I have a 2026 GMC Sierra 1500 with the 6. 2l engine. I purchased it on [xxx]. On [xxx] with 13,000 miles on the truck the engine started making a bad noise from the lower end of the motor. I immediately took it to the dealer randy wise Buick GMC in fenton michigan. They diagnosed it as a spun bearing and had to replace the engine. I just got it back today August 7th 2026 information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

I brought my truck into a certified gm dealer for recall work on the ground strap. I left the dealership and multiple lights came on dash: check engine light, service ecs, traction control, service parking brake, steering assist reduced. 7 minutes later the engine began miss firing. The dealer asked me to bring it back to the shop and after some digging they discovered my l87, 6. 2 engine was missing firing in cylinder 5. Now the motor needs to be replaced and gm is not standing behind the repair.

Unknown. Went in to get inspection for the recall on the motor and it failed the test so motor was replaced. Now the I've hade the motor for 9 moths started hearing knocking in the motor and losing power.

The truck starting making a ticking noise within 24 hours the check engine light was on and it starting shuttering. I got it to the dealership were they informed me of lifters failure, and catastrophic engine failure. Dealer is recommending replacing engine since it's a 2020 and not part of recall.

I was driving on the highway when the vehicle started to make clinking noises. The vehicle started to lose power as I accelerated it would feel like something was pulling me in the opposite direction and the knocking noise would get louder. Ultimately, I had the vehicle towed to a dealership. This vehicle passed the l87 recall not too long ago, and the vehicle is barely used.

The lifters collapsed on cylinder 3 causing the camshaft to shed metal into the oil leading to bearing failure. Leaving us stranded 210 miles away from home. Motor has 85,909 miles. This is the same problem that the 2021 model year trucks have that has a recall. The 2019 model years have the exact same problems. I personally know 6 people who have had this happen. Check out the facebook page. Gm 6. 2 lifter and bearing failure.

See all problems of the 2019 GMC Sierra 1500 🔎.

I was driving to work on 7/20/26 and my vehicle loss engine propulsion , engine failure and unable to restart vehicle and shift gears.

See all problems of the 2022 GMC Sierra 1500 🔎.

Driving down the interstate at 70 miles per hour, started losing power, engine light came on. Engine started making a loud banging noise as I pulled onto an exit.

See all problems of the 2023 GMC Sierra 1500 🔎.

The contact owns a 2026 GMC Sierra 1500. The contact stated that while driving 45 mph and depressing the accelerator pedal, the vehicle slowed down unexpectedly. The vehicle then lost power while stopped at a traffic light. No warning light was illuminated. The vehicle was turned off and restarted, and the vehicle operated as intended. The vehicle was taken to the dealer, where it was diagnosed and determined that there were metal shavings inside the oil pan and the engine needed to be replaced. The engine was replaced twice. The manufacturer was not notified of the failure. The approximate failure mileage was 3,202.

While traveling from [xxx] to [xxx] for vacation, I was in [xxx], and when I pulled off the interstate and came to a stop sign the vehicle quit. At first, I was unable to restart the vehicle, but after sometime I got it started and was able to pull it off the road while the engine was making very loud clattering noise and the vehicle would not stay running. Prior to this there were no warning, lights or indications that the engine was going to quit. I checked the engine oil and it was full. I had the vehicle transported to a GMC dealer in [xxx], where it was diagnosed as requiring a new engine. The vehicle is a 2026 GMC Sierra 1500 denali purchased in December 2025 and has 8,865 miles on it. A little over 4000 miles I had the vehicle oil changed at starling GMC titusville FL. At the time of my service visit, I asked the service writer, [xxx] to check the engine idle because at times it seemed to run a little rough and it quit while pulling in my driveway one day. [xxx] advised me that there is no idle adjustment on the vehicle, so I said I’ll just keep an eye on it. There were never any indications of an engine problem prior to this or even as of now there are no warnings displayed on the instrument panel. I also subscribe to onstar and it indicates everything in the vehicle is normal with no issues. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Subject: event of engine failure • while driving on a level paved road at 15 miles per hour in a busy area my 2019 GMC sierra denali pickup truck stalled in the middle of a busy street. • truck stalled in a heavy traffic area at an intersection putting myself and passengers in a dangerous area and situation. This obstructed the normal flow of traffic causing a danger to pedestrians and normal vehicle traffic pattern. Each had to go around my disabled truck into oncoming traffic putting them and normal traffic flow at risk. •upon securing a towing service the truck was transported to the nearest gm dealership. This happened on a Friday afternoon and the truck got to the dealership after hours. I returned to the dealership the next morning and was told that they may not be able to check the truck until probably Tuesday. On Monday afternoon I called and they hadn't been able to get to it. I received a call the next day and was informed that the technician at the dealership had put a breaker bar to the crankcase and the engine would not move and therefore the engine is seized. • there were no warning lights that came on prior to the truck stalling in the street. There was no noise prior or any other symptom to give any indication that the truck was not operating in a normal fashion.

I purchased the vehicle on may 29, 2026 and it stated the 6. 2 liter engine recall had been fixed and that I have extended special coverage for the exact issue of the recall until 150008 miles on this vehicle. On July 14, 2026 the vehicle was being driven and stalled out at a traffic light and restarted, yet within a quarter mile it stalled again at the next traffic light and became completely disabled, it would not even allow a shift into nuetral, so I had it towed less than 100 feet into the walmart on loudon road in concord, nh 03301 parking lot. On July 23, 2026 I was able to get the batter charged and attach a code scanner which showed one code (p0016). Pursuant to recall n252494001 (which had allegedly been repaired, likely with the bandaid fix of thicker oil) any 6. 2 liter gm truck with the loss of propulsion needs to be plugged into a scanner and if code p0016 is present, engine replacement is needed. Specifically noted to the recall is special coverage n252494003 which provides the coverage to 150,008 miles on this vehicle is directly related to the recall. At the time of loss of propulsion the vehicle had 99,195 miles present on the odometer. The following day July 24, 2026 I had the vehicle towed to banks Chevrolet GMC in concord nh, after the vehicle arrived, I spoke with the service department, provided them with the recall paperwork and printout of the special coverage uner the VIN as well as a photo of the odometer and my scanner displayining one code p0016. They then informed me it would take them until August 24, 2026 to "diagnose" the vehicle. The recall is clear it just needs a code scan if disabled. I have contacted gm and informed them of the need for a loaner as the vehicle is a vehicle utilized for business. I have since been told they will try to look at it earlier and no loaner will be offered but I "may" be able to be reimbusred $44. 00 a day for a rental. There are no rentals for that price that can tow over 9500 pounds. It is unnacceptable.

The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving uphill at an undisclosed speed, the vehicle stalled and failed to return to normal operation. No warning lights were illuminated. The vehicle was towed to a dealer to be diagnosed, and the contact was informed that the engine needed to be replaced; however, parts to repair the vehicle were unavailable. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 83,000.

Total engine power loss while driving 70mph on the highway in steady moving traffic causing a safety hazard, with 3 young children in the vehicle. No prior warning lamps, messages or symptoms to indicate a problem. Engine completely shut down while driving and will not turn back on. Had vehicle towed to the dealership. Certified GMC dealership did a full inspection and indicated that the engine assembly needs to be fully replaced. Nhtsa campaign 25v274 for vehicles 2021 and newer is for the same exact engine failure issue with the same engine size. I would appreciate you exploring the possibility of covering this catastrophic malfunction as an exception to the aforementioned recall campaign. Many other drivers have noted the same failure with the 2019 as was included in the recall for 21-24. Thank you for your consideration, please feel free to reach out to me directly to discuss further. I look forward to hearing from you!.

At 115,000 the coolant control valve has gone out. Gm acknowledges this issues in 2020 model trucks. My truck is a 21 and displaying the same characteristics. A simple google search will show this is a known issue in 2021 vehicles as well. In 2020 model trucks gm has provided a special 150,000 mile warranty to replace this part. Gm needs to step up and provide a proper warranty/recall for the affected 2021 models.

I'm not sure if they've pulled it out yet. They said two weeks to get motor. Engine started shaking and then started knocking. Had wrecker take it to GMC dealer they said it needs an engine. It is a 2021 6. 2 carbon pro 1500 sierra at4 it did not come up on recall list and I don't know why? it obviously the same problem.

Engine started making a loud knocking noise and it sounded like the engine was about to throw a rod. Turned engine off and called gm. Vehicle was towed to dealership and it was diagnosed with a thrust bearing failure. My truck only had 14k miles on it. To fix the bearing issue, it will need a new engine. Gm does not currently have engines to replace the faulty ones so it has sat at the dealership for 3 weeks with no eta as to when it will be fixed. This is apparently a common problem in the 2025-2026 models lz0 3 liter diesel. They are still selling these affected vehicles currently, knowing that they may have a problem. Gm needs to issue a recall and take these vehicles back.

See all problems of the 2025 GMC Sierra 1500 🔎.

I am writing to formally log a safety concern regarding my vehicle’s 6. 2l l87 engine, specifically in relation to the known defects under NHTSA’s ongoing engineering analysis ea25007 (previously preliminary evaluation pe24004). While my vehicle is currently running and has 52,000 miles on the odometer, it falls squarely within the manufacturing window being investigated for premature engine failures due to defective connecting rod bearings and dynamic fuel management (dfm) lifters. My primary concern is the severe safety hazard presented by a sudden, catastrophic engine failure. A sudden seizure or loss of motive power at highway speeds puts myself, my passengers, and other drivers at an immediate risk of a high-speed collision, especially if it occurs without prior warning lights or symptoms. Because gm’s previous engine recalls (such as 24v-418) excluded the 2019 model year despite utilizing the same vulnerable engine family, I am filing this report to urge the NHTSA to expand the recall to include 2019 models. I want my vehicle's VIN documented as part of this vulnerable population so that a proactive, permanent remedy can be mandated before a dangerous highway failure occurs.

The engine went into limp mode as I made turn leaving the damn I was is in town and it was a lot of traffic could’ve been bad if I didn’t pull into the median left me devastated and no crank no start I’ve only had the truck a year it went down a month from when I purchased it.

I was driving and my check engine light came on a mile from my house. I drove home and the next morning, I started my truck. It was loud and pulsating like it wanted to stall out. I had it towed to a repair shop. They plugged into the truck and said it was giving code p0016. I had it towed to another place and that it is where it is sitting now. I also received a email from onstar saying "a critical issue with the engine and transmission system in your 2021 GMC sierra crew cab has been detected. P0016 was detected. I searched my VIN # and it says that there are no recalls on my truck. I do see that there was a silent recall on the engine that is in my truck.

The lifter on my gm sierra at4 truck with a 6. 2l (l87) engine collapsed and damaged the engine shafts and cylinders in the block. While driving, the engine started to lose power, and a ticking noise started to occur. I pulled the car over to the side of the road and called the dealer, which told me to have the truck towed into the dealership. Metal was found in the oil. The entire engine has to be replaced for $12k. I have a life time oil change service with the dealer an also an extended warranty, but my mileage was over the warranty by 6k miles. The warranty ended at 106k miles and actual milage was 113k. I reached out to my dealer and also to gm to discuss goodwill assistance and gm pushed back indicating they cannot do anymore. I asked the rep to esalate the ticket.