On [XXX] I was traveling at highway speed south on [XXX] . I was driving my 2023 GM [XXX] The truck had 36,199 miles at the time of the incident. The engine is a 6.2 L EcoTec3 V8. While traveling at highway speed, without any warning, the engine shut down. The shift indicator displayed the vehicle being in neutral. When I tried to shift back into gear, a dashboard display stated "The current conditions are not suited for shifting." Fortunately I was able to coast onto the center median, off the traveled protion of the roadway without incident. I contacted the New Jersey State Police. They sent a tow operator to my location, and I was towed to Lester Glenn Buick-GMC in Tom's River, NJ The next day a representative from the service department informed me the vehicle suffered a catastrophic engine failure. The engine completely seized and the vehicle would need a complete engine replacement. The reason for the engine seizure has not been determined as of this time. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
2023 GMC Sierra 1500 engine complaints
Page 7 of 9: complaints 161 to 190 of 238, newest first, as owners wrote them.
Engine failed and it is available for inspection upon request The engine started coasting down a major highway and it put myself and others on the road at risk. The dealer has confirmed that this 6.2 L engine has been giving the dealership problems with these GMCs. The vehicle has only been inspected by the Dealership. The Warning Message stated that I needed to restart the engine; however, you can't do that on a major highway due to pressing the break. The vehicle was already on; however, the engine was not connected. No other symptoms were happening prior to the incident. The engine trouble appears only at this incident.
Engine has seized twice, completely shutting down without electrical power or brakes. The vehicle also shut down in an intersection (no power, brakes, flashers). I was able to pull to the side on the 2 engine seizures but not during the electrical shutdown at the intersection in the turn lane. The engine was replaced the first time by Quality GMC in Albuquerque, NM. The 2nd engine is being replaced by Diamond GMC in Palmdale, CA. Warning lamps on the 1st engine seizure was tire pressure warning. The electrical shutdown was forward collision warning, emergency braking, etc. The 2nd engine seizure said something about engine needed to be restarted.
Was going up a hill and all of the sudden the engine stopped, the truck coasted to the edge of the road. A message came on saying 'Press start to reset engine.' Doing so did nothing. The truck ended up having to be towed to a dealer. They were not able to turn the engine over by hand and ended up diagnosing the engine as a seized from a failed bearing. They ended up replacing the entire engine with a new identical one. They have not been able to tell me if the new engine is in the same engine group that I could experience the same thing a second time.
While towing my boat to the Florida Keys, I encountered a series of mechanical issues on Interstate 75. The engine’s exhaust became excessively loud, causing the engine to abruptly shut off. Despite successfully maneuvering into the safety lane, I was unable to restart the engine. I promptly contacted the dealership, which dispatched a tow truck to my location. However, the tow truck driver was unable to put the vehicle in neutral gear. Subsequently, I reached out to GMC, which informed me that the tow truck required a flatbed for transportation. I waited another two hours for a flatbed truck to tow the vehicle to the dealership. A few days later, I received notification that my engine had seized, necessitating an engine replacement. The dealership informed me that the 6.2-liter engine was experiencing a national backorder. I had purchased this used vehicle less than a month prior and had not yet made my initial payment. Consequently, I find myself without a vehicle. The dealership has been unable to provide an accurate timeline for the repair to be completed.
Complete engine failure while driving at highway speeds which put me and my family in dangerous risk of injury or death. The dealer confirmed the engine failure and needs engine replacement. The engine failed with no warning which only had 8700 miles.
4-5-25 Going 65 mph truck shut off for no reason. Dash message stated “press button to restart” I managed to pull over on side of road and place in park and restarted. Drove home and Chevy dealer service was closed. 4-7-25 Called in morning to get truck into service. 4-8-25 Service advisor called and stated No dash lights no codes . I explained that it was scary to have truck shutoff with no reason.i also stated that truck lurches and auto stop sounds wierd. Dealership Said tech was going to investigate further. I got a call next day 4-9-25 Service advisor said the main bearings bad and tech recreated problem and that motor was blown and need to order new from Michigan . Service advisor said he ordered engine and that it was known issue and covered under warranty. I asked how long he would have truck and he stated NO ETA. Truck engine seized during tech driving to reproduce my issue.
Turned onto highway. Got up to about 60 miles per hour. After a couple minutes the truck lost all power. Was pressing gas and noticed speed declining. Looked at dash and noticed rpm decreasing. All lights were off in the dash. I let the truck coast to the edge of the highway. Attempted to jump start and replace battery and nothing happened. Had it towed to a mechanic who said the motor was seized up.
My wife and I were traveling westbound on [XXX] just outside of Durkee Oregon, when while going up a hill with Cruse set to 72, the truck began to slow down drastically. When I looked down I was then going 60 and showing down fast. I was able to get to the side of the road and then the truck stopped, it shut off. At that point the truck has not be back on. It would not turn on and Onstar reported that there is an issue with the Engine and transmission. No warning lights came on until we stopped. Then the Engine light was on and the truck said that it was overheating but the oil temps were normal. I feel lucky that there was not much traffic. My wife and I were on the side of the road for 2 hours at dusk and in the dark with 65+ MPH traffic zooming by. Also had a impossible time tracking down a rental call just to continue to my wife's grandmother's funeral service. I just talked with the dealer and they will not have a diagnoses for me until late tomorrow. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The contact owns a 2023 GMC Sierra 1500. The contact stated while driving at various speeds, the vehicle experienced a loss of motive power. The contact shifted to neutral(N) and was able to restart the vehicle. Additionally, the contact stated that while driving 55 MPH and pulling an unloaded trailer, the vehicle suddenly stalled. A message advising the contact to shift to neutral(N) and to attempt to start the vehicle was displayed; however, the vehicle failed to restart as intended. The contact was still able to use the power brakes and the power steering, which allowed the contact to pull over in a safe area. The vehicle was towed to the dealer, where it was diagnosed that the presence of copper filings in the oil had caused the engine to run roughly. The dealer determined that the engine needed to be replaced; however, the part was not available. Additionally, the average waiting period for an engine was approximately 6 months. The vehicle was not repaired. The manufacturer was informed of the failure and a case was filed. The failure mileage was 33,000.
I was driving on the interstate when my vehicle’s display indicated that I needed to press start and that is when I noticed the engine was not running. I had to quickly pull over moving three car lanes all while coasting and I came to a stop. I tried multiple times to restart but the engine would not restart. I still had electrical power and turned on my hazard lights and called for a tow truck.
Engine Failure
While driving my truck shut off and went into neutral. Truck restarted after cranking for a long time. Did the same thing within a mile and then started making knocking noises, turned off and would not restart. Completely dead on the road. Truck was towed to nearest dealership.
Driving at night on non-marked rural road at approximately 40 mph when the motor quit. I was going slight downslope and didn’t know until the Push button to start message came up. I coasted to a stop in the road and when push button to restart the lights went out and no movement of engine. Even though the lights came back on when button was pushed again nothing seemed to respond. Emergency flashers and radio did work. Transmission selector would not go to neutral to allow movement from the road. I called wrecker service and set in the truck for about a hour waiting and nervous about someone hitting me from behind as it was a dangerous spot just around a corner. The wrecker could not get the truck in neutral after several attempts ended up dragging the truck to get it loaded. Since I was within a mile from my home and it was midnight on Saturday I had him take it to my home. Monday I called Thompson GMC and wrecker came took it in to the dealership in Springfield MO. Tuesday 8:30 am I received a text from service saying that it was going to have to have a new motor as it was completely full of metal shavings. The replacement 6.2 engines were on backorder and they didn’t know when they could expect them. I was shocked as I had not had any trouble and really liked my truck to this point. I tried to get dealership to trade for another truck but they didn’t seem to want to wait for the engine either and would not give much for trade on a 18 month old truck. Obviously, this is a frustrating position as the truck is a huge part of my life. In the last few days I have found that GM has known of the problem for some time and they don’t have a remedy for me to recover my investment in their faulty product. I saw on internet where the federal safety agency had more than a 1000 complaints so I decided to add mine. You can bet that their are many many more that have been repaired before the motors went on backorder that are not reported. GM needs to step up NOW!
While driving home from work, my engine, with only 20k miles on it, started to make noise. I immediately got off the highway at the next exit and as soon as I came to a stop the engine noise got even louder and the vehicle shut off. Was able to barely get it started but managed to get it off the road before it died again. Had it towed to my GMC dealership and have been advised that the engine is done and needs to be replaced. Seems to be a very common occurrence on GM vehicles with the 6.2 engine. Won’t have the truck back for minimum 6 weeks but still have to continue to make my $1000 payment for a truck with no working motor due to factory issues.
The motor quit while traveling on the highway. There were no warning signs. No noises, lights, smoke, smell, etc. It just quit. I was able to steer closer to the side of the road while it coasted to a stop, but it was difficult. After the vehicle coasted to a stop and it would not restart. The electronics appeared to work (radio, signals, lights) but found that they would not turn off. It has been confirmed that the engine has completely failed by the dealer. No traffic was affected, but it could have been.
I was driving my truck on I-65 around 75mph and the engine just shut down. I had to maneuver the vehicle out of traffic onto the side of the interstate. It would not restart. I had it towed to my dealership and they told I experienced total engine failure. It was caused by internal bearing failure
GM 6.2L Engine shifted itself into neutral and shut down while my wife was alone driving 65mph on [XXX] in Tucson Arizona. No error messages or check engine signal, Vehicle Information Center advised pull over and push Start Button. Vehicle would not initially restart but did start within 5 minutes and my wife was able to limp along the 1/4 mile to the next off ramp to get off the highway. Local GMC Dealer confirmed the seized motor and immediately ordered a new GM motor. Vehicle is 18 mo's old with 26,500 miles and is sitting at the dealer. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
While driving on highway, during rush hour at [XXX], in the center lane of the highway the engine turned itself off and stopped running. Was traveling with traffic, approximately 70-75 mph, engine turned off the truck started deaccelerating rapidly. Was able to change to the right lane and pull over on to the side of the highway. Truck rolled roughly 100 yards and then stopped. The dashboard lights were on and gave the appearance the truck was running, but it was not. Could not restart the vehicle. Tow track came and had to drag the truck up to the truck bed and then shack it off - when taken to the dealership. Truck could NOT be put in neutral. Truck is current at the dealership. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The contact owns a 2023 GMC Sierra 1500. The contact stated that while driving 70 MPH, the vehicle lost motive power. The check engine warning light illuminated after the failure had occurred. The vehicle was towed to the dealer, who determined that the engine had seized and needed to be replaced. The vehicle was not repaired. The contact related to the failure to the federal safety agency Action Number: PE25001 (Engine and Engine Cooling). The manufacturer was not made aware of the failure. The failure mileage was approximately 23,000.
Was driving down the interstate at 70mph with cruise control on. The vehicle lunged forward and soon after a reduce power message appeared in the messages. I was able to avoid any incident with other vehicles and exited the highway with the motor was making loud noises. I parked the vehicle and called for roadside assistance. The vehicle had to be towed to the dealer, and I found out that the 6.2 liter V8 motor has metal in the oil and the entire engine needed to be replaced. The thrust bearing failed and required a full engine replacement. The vehicle has approximately 21,000 on it and is still under warranty, but it is a 3-6 month wait to get a replacement engine. I have searched the internet and found that there are many vehicles that are having similar issues with the 6.2 L V8 GM motor. It has been slightly over a month since the incident and have not received any updates.
I had my 6.2 engine replaced at 26,000 miles and the transmission rebuilt. The engine was contaminated with metal shavings and the transmission rebuilt for internal defects. The new engine is running fine but the reliability is a concern after reading about other customers having the same problems. My name is [XXX] . The engine replacement and transmission repair was done at Ed Martin GMC in Carmel Indiana. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
With out any warning the truck stop running at stoplight an would not start back up. We could not move the truck out of the road and blocked traffic for almost 1 hour waiting for the tow truck and getting it loaded on the tow truck (truck would not go in to neutral). The truck is now at the Dealer and they are saying that the engine seized up and will need replaced.
On Saturday March 1st I was driving East on I-10 in Florida when my trucks engine lost power. I managed to get over onto the shoulder of the road and got out of the flow of traffic. Very scared I was going to get hit before I could get off the interstate. Motor was making a terrible noise like the lifters let go. I was beside the interstate for about 3 hours trying to find a tow truck to come get me and the truck off the side of the interstate. I had the truck towed for about 60 mile to get it back home to the dealership. The truck has 26,000 miles on it and the dealership told me the motor was no good and that there is metal pieces in the oil pan. 2 weeks have past by and they can't tell me when they will receive a replacement motor. What am I supposed to do? $80,000 truck 2 years old and the motor is no good. Thanks
I own a 2023 GMC Sierra 1500 Denali Ultimate. The truck had about 19k miles on it when the engine seized while driving on the highway late at night in January. This was extremely dangerous as I was going 55mph over a bridge and lost the engine. I was stranded on an exit ramp unable to move. It was cold that week so it was 5 degrees. Onstar informed me that since the truck could not be shifted into Neutral that it would need dollies and a flat bed. They said they could get to me at 8am which was 9 hours from when the truck broke down. It was 5 degrees out and I had no heat sitting on the highway. I ended up calling a local tow company and they were able to get to me but I had to wait 3 hours. The truck was towed to the deal and they confirmed that the engine seized (it is a known problem) and it needs a new motor. They said there is a big back log of engines because many have this issue. I still have not provided a timeline for the truck to be repaired.
During travel of the highway, the motor suddenly lost power and shut down with no warning lights or symptoms prior. Although I was able to get to the side of the road, the electronic shifter does NOT allow the vehicle to be put into Neutral. This is a known GM issue. This morning the dealer confirmed the engine needs replacement.
I left my house & was driving my truck down the highway for about 2.5 miles. All of a sudden the engine locked up & the battery went dead. I barely coasted off the opposite side of the road where the closest side road is & a semi pasted shortly after. I felt very lucky my truck made it off on the side road instead being run over by the semi truck. I then had to call a weaker & have it towed to the local dealership that services GMC trucks. After 4 days I finally got the worst news, the truck needs a new 6.2 engine. My 2023 GMC Sierra AT4 with 38k miles had an engine that locked up & I was flabbergasted. I started searching this issue on the internet & couldn’t believe how common this is & nothing has been done about this. I would assume a recall from GM would be appropriate considering the sheer number of 6.2 liters engines having issues over & over. This is absolutely unacceptable. I could have been seriously injured or even worse killed by the negligence of GM on this issue. I get it, GM made a mistake with this 6.2 engine and it’s going to cost a lot of money but my research tells me this appears to have been happening for a few years. As I sit here today my truck is sitting in a dealer lot with a busted engine & a new one is on backorder. I am currently driving a dealer “loaner” Chevy trailerblazer. It could be weeks or months before I finally get word on another 6.2 engine replacement from GM. I own a small farm and do not have a truck to haul hay or feed for horses. Can the National highway administration please help me? I thought I was buying a dependable 2023 GMC sierra 1500 AT4 & instead bought a lemon. Apparently hundreds of thousands of other 6.2 liter engines like mine are a HUGE safety hazard & should be recalled. This seems like an open & shut case & after reading into the matter I can’t believe Gov. organizations like the National Highway safety administration has not did more and let GMs 6.2 liter engine contine on. What’s left to investigate?
purchased a 2023 GMC Denali, 1500 on January 12, 2025. after about a week,Started to hear knocking ticking noises took the truck to the dealership with 20,362 miles . dealership diagnosed that the lifters on the driver side went bad dealership replace driver side bank , picked up my truck drove it a little over 500 miles and still heard knocking ticking noises. Send it back to the dealership and dropped it off dealership told me they would keep me an update on it.Emailed called have absolutely no idea what’s going on with my truck. The dealership did mention of a possible engine replacement. But did not confirm after many attempts. Trying to attempt to contact the dealership emails phone calls still no answer. Called General Motors. They informed me the dealership ordered a new engine for replacement. That definitely worried me and I asked for a vehicle replacement or refund General motors, declined my request. Now I am not so confident in my truck what else could go wrong since the engine is going to be replaced? What about the transmission? Could it affect it? I don’t know> The damage was significant in order for the engine to be replaced you just don’t replace an engine just because, there was no light indications that something was going wrong with my truck. I’m glad I wasn’t driving far when I was hearing these noises coming from the engine because the engine could have seized left me stranded who knows could have crashed if the engine came to abrupt stop because of the engine failure. I purchased this truck January 12, 2025 . The total of time that I have had my truck since January 12 has been 15 days. today is February 6 on Friday, February 7. My truck has been in the shop literally 30 days exactly. Still no update on when it will be ready. This is so frustrating and such a big inconvenience.
On the highway, the engine suddenly stopped working. Everything turned black. While driving, the screen turned back on but the motor did not start again. I pressed the breaks and the start button to turn the engine back on, while still driving on the highway. It turned back on but then stopped again before I had time to pull to the side of the road. I did the same again and got to bring the car to the side of the highway. It started and stopped several times. I got it to run again so I exited the highway. It turned off again once I was off the highway. I got to drive it slowly to the dealer. He said it had never happened (which is untrue, I found out it is a recurring problem on the GM 6.2 liter). I had brought the car for service to the same dealership about a week prior to the incident. At that time, I told the dealer that the motor was making subtle weird noises. They serviced the car and gave it back to me stating that everything was ok and that nothing showed on their computer. When I picked up the car after the shutting off incident, I was told that their system showed prior issues but that nothing needed to be done since it was not detecting any problem at the time of pick up. About a week after I picked up my truck (after the shutting off issue was supposed to have been taken care of), I returned because I was still noticing the noise. While on a test drive with a GM mechanic, the motor suddenly started making very loud clicking and squeaking noises. He told me to stop right away. The manager at the dealership told me I would get a new motor because there was a recuring issue with the GM 6.2l. After a week, he said only some parts would be changed and that GM would not replace the whole motor. I told him I did not feel safe driving the truck and he said GM decides what to replace not me. I read online that the motor and all oil filters, ducts etc need to be replaced to avoid debris and future problems. No warning light ever went on. Terrifying experience.
i was driving on the highway and the truck just shut off and rear wheel locked up almost caused me to wreck the truck. got truck pulled to side of the road finally after steering got real tight and very hard to steer to side of road. truck would not even try to start and engine warning light popped up on dash. i had to get truck towed for $243 to turner gmc in new holland, the dealership said it was a known issue since they had 2 trucks in their shop with the 6.2 L engines getting replaced. this was a very scary moment for me and now i have nothing to drive out money from towing and dealer told me it could be a few months before i get truck back. now i will have to pay for a truck that dont run at all.
VIN decoder
See the problems and recalls for an exact car
Buying a used 2023 GMC Sierra 1500?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history