Complaint volume
385 consumer-submitted complaints are matched to this model year. Treat the count as a research signal, then read the actual summaries for repeated symptoms.
Complaint records
2023 GMC Sierra Complaints
385 consumer-submitted complaints on record for the 2023 GMC Sierra, grouped by component category.
385 Total complaints
5 Crash reports
2 Fire reports
1 Injury reports
Complaint data reflects consumer-submitted reports. A complaint is not proof
of a defect, recall, or manufacturer fault. Enriched severity fields come
from official bulk records when the complaint can be matched by ODI number.
Buyer interpretation
How to use these complaints before buying
Complaint records are most useful when they turn into inspection points, seller questions, and comparison checks against nearby model years.
Pattern to inspect
The most common categories are engine, structure, power train. Use those categories as a test-drive checklist instead of judging the vehicle from the total count alone.
Severity flags
Enriched records include 5 crash reports, 2 fire reports, 1 injury report, and 0 fatality reports. These fields come from complaint records and should be read in context.
Mileage clue
Mileage is available on 35 complaints, with an average reported failure mileage of 28,649 miles. Compare that with the mileage on the listing.
Questions to ask the seller
- Have you had any problems related to engine, structure, power train?
- Can I see recent maintenance and repair records?
- Has the vehicle ever been towed, involved in a crash, or repaired for the same issue twice?
- Can we also check the recall record for this 2023 GMC Sierra?
Used-car checklist
Use these complaints before the test drive.
Build a buyer checklist to turn these issues into questions and inspection points.
2023 GMC Sierra
Build buyer checklist Compare with other years Sends year, make, and model to pre-fill your checklist.
How severe are the 2023 GMC Sierra complaints?
5 Crash
2 Fire
1 Injury
0 Fatality
11 Towed
0 Medical attention
What are the most common 2023 GMC Sierra complaint categories?
ENGINE 120
STRUCTURE 44
POWER TRAIN 40
UNKNOWN OR OTHER 23
ENGINE AND ENGINE COOLING 18
ELECTRICAL SYSTEM 16
POWER TRAIN,ENGINE 14
ENGINE,FUEL/PROPULSION SYSTEM 7
FUEL/PROPULSION SYSTEM 6
EXTERIOR LIGHTING 5
385 total complaints on record
Latest complaints
| Date | Component | Summary | Severity | Mileage |
|---|---|---|---|---|
| Mar 2025 | ENGINE | 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. | Crash: No Fire: No | Unknown |
| Mar 2025 | ENGINE AND ENGINE COOLING | 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 NHTSA Action Number: PE25001 (Engine and Engine Cooling). The manufacturer was not made aware of the failure. The failure mileage was approximately 23,000. | Crash: No Fire: No Towed | 23,000 |
| Mar 2025 | POWER TRAIN,ENGINE | 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) | Crash: No Fire: No | Unknown |
| Mar 2025 | ELECTRICAL SYSTEM | The truck check engine lights came on, and I took it to a dealer. I was told the ECM was faulty, they replaced it, but it didn't fix the issue. I was then told the ONSTAR telematics unit was faulty. The truck has been down for 45 days, with no ETA on parts(several forms say 4-6 months). There is no guarantee that this will fix the CEL. The truck is inoperable at this time. | Crash: No Fire: No | Unknown |
| Mar 2025 | POWER TRAIN,ELECTRICAL SYSTEM | While entering the highway from a downward slop exit ramp and towing a trailer, my truck shuddered hard and briefly locked up the rear axle. It immediately went into limp mode with a message that driving speed will be reduced. It also wouldn't shift past 5th gear. When the event took place, the OBD2 generated over 20 trouble codes. My local dealer advised I could drive it to them for repair. Upon dropping it off, they now advise it's NOT safe for driving and they have no eta on the parts to repair the issue. It's now been at the dealer for a week with no update. This is a well known issue that GM refuses to repair or provide a reasonable timeframe for repair. There are countless videos such as this one that show what happens when this takes place. [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) | Crash: No Fire: No | Unknown |
| Mar 2025 | POWER TRAIN,ENGINE | 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. | Crash: No Fire: No | Unknown |
| Mar 2025 | ENGINE | 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 | Crash: No Fire: No | Unknown |
| Mar 2025 | ELECTRICAL SYSTEM,STRUCTURE | Tailgate opened/unlocked while parked during rain and light snow. The tonneau cover disguised that the tailgate was open (held it up just enough so it was not visable). The tailgate fell open while driving but went unnoticed. Several large and expensive items were lost out of the back of the truck which is used as a work truck for electrical services. This has happened twice on the roads. Now the tailgate is physically checked before driving to ensure it will not fall open. The incident was mentioned to the local GM dealer but we were told our model was not part of the recall. Our next call will be to GM directly to try to remedy the problem and hopefully recoup the items lost. | Crash: No Fire: No | Unknown |
| Mar 2025 | ENGINE | 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. | Crash: No Fire: No | Unknown |
| Mar 2025 | ENGINE | 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. | Crash: No Fire: No | Unknown |
| Mar 2025 | ENGINE | 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? | Crash: No Fire: No | Unknown |
| Mar 2025 | EXTERIOR LIGHTING | Flickering of daytime running lights. | Crash: No Fire: No | Unknown |
| Mar 2025 | ENGINE | 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. | Crash: No Fire: No | Unknown |
| Mar 2025 | POWER TRAIN,ENGINE | 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. | Crash: No Fire: No | Unknown |
| Mar 2025 | ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM | 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. | Crash: No Fire: No | Unknown |
| Feb 2025 | ENGINE | At 9,100 miles my 2023 pickup truck experienced engine failure. It was inspected by dealership in the town where truck was purchased and it is determined that it will need a new engine due to "bearing failure". This occurred 2/24/25. No indicators or warning messages appeared. | Crash: No Fire: No | Unknown |
| Feb 2025 | ENGINE | The contact owns a 2023 GMC Sierra 1500. The contact stated that while his wife was driving 60 MPH, the vehicle came to an abrupt stop, and the engine was seized. There were no warning lights illuminated. The driver was stranded on the highway for approximately two hours. The vehicle was towed to the local dealer, where it was diagnosed that the camshaft bearing had disintegrated. The vehicle was not repaired. The manufacturer was contacted and opened a case. The failure mileage was approximately 22,872. | Crash: No Fire: No Towed | 22,872 |
| Feb 2025 | ENGINE | I started truck and engine light came on.Coolant fan went super loud and would not stop at high speed. Code P1098 was seen.The dash read reduce acceleration drive with care.I had to have vehicle towed to GMC dealership. | Crash: No Fire: No | Unknown |
| Feb 2025 | ENGINE | The engine has blown for the 6.2L V8 Denali with 31,300 miles. I was told that this is happening on several of these engines. They told me it would be 3-4 months for repair as the engines are on backorder. I am not able to use a truck that I have purchased and am paying on. | Crash: No Fire: No | Unknown |
| Feb 2025 | ENGINE | Complete engine failure confirmed by GMC dealership service technicians. Incident Details: On [XXX] while driving at approximately 45-50 mph on [XXX] , my vehicle suffered a complete engine failure without warning. This resulted in sudden loss of power, inability to accelerate, no warning lights, near-accident, and the need to pull over in unsafe conditions. This failure placed me and my son, as well as others on the road at risk of serious harm and has left me with no confidence in this vehicle’s long-term safety and reliability—even with an engine replacement. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) | Crash: No Fire: No | Unknown |
| Feb 2025 | POWER TRAIN | Valve Body. While driving the vehicle, hard shifts occurred; the vehicle check engine light came on and stayed on while the vehicle went into limp mode. I was able to link to the GMC dealer. The dealer was not and would not inspect the vehicle at that time. I was told I needed to leave or return in two for inspection. The left vehicle was inspected the next day and determined as a value body. The GMC dealer found the part in another state and has the part shipped. I installed the part, had the GMC dealer search it, and performed a recall update. | Crash: No Fire: No | Unknown |
| Feb 2025 | ENGINE | Driving on a road. Suddenly the engine shut off and would not turn back on. I was stuck in the middle of the road with out the ability to put the truck in neutral to push it out of the way. | Crash: No Fire: No | Unknown |
| Feb 2025 | ENGINE | I was driving on the interstate and the vehicle just shut off with a warning stating conditions not right to shift. I had to drift off the interstate and the vehicle would not restart. This happened on 12/4/24 and has been at the dealership since. | Crash: No Fire: No | Unknown |
| Feb 2025 | POWER TRAIN | Transmission Light has been on & off for a month and half. Had it at dealer twice, dealer will not confirm a problem. Truck shifts and bucks between first and second gear. Makes stopping in traffic difficult as truck will surge and jump when down shifting while stopping. Took truck to AAMCO Transmission shop. Confirmed problem, no new transmission units or rebuild parts are available for the GM 8 Speed transmission. AAMCO is replacing unit with a used one. This is a company truck also have a second truck having the same issues with half the miles of this unit. In my opinion GM is aware of the issue in that with both trucks at dealer with same issue, they just send me off with no documentation so as to not have a paper trail. Also no new units available makes me believe that GM can not keep up with warranty replacements. | Crash: No Fire: No | Unknown |
| Feb 2025 | POWER TRAIN,ENGINE,FUEL/PROPULSION SYSTEM | Driving truck at highway speed and went to pass a group of slower vehicles on my right. I increased speed to 75 mph and the engine stopped and I had no acceleration. Engine would not shift into Neutral and would not restart. I coasted off to an exit ramp and the truck stopped in the middle of it blocking traffic for about an hour. Highway Patrol was on site to help direct traffic through the intersection of the off ramp and side road. We sat for approximately an hour before a tow truck could get us out of the intersection. The truck transmission was locked tight and the tow truck had to put the back wheel on skates to move it. I had to pay $175.00 to this tow truck company to move me approximately 200 yards to a local restaurant where we waited for the GMC provided tow service to arrive. GMC provided tow truck would only tow to nearest dealership which was in Weimer, TX. At the time of failure there was no warning. The truck just shut down making loud wining noises since the transmission was still in gear. This was an extremely stressful event and I was worried that someone was going to strike us at highway speed from the rear. Traffic was heavy that day on [XXX] heading [XXX] towards San Antonio and most left lane speeds were 75-80 mph and bumper to bumper traffic. The GMC Dealer in Weimer was very professional and inspected the engine on Dec 2nd notifying me that is was a total failure and would need to be replaced under warranty. The dealer had a new engine in hand within a few days and the truck was repaired with two weeks. I had a couple other issues with the OnStar system and the wireless after I picked up the truck and drive it home. I returned it to the dealer and proper parts were ordered to replace a bad control module that had failed during the engine failure. It took some additional time on my own after this was replaced to get my OnStar account back up and running correctly. This truck also had "tailgate drop" issues that the dealer fixed. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) | Crash: No Fire: No | Unknown |