2023 GMC Sierra 1500 Problems

My vehicle has now been at the dealer two times for issues with the engine. The first time they said my lifters needed to be replaced. They rebuilt the engine to replace the lifters and other engine parts. I picked the truck up and two days later I was driving home and the engine quit on me and I had to pull to the side of the road. I tried to restart the vehicle several times and then it started up, but only for one more mile and it completely went out again and would not restart. It had to be towed to Shumacher GM dealer in West Palm Beach. This definitely put my safety at risk since the truck shut down while driving. It seems that GM is having major issues with their engines. It is presently being inspected by the dealer and GM. I have not heard back of what the issue is, but I believe the engine will need to be replaced. I did not receive any warning messages or had no clue that the engine was going to shut down.

Information related to GMC 25V274 recall for 2023 GMC Sierra 1500 6.2L. Recall oil change inspection and change of oil to higher viscosity performed summer of 2025 (prior to my ownership). On May 17, 2026 the Truck lost engine power without warning and would not start again. Fortunately I was on a road and location where I could coast into a parking lot, but again the vehicle provided no advanced warning of any issue. Towed truck to dealership and determined that exact engine problem noted in recall had indeed occurred to engine. So GMC recall efforts to inspect and change oil had NO effect on the engine defect. Engine was replaced.

The bezel that attaches to the top of the grill flew off while I drove down the interstate. It went over my truck and almost hit the car behind me and in the lane next to me. The mounting points failed and most of them as still connected to the grill. The grill has some broken plastic mounting and several cracks in the grill around the connection points. I took the truck to the GMC dealership and they looked at it then told me to contact GMC. I have dashcam video (front and rear) of the part detaching and traveling back into traffic behind me.

Grill/exterior parts flying off

The contact owns a 2023 GMC Sierra 1500. The contact stated that while performing an oil change at the residence, the contact became aware that the transmission cooling system was inoperable and that the transmission cooler lines were leaking. The vehicle was taken to the dealer, where it was diagnosed and determined that the cooler bypass valve and seal had failed and needed to be replaced. The vehicle was not repaired. The contact stated that the vehicle was scheduled to be repaired at a service center. The failure mileage was approximately 79,000.

The shifter shorted out. This gave me one message, Service transmission right away. I drove 10miles home & scheduled service right away. The next day I started truck up and it said unable to shift soon. This is a wide known problem with the GMC Sierra. How many people have to sit on the side of the road with this known defect.

600 miles and 3 months out of warranty the dash completely disappeared. Dealership says the costs is in excess of $1600 to fix the issue. I have researched this and it is a common problem with these trucks and it needs an instrument cluster. Given the fact that GMC controls the panels to these trucks I feel certain that this is actually caused by them and should be fixed under a recall. We have owned the truck 6 months. We are not able to see the speed limit, gas limits or anything on the dash any longer.

2 issues. The radio will go blank and not work regardless of the method using to listen. Example- Sirius/XM or FM/AM. The vehicle will accelerate/jerk forward/backward dramatically compared to the pressure on the pedal. Scared to let anyone else operate the vehicle to prevent accident. Scared to back up to a camper or trailer because it is unpredictable how far it will jerk. No alerts or warnings. Has been taken to the dealer shop many occasions. Accelerator pedal has been replaced. Transmission reprogrammed. The radio/electronics has been updated on multiple occasions. Still both problems exist. GM has been contacted and there is an open case; however, still not resolved. This issue began when purchased in 2023 and continues in 2026. Neither the dealer nor GM seem to have a solution.

Recall: The GM 6.2L V8 (L87) Engine Safety Recall (Recall No. 25V274000) May/June 2025 Purchased Vehicle:[XXX] Recall “Fixed”: [XXX] passed the Pico test @ Findlay GMC, Prescott, AZ Oil Consumption: [XXX] - Used 3 qts oil over 7k miles Was informed by Dealer that the accepted rate of oil consumption was 1 qt per 2k miles Engine Failure: [XXX] - Catastrophic Engine Failure (Low Engine Oil Pressure) resulting in total lack of propulsion and shutting down of engine while traveling 65mph towing a trailer Towed: [XXX] to Findlay GMC, Bullhead City, AZ INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

On [XXX], at around [XXX] my 2023 GMC Sierra 1500 Elevation suddenly lost power while I was driving eastbound on [XXX]. The battery was still running, but the engine lost power and the accelerator did not respond and the truck would not move. I was stranded in the roadway. OnStar emailed me about a critical vehicle issue and reported DTC P129F. Because the truck was stopped in a live lane of traffic, I called 911. Responders blocked part of the road to protect me and to give the tow truck room to recover the vehicle. No one was injured, but this could easily have caused a serious collision. A few days later, I had the truck towed to Seaview GMC in Lynnwood, WA. The dealer diagnosed an internal failure of the fuel pump power control module, the K111 Fuel Pump Driver Control Module mentioned in the GM Bulletin earlier this year. This matches a known issue described in GM Service Bulletin 24-NA-139, which covers DTCs P129F and P023F and lists 2023 Sierra 1500 models. The bulletin describes symptoms including no-start and stalling. The dealership has attempted to charge me $200 for diagnosis and $261 for the fuel pump module. I had asked them if this was covered under warranty, they responded that they would check with their warranty specialist. This conversation happened at the Seaview GMC Dealer approximately 5pm on [XXX]. The informed me they would call the next day to confirm if this is covered or not covered by warranty. I am reporting this because a sudden loss of power while driving on a highway is a serious safety risk. I am concerned that other owners may experience the same failure at highway speed, and I would like NHTSA to review this issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Upon 1st start-up collision warning system light comes on and system is disabled. I shut the truck off immediately and restart it and the collision light goes off and the system functions like normal until the next shut off and restart.

The contact owns a 2023 GMC Sierra 1500. The contact stated that while the vehicle was in reverse(R), the rear-view camera froze and occasionally glitched. The failure was a recurring failure. The contact associated the failure with Technical Service Bulletin: PIT6369B. The dealer was contacted. The manufacturer was contacted and made aware of the failure. The failure mileage was approximately 60,000.

My 2023 GMC Sierra 1500 SLT 4WD currently at 67659 miles was taken in to the dealer because of excessive jerk when accelerating or trying to reverse, diagnostic scan failed for check engine and ABS trouble codes. The scan return code PO747 indicating transmission pressure control solenoid “A” was stuck on for a predetermined period of time. The recommended repair is replacement of automatic transmission, solenoid control valve body. I’m aware that GM has issued a TSB 25–NA-255 and special coverage N24245441–02 addressing this exact failure on the GM 10 speed and that GM previously issued a related recall N242454440 addressing this exact failure on the GM 10 speed transmissions, and that GM previously issued a related recall for this citing rear wheel lock up risk associated with transmission valve condition. My vehicle scan showed an ABS failure at the same time as a transmission. code, consistent with the safety risk. GM has already acknowledged and its own recall documentation however I was told to contact NHTSA to document the safety risk and request investigation of the scope of this defect across affected models years and vehicles as mine seems to have fallen short. I previously owned a 2021GMC vehicle same model that experience the identical transmission valve body failure that vehicle could not be repaired in a reasonable time and I ultimately experience financial loss and had to replace a vehicle now I’m experiencing the same defect on the vehicle purchased (this one) with significantly fewer miles than would be expected for a major transmission failure, indicating that this may be a reoccurring manufacturing design defect rather than an isolated incident. Thank you for your time and I hope this issue can be resolved as I do love the truck otherwise however safety first. Thank you

The contact owns a 2023 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the brake pedal was depressed; however, the brakes failed to respond as needed. The vehicle was towed to the dealer to be diagnosed. The vehicle was diagnosed with an inoperable battery, which caused the brake module to fail, preventing the brakes from operating as intended. The vehicle was repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 29,000.

For the second time within a year , I am having power steering failure. I replaced the power steering motor and eps module and it is giving me issues with turning. At start up it gives me a warning light saying service power steering and power steering assist reduced.

On Oct 11,2026, at approximately 105,106 miles, I was driving my 2023 GMC Sierra 1500 under 20 mph while entering a short designated turning lane at [location]. I felt a sudden, unexpected bump or jolt. The truck slid slightly and abruptly came to a complete stop, as though something had mechanically locked up. Immediately afterward, the dashboard displayed a “Braking System Failure” warning. A front wheel appeared collapsed underneath the truck, with substantial visible damage to the front suspension and surrounding components. The specific component that failed first and the initiating cause are UNKNOWN. I did not knowingly strike a curb, pothole, road debris, another vehicle, or another object before the incident. The truck has no aftermarket lift or leveling kit. I purchased it less than two weeks before this occurred. The wheel collapse, sliding, and sudden stop compromised my ability to safely control the truck and created a risk of collision with surrounding traffic. A similar event at higher speeds could have caused a serious crash. The truck is being towed to the selling dealership, which is covering the towing cost. I am seeking an independent GMC inspection and requesting preservation of damaged components and diagnostic data. Inspection availability can be coordinated with me and the dealership. At the time of this report, I have not received a confirmed mechanical diagnosis. Inspection by the manufacturer, police, insurance representatives, or other parties: [state who has inspected it, or UNKNOWN]. The braking warning appeared immediately after the sudden stop. Earlier warning lights, messages, or symptoms: [describe any, state NONE if accurate, or UNKNOWN]. Photographs are available. I can provide inspection findings when available.

1 - The Engine or something electrical, possibly the ECM, failed or malfunctioned, and yes, it is available for inspection. 2 - The vehicle lost power, reduced speed, was hard to steer, and I couldn't put the hazard lights on; this occurred twice while driving on the highway, once I was driving at approx 75 mph. The results could have been catastrophic not only to myself but to others on the road. These two events are not the only times the truck did this. 3 - No. 4 - No. I filed a claim with GM, but it has been approximately a month, and I've received no updates. 5 - No. Further: This event has occurred 6 times. I've taken it to the dealership three. They cannot duplicate the issue, so no repairs have been done. Apparently, approximately 100 codes come up, but they cannot diagnose the problem.

While driving in the rain, the windshield wipers were on the highest intermittent setting and the high beam headlights were also on, automatic highbeams were not. The high beam lights dimmed to low, and the windshield wipers stopped in the middle of the windshield in the middle of navigating a sharp right hand turn at 35mph. The wipers stopped for approximately 30 seconds and then resumed operation. When the wipers resumed operation, the headlights also turned back on high with no input from the driver.

The plastic upper rail glass guide frame on the rear sliding window assembly of my 2023 GMC Sierra developed structural micro-cracks during normal vehicle operation. This manufacturing defect is a known issue tracked internally by the manufacturer under Technical Service Bulletin (TSB) #18-NA-383.This structural failure allows severe water intrusion into the passenger cabin. The leaking water runs straight down the inside back wall of the cab, completely flooding and corroding sensitive, factory-installed electronic safety modules mounted directly beneath the leak path.This continuous water intrusion caused the catastrophic electrical failure and corrosion of the video processing control module located behind the rear seat. The sudden failure of this module completely disabled the rearview digital mirror camera and the 360-degree perimeter driver assistance cameras, creating immediate blind spots and an active driving safety hazard while operating the vehicle.The vehicle was inspected and repaired by an authorized dealership, confirming the rear window leak as the direct cause of the electronic destruction. The out-of-pocket cost to replace the water-damaged safety components was $2,747.00. Because the manufacturer refused to cover the replacement of the defective rear glass assembly, the structural leak remains unresolved. This active water intrusion continues to flood the cabin, creating a health hazard via mold growth and guaranteeing that the newly replaced safety cameras will inevitably short-circuit and fail again.

While driving in the rain, the windshield wipers were on the highest intermittent setting and the high beam headlights were also on, automatic highbeams were not. The high beam lights dimmed to low, and the windshield wipers stopped in the middle of the windshield in the middle of navigating a sharp right hand turn at 35mph. The wipers stopped for approximately 30 seconds and then resumed operation. When the wipers resumed operation, the headlights also turned back on high with no input from the driver.

the styrofoam part on the side rest area, is broken .. When cleaning and setting back together, shouldn’t be a problem. Wish it was a different material, since my baby needs to be protected from that. Also putting it in the car, we all touch that part and it’s not so sturdy. When we hit the brake, we held it for extra security and noticed it broke when we got home, and i unassmebled it to check.

On several occasions this Saris Superclamp bike rack has dropped from an upright position to a tilted position when there is a bump/dip in the road. A driver following has later reported to me that the rack/bikes falling quickly startled him and led to him braking. The bikes have not fallen from the rack when it drops down but I am concerned about the possibility. I have contacted the manufacturer and they will send me parts to repair if I can provide the original sales slip which I can not find. The part is available for purchase for $200 which is nearly half the cost of the rack. I have communicated to the manufacturer that this defect is a safety hazard and they should rectify the issue at no cost. They have refused.

The contact owns a 2023 GMC Sierra 1500. The contact stated that while her husband was driving at various speeds, the rear liftgate door erroneously opened. The vehicle was taken to the local dealer who diagnosed that the exterior touchpad switch assembly was faulty and needed to be replaced. The touchpad switch assembly was replaced, and the vehicle was repaired. The manufacturer was notified of the failure and informed the contact that the VIN was not included in NHTSA Campaign Number: 24V060000 (LATCHES/LOCKS/LINKAGES). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 35,000.

The contact owns a 2023 GMC Sierra 1500 equipped with a Roll-N-Lock tonneau cover. The contact stated that the tonneau cover failed to lock and latch securely since the vehicle was purchased brand new. The vehicle was taken to the dealer, where unknown repairs were performed; however, the failure persisted. Additionally, the contact stated that the latching part of the tonneau cover was missing an inch-long piece. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

On Oct 11,2026, at approximately 105,106 miles, I was driving my 2023 GMC Sierra 1500 under 20 mph while entering a short designated turning lane at [location]. I felt a sudden, unexpected bump or jolt. The truck slid slightly and abruptly came to a complete stop, as though something had mechanically locked up. Immediately afterward, the dashboard displayed a “Braking System Failure” warning. A front wheel appeared collapsed underneath the truck, with substantial visible damage to the front suspension and surrounding components. The specific component that failed first and the initiating cause are UNKNOWN. I did not knowingly strike a curb, pothole, road debris, another vehicle, or another object before the incident. The truck has no aftermarket lift or leveling kit. I purchased it less than two weeks before this occurred. The wheel collapse, sliding, and sudden stop compromised my ability to safely control the truck and created a risk of collision with surrounding traffic. A similar event at higher speeds could have caused a serious crash. The truck is being towed to the selling dealership, which is covering the towing cost. I am seeking an independent GMC inspection and requesting preservation of damaged components and diagnostic data. Inspection availability can be coordinated with me and the dealership. At the time of this report, I have not received a confirmed mechanical diagnosis. Inspection by the manufacturer, police, insurance representatives, or other parties: [state who has inspected it, or UNKNOWN]. The braking warning appeared immediately after the sudden stop. Earlier warning lights, messages, or symptoms: [describe any, state NONE if accurate, or UNKNOWN]. Photographs are available. I can provide inspection findings when available.

Leaking Diesel fuel, Leaking oil from the rear of the transfer case, making a claunking noise at the rear suspension, My safety is at risk for a possible fire and a crash from the Leaking oil. The vehicle was diagnosed with this problems on [XXX] at Caguas Chevrolet & GMC, also called United Collection Auto. parts were ordered on that date but not arrived. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Subject: Safety Complaint Regarding Steering Airbag Trim and Steering Axle Issues Dear National Highway Traffic Safety Administration (NHTSA), I am writing to formally file a complaint regarding serious safety issues with my GMC vehicle. Specifically: 1.The steering airbag trim has begun to crack, which raises concerns about its structural integrity and potential interference with airbag deployment in the event of a collision. 2.The steering axle is making unusual noises due to loose bolts and worn bushings, posing a potential risk to steering control and overall vehicle safety. I recently took the vehicle to an authorized GMC dealership for inspection and repair. However, the dealership refused to address these issues despite their clear impact on safety and their apparent connection to manufacturing defects. Given the critical nature of these problems, I urge the National Highway Traffic Safety Administration (NHTSA) to investigate this matter thoroughly. These defects not only compromise the safety of the vehicle but also endanger the lives of the driver, passengers, and others on the road. Thank you for your attention to this matter. I am happy to provide any additional information or documentation required for your investigation.

Warning light stated “Vehicle Restraint System requires Service”. Dealership looking into warning light.

The infotainment system loses all audio through the speakers intermittently. when this happens I also lose the Safety warning chimes as well. shutting off the vehicle for an extended period of time resets something and it resumes normal function. I have contacted GM customer service and spoke to 3 different representatives and requested an escalation to a Senior Advisor, which i was told could take up to 4 days to hear back. the vehicle has 800 miles and is 1 month old, this has occurred 4 times. it has not been looked at by the manufacturer as i am waiting for return communication. Other than no sound, everything else on the touch screen seemed to be working normal, but im no technician to determine that. i feel this is a safety concern as i travel with my 13 month old daily.

The contact owns a 2023 GMC Sierra 1500. The contact stated that while driving on several occasions at speeds above 30 MPH, the vehicle shuddered abnormally. There was no warning light illuminated during the failures. The vehicle was taken to a dealer, where it was diagnosed, and determined that the valve body needed to be replaced. The vehicle was repaired, but the failure recurred approximately six months later. The manufacturer was notified of the failure. The failure mileage was 81,000.