2025 GMC Sierra 1500 engine problems

Related recalls

No recalls on file.

What owners say

1. Filed Oct 2, 2026TXBrakesDriver Assistance & Safety TechEngine

   Electronic braking system failure. Vehicle was put in limp mode with a top speed of 62 mph. Vehicle had very little or no braking . Vehicle has less than 13,000 miles . I am the original owner.

   NHTSA complaint #11768518 · source
2. Filed Sep 17, 202634,637 miMOTowedElectrical SystemEngineTransmission & Drivetrain

   The contact owns a 2025 GMC Sierra 1500. The contact stated that while driving approximately 5 - 10 MPH, the vehicle went into LIMP Mode and failed to properly accelerate, and the transmission unexpectedly downshifted. There was an electrical malfunction, which caused the transmission to downshift. An unknown message was displayed on the instrument panel. The contact stated that the network was not operating at the correct voltage due to the wiring harness. The engine light…

   NHTSA complaint #11765016 · source
3. Filed Sep 9, 2026NVElectrical SystemEngine

   When updating the vehicle as prompted by the entrainment system the next day when attempting to start the vehicle it did not start. Vehicle had to be jumped then 6 warning lights came on and disappeared shortly after driving.

   NHTSA complaint #11763207 · source
4. Filed Sep 8, 2026PAEngine

   On XXX my 2025 gmc sierra 6.2L v8 engine experience catastrophic engine failure with no preexisting alerts or warnings. It was towed to Baglier gmc in [XXX] on XXX and is currently awaiting diagnostic evaluation. Upon restarting the vehicle after failure, the engine light did turn on. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

   NHTSA complaint #11762694 · source
5. Filed Sep 3, 2026KSEngine

   So I spent many months trying to aquire a GMC Sierra Denali and with all the issues with the 20 - 24 6.2 engines we were assured by the dealer that all the issues were resolved with the 2025 6.2 models. So we spent big to aquire an 2025. So I bought one new. My truck had 8000 miles on it with 2 oil changes. So we booked a trip to [XXX] at considerably a large expense and loaded up our Harley's on my light aluminum trailer, less than 3.5k pounds and headed that way from…

   NHTSA complaint #11762000 · source
6. Filed Aug 29, 2026TXEngine

   Engine making noise during a trip took to dealership and they reported engine is bad and needs to be replaced because it would freeze on the road. Vehicle has 7000 miles.

   NHTSA complaint #11760628 · source
7. Filed Aug 29, 2026TXEngineOther / UnknownTransmission & Drivetrain

   Engine started knocking at 18k miles and took to dealer and they found metal in the filter and installed a new engine and also replaced the midplate gasket on the valvebody due to a harsh downshift without codes in the system this engine is going on 2k miles and it seems to be fine now but the problem with 6.2 was only supposed to be on the 21-24 models and mine is a 25 model and already had a replaced and nothing from gm was said to extend the warranty on this model and…

   NHTSA complaint #11760587 · source
8. Filed Aug 29, 2026AREngine

   FROM DEALER ASSESSMENT Concern - CUSTOMER STATES WHEN VEHICLE IS ACCELERATING THERE IS A RATTLE Correction - test drove and was able to duplicate rattle/knocking from the engine. checked oil level and condition verified both are good. checked for bulletins and followed 23-NA-170. compared vehicle noise to noise is video and noise is nearly identical. removed oil filter and inspected for debris, found heavy amounts of metal debris present in the filter. performed crankshaft…

   NHTSA complaint #11760562 · source
9. Filed Aug 28, 2026LAEngineAcceleration & Cruise ControlTransmission & Drivetrain

   I own a 2025 GMC Sierra 1500 Denali equipped with the 6.2L V8 L87 engine, VIN [XXX]. The vehicle had approximately 35,000 miles when the engine experienced a catastrophic engine failure. Prior to/during the failure, the vehicle experienced abnormal engine noise and a loss of power. Multiple warning/alarm lights appeared on the dashboard, including the Check Engine and Traction Control warning lights. The engine failure resulted in a loss of motive power and made the vehicle…

   NHTSA complaint #11760197 · source
10. Filed Aug 26, 2026LAEngine

    Engine shut off. It did restart after placing it in park. I did own a 2022 Sierra Denali and the motor failed on that vehicle. I swapped out to the 2025 to get away from what I thought was a problem on that vehicle and now learning this is an inherent problem with the 6.2L motors that include this year. As a consumer, I am very infuriated that the problem has been in place for years and still is today. The DOD system in these motors is also a problem and will eventually rear…

    NHTSA complaint #11759705 · source
11. Filed Aug 24, 2026ILEngine

    The 2025 GMC Sierra 1500 with 18,675 miles and the 6.2 gas engine failed during a road trip. I was on my way from [XXX] to [XXX] on the Interstate when about 7 hours in, just outside [XXX]. I was noticing a lack in power when I pulled out of a rest area. The truck would not accelerate over 60mph. I slowed down and as I was pulling off the side of the interstate, the truck died. There was knocking sound as I started to pull over. I attempted to restart the vehicle; it did not…

    NHTSA complaint #11759266 · source
12. Filed Aug 22, 2026FLEngine

    One evening while driving home from work, the transmission warning light illuminated on my dashboard, indicating that the vehicle would soon stop. The notification specifically stated there was a transmission problem. The following morning, I brought my truck to GMC for service. After running a diagnostic, GMC confirmed an issue with the transmission. A few days later, GMC informed me that they were waiting for a replacement part to arrive. The part did not arrive for almost…

    NHTSA complaint #11758808 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology