2021 GMC Sierra 1500 electrical system problems

Related recalls

No recalls on file.

What owners say

1. Filed Oct 1, 2026INElectrical SystemEngineTransmission & Drivetrain

   Received Re-Call for Engine Failure! Dealer replaced Engine Oil and Oil Cap @ 85,544 Miles. I read of the Re-call prior to the notice and I waited for it to come. After I received it and the Dealer made the changes, it made me afraid to leave town using my truck for fear of a breakdown on the Freeway. I use a Walker, so if I broke down and I was in the left lane and lost all power it would be very dangerous for me to get to the right side of the road! The truck started using…

   NHTSA complaint #11768259 · source
2. Filed Sep 28, 202698,000 miOK1 injuredElectrical SystemEngine

   The contact owns a 2021 GMC Sierra 1500. The contact stated that while the vehicle was parked, the battery charge indicator to zero. The vehicle lost motive power, and the vehicle was unable to exceed 30 MPH while driving. The vehicle was driven in LIMP Mode. The battery saver mode message was displayed before and during the failure. The vehicle then failed to restart. The vehicle had been repaired a year prior to the failure. The contact's blood pressure became elevated due…

   NHTSA complaint #11767454 · source
3. Filed Sep 15, 2026TXElectrical SystemAcceleration & Cruise Control

   Dashboard keeps returning to aljarir type writing. We bought it with American English but won't stay in English. Monday will be 30 day and I believe the dealer is ghosting me. Y'all have any ideas how to reset the dashboard without replacing the radio??? Closest answer I was given.

   NHTSA complaint #11764558 · source
4. Filed Aug 27, 202689,000 miLATowedElectrical System

   The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving approximately 25 MPH near the residence with the contact's daughter as a passenger, the vehicle experienced a complete loss of motive power when depressing the accelerator pedal. Several unspecified warning lights illuminated. The contact and the passenger pushed the vehicle to the residence. The vehicle was towed to an independent mechanic, where it was diagnosed that the electrical system…

   NHTSA complaint #11759956 · source
5. Filed Jul 14, 2026INElectrical SystemEngineFuel, Hybrid & EV Propulsion

   I am submitting supplemental evidence regarding my 2021 GMC Sierra (VIN [XXX]) for Recall Query RQ26001, Campaign 25V-274. Despite multiple repair attempts, my vehicle remains unsafe and non-compliant with GM Service Bulletin N252494002. The recall remedy was performed deficiently. [XXX] Northeast Buick GMC installed a remanufactured short block instead of the required complete engine, reused the original seized-engine oil pan (which continues to leak), and failed to address…

   NHTSA complaint #11750329 · source
6. Filed Jul 7, 2026WIElectrical SystemEngine

   I own a 2021 GMC Sierra AT4 3.0L Duramax (VIN [XXX]). The vehicle has codes P1098 (Coolant Control Valve Performance) and P129F which coincides with the first code. My dealer believes this is consistent with an Engine Coolant Control Valve failure. I understand Special Coverage XXX exists for this issue, but I've been told my VIN is not included. My truck has the exact engine, symptoms, and diagnostic codes addressed by Special Coverage N252508341, but my VIN is excluded.…

   NHTSA complaint #11748812 · source
7. Filed Jun 26, 2026MODriver Assistance & Safety TechElectrical SystemOther / Unknown

   When I put the vehicle in park, the dash warning says it is not in park or shift to park. The components continue to work. I have taken it to the dealership and according to the service manger, this is a very common occurrence in these trucks. This seems to me that it would be a very serious safety issue if one assumes their vehicle is in park and it is actually not. The shift to park warning is a safety warning to alert the driver it is not in park so the vehicle doesn’t…

   NHTSA complaint #11746746 · source
8. Filed Jun 16, 2026TXElectrical SystemFuel, Hybrid & EV PropulsionTransmission & Drivetrain

   So I made an appointment to have my truck recalled and the Wednesday before I took it, and it cranked no start and I called the dealership. Ask if they had any other those like this and they said that it could be the fuel injector module and so I got it to a mechanic shop to read the codes and it gave me a code p062b and I asked the dealership to look into it and they never figured out what we were not wrong. I just testing the battery. Well, then I got it back after the…

   NHTSA complaint #11744628 · source
9. Filed Jun 1, 2026AZElectrical SystemSteeringTransmission & Drivetrain

   power steering locked up while driving. multiple dash lights turned on, on its own after the issue, 4wd, emergency brake, abs, and other ones im not sure what they are. took it to the dealership for a recall and told them the issue that happened.

   NHTSA complaint #11741189 · source
10. Filed May 25, 2026SCElectrical SystemFuel, Hybrid & EV PropulsionSteering

    My truck will not start when I press the push-button ignition. After waiting a few seconds and trying multiple times, it typically starts on the third attempt. Additionally, it will not restart after the auto stop feature activates at stop signs or traffic lights. This is very concerning, especially when pulling into oncoming traffic, as I’m worried the truck could shut off while I’m crossing. I have already had the battery, starter, and alternator checked, and all…

    NHTSA complaint #11739883 · source
11. Filed May 22, 2026GAElectrical SystemSteering

    Shift to park dings continuously and vehicle won’t turn off draining battery leaving doors unlocked. Don’t want to force into park and break anything more.

    NHTSA complaint #11739515 · source
12. Filed May 19, 2026INDriver Assistance & Safety TechElectrical SystemEngine

    2021 GMC Sierra AT4, VIN [XXX] , NHTSA Campaign 25V-274, GM Case XXX. Brake pad monitor failed at 128,923 miles -- 24 miles after leaving Penske Chevrolet (released at 128,899, RO XXX, 04/17/2026). Brakes became spongy immediately following service. Monitor disabled entirely to stop recurring red Service System alert. Root cause is a burnt fuse block ground fault confirmed in writing by two GM-authorized dealers. Ray Skillman (RO XXX, 06/05/2025) documented the fault then…

    NHTSA complaint #11738685 · 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