CarRecallWatchThe 2021 GMC Sierra 2500 has 6 safety recalls on file with NHTSA.
Owners have filed 52 complaints with NHTSA, including 4 crashes, 1 fire, 1 injury.
The most-reported problem area is Power Train (13 reports).
2021 GMC Sierra 2500 recalls
Rear Wheels Can Lock Up, Raising Crash Risk
Certain 2020-2021 GM full-size pickups and SUVs equipped with diesel engines may have a transmission control valve that can fail.
Tailgate May Unlatch While Parked, Risking Open Tailgate on the Road
The electronic gate-release switch on the power-unlatching tailgate can short circuit when water gets into it.
Water Can Short Brake Module and Cause Fire Risk
Some 2021-2022 Chevrolet Silverado and GMC Sierra 2500 and 3500 trucks were built with an electronic brake control module whose brake pressure modulator valve bolts may not be properly tightened.
Spare tire can disable anti-lock brakes, raising crash risk
Certain 2020-2021 Chevrolet Silverado 2500 and GMC Sierra 2500 trucks equipped with a 17-inch spare tire and either an 18-inch or 20-inch accessory road tire may have a problem: using the spare with other 18-inch or 20-inch tires can prevent the Anti-Lock Braking System (ABS) from engaging.
Seat Belts May Not Be Securely Attached, Raising Crash Injury Risk
Incorrect bolts may have been used at one or more points where the seat belts attach to the vehicle.
Front Center Seat Belt May Not Restrain Occupant in Crash
Some full-size Chevrolet Silverado and GMC Sierra pickups from the 2019 to 2020 model years have a problem with the seat belt brackets for the front center seat.
Most common 2021 GMC Sierra 2500 problems
Problem areas named in the 52 complaints owners filed with NHTSA.
| Problem area | Reports |
|---|---|
| Power Train | 13 |
| Exterior Lighting | 9 |
| Engine | 8 |
| Service Brakes | 6 |
| Electrical System | 6 |
| Structure | 5 |
| Latches/Locks/Linkages | 4 |
| Forward Collision Avoidance | 3 |
| Unknown Or Other | 3 |
| Air Bags | 2 |
What owners report
The contact owns a 2021 GMC Sierra 2500. The contact stated that while driving at an undisclosed speed, the transmission unexpectedly shifted out of first gear and the vehicle failed to accelerate as needed. The failure had occurred twice. The vehicle was towed to the dealer, who determined that the valve body needed to be replaced. The failure mileage was approximately 38,000.
The left rear internal "top-hat" parking brake shoes suffered a total manufacturing bonding failure, causing the friction lining to completely delaminate and detach from the metal backing plates inside the rotor hub. This triggered Diagnostic Trouble Code (DTC) C060B (Left Park Brake Actuator Circuit). The failed components were replaced by the servicing facility and are unavailable, but the official dealer diagnostic scan sheet and itemized repair invoice are preserved and available for inspection upon request. Safety was compromised in two ways. First, the mechanical failure completely disabled the electronic parking brake system, forcing a heavy-duty truck to rely exclusively on the tran
After finishing a long drive south, I shut the engine off and a yellow engine code popped on. I connected my computer to it and revealed a P129F code (fuel pump control module). I have noticed that other GMC models have been included in a recall concerning this problem. The 2021 GMC 2500 Denali should be also since it is the same problem. This needs to be covered by the manufacturer since it is a constant problem.
I am reporting repeated failures involving both the transmission and diesel emissions (DEF) system on my 2021 GMC Sierra 2500HD Denali equipped with the 6.6L Duramax diesel engine and Allison 10-speed automatic transmission. While under warranty, the truck required replacement of the aftertreatment fuel injector and later the Reductant Control Module due to DEF/emissions system failures. General Motors also completed recall-related transmission software updates on the vehicle. At approximately 154,833 miles, the transmission began shifting improperly, set transmission fault codes, and required complete replacement at my expense. Less than 5,000 miles later, the vehicle again experienced a
We keep getting an error message that shows we need to service DEF SYSTEM, it also started to limit my MPH and is now locked at 55 MPH. initial check of the DEF SYSTEM shows a malfunctioning module. it has been happening over the last year to 18 months. they would reset it or it would sometimes go away on its own after having to drive it in order for the error to clear.
2021 GMC Sierra 2500 questions
Does the 2021 GMC Sierra 2500 have any recalls?
Yes. NHTSA lists 6 safety recalls for the 2021 GMC Sierra 2500: Rear Wheels Can Lock Up, Raising Crash Risk; Tailgate May Unlatch While Parked, Risking Open Tailgate on the Road; Water Can Short Brake Module and Cause Fire Risk; Spare tire can disable anti-lock brakes, raising crash risk; Seat Belts May Not Be Securely Attached, Raising Crash Injury Risk. Recall repairs are normally free at an authorized dealer.
What are the most common problems with the 2021 GMC Sierra 2500?
Based on 52 owner complaints filed with NHTSA, the most-reported problem areas are Power Train (13), Exterior Lighting (9), Engine (8).
How do I check if a recall on my 2021 GMC Sierra 2500 has been fixed?
Enter your 17-character VIN in our VIN recall check. It shows open recalls that have not been repaired on your specific vehicle. Recall repairs are normally free at an authorized dealer.