Sierra HD (4th)
Data covers 5 NHTSA model names
Reliability Score
Complaints by Engine Code
L5P
6.6L 8-cyl TurboView details
Complaint Breakdown
L8T - SIDI, VVT, CAST IRON
6.6L 8-cylView details
Complaint Breakdown
Show 3 additional engine variants with limited data
GMC Sierra HD Unidentified Engine
View details
Complaint Breakdown
L87
6.2L 8-cylView details
Complaint Breakdown
XRJ + ETN
View details
Complaint Breakdown
Owner Complaints by System
Complaints owners filed with NHTSA about the GMC Sierra HD, counted across every engine. A complaint can name more than one system.
What to check on a used 2020-2025 GMC Sierra HD
On a used 2020-2025 GMC Sierra HD, the systems with the most NHTSA owner complaints are the transmission and drivetrain (142), the electrical system (106) and the brakes (76). Each one has an inspection step below, with counts as of 2026-10-12. A complaint is an owner report, not a confirmed defect, and counts rise with sales.
- Accelerate gently through every gear, then once at full throttle. Shift into Reverse and back to Drive.Costly repair. NHTSA has 142 owner complaints on the 2020-2025 GMC Sierra HD about the transmission and drivetrain, all engines combined.
- Switch on every electrical item in turn: lights, windows, locks, wipers, climate fan, screen and power outlets.Costly repair. NHTSA has 106 owner complaints on the 2020-2025 GMC Sierra HD about the electrical system.
- On an empty road, brake firmly from 40 mph with a light grip on the wheel.Safety. NHTSA has 76 owner complaints on the 2020-2025 GMC Sierra HD about the brakes.
- Start the engine cold and listen for the first 30 seconds, then again at idle once it is warm.Costly repair. NHTSA has 66 owner complaints on the 2020-2025 GMC Sierra HD about the engine, all engines combined.
- Open and close every door, the hood and the trunk or hatch. Check the latches, the seals and the gaps between panels.Minor. NHTSA has 45 owner complaints on the 2020-2025 GMC Sierra HD about the body and structure.
Recalls (14)
General Motors, LLC (GM) is recalling certain 2024-2025 Chevrolet Silverado 2500 and GMC Sierra 2500 vehicles equipped with the enhanced towing option and 20-inch accessory tire/wheel package. The tire information label may state the incorrect rear tire pressure, resulting in underinflated tires and preventing the tire pressure monitoring system (TPMS) from displaying a low tire pressure warning.
General Motors, LLC is recalling certain 2020 Chevrolet Silverado 2500, 3500, GMC Sierra 2500, 3500, and 2020-2022 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles that may have been repaired incorrectly under recall 24V797. The transmission control valve may fail and cause the rear wheels to lock up.
General Motors, LLC (GM) is recalling certain 2024 Chevrolet Silverado HD 2500, 3500, and GMC Sierra HD 2500, 3500 vehicles equipped with power-unlatching tailgates. The tailgate's electronic gate-release switch may short circuit due to water intrusion, which can result in the tailgate inadvertently unlatching while the vehicle is in Park.
General Motors, LLC (GM) is recalling certain 2020-2022 Chevrolet Silverado 1500, 2500, 3500, GMC Sierra 1500, 2500, 3500, 2021 Cadillac Escalade, Escalade ESV, Chevrolet Tahoe, Suburban, GMC Yukon, and Yukon XL vehicles equipped with diesel engines. The transmission control valve may fail and cause the rear wheels to lock-up.
General Motors, LLC (GM) is recalling certain 2020-2024 Chevrolet Silverado 2500, 3500, GMC Sierra 2500 and 3500 vehicles equipped with power-unlatching tailgates. The tailgate's electronic gate-release switch may short circuit due to water intrusion, which can result in the tailgate inadvertently unlatching while the vehicle is in park.
Show 9 older recalls
General Motors, LLC (GM) is recalling certain 2024 Chevrolet Silverado 2500, 3500, and GMC Sierra 2500, 3500 vehicles. The steering gear shaft may fracture and disconnect from the steering arm.
General Motors, LLC (GM) is recalling certain 2021-2022 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500 vehicles with electronic brake control modules (EBCM) replaced during vehicle assembly. The bolts that attach the brake pressure modulator valve (BPMV) assembly may not be properly tightened, which could fail to seal the two sub-assemblies and allow water intrusion.
General Motors, LLC. (GM) is recalling certain 2020-2021 Chevrolet Silverado 2500 and GMC Sierra 2500 vehicles equipped with a 17" spare tire (RPO ZHQ or ZXT) and either the 20" accessory road tire (RPO REM) or the 18" accessory road tire (RPO Q2V). Operating the spare tire with other 20" or 18" tires can prevent the Anti-Lock Braking System (ABS) from engaging.
General Motors, LLC (GM) is recalling certain 2020 Chevrolet Bolt EV and 2021 GMC Canyon and Sierra 1500, 2500 and 3500, Yukon, Yukon XL, Cadillac Escalade and Escalade ESV and Chevrolet Blazer, Camaro, Colorado, Equinox, Silverado 1500, 2500 and 3500, Suburban and Tahoe vehicles. Incorrect bolts may have been used at one or more fastening locations to secure the seat belts to the vehicle. If an incorrect bolt was used, the seat belt may not be properly attached to the vehicle.
General Motors, LLC (GM) is recalling certain 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500, 2021 Chevrolet Suburban and Tahoe and GMC Yukon XL and 2020-2021 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The seat belt brackets may not be secured to the seat frame in the front-row center seating position.
General Motors, LLC. (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5 and XT6, Chevrolet Blazer, Silverado 1500, 2500 and 3500 and Traverse and GMC Acadia and Sierra 1500, 2500 and 3500 vehicles. The diffuser component of the Roof-Rail Air Bag (RRAB) inflator may not have been properly crimped to the inflator and could separate from the inflator during air bag deployment.
General Motors LLC (GM) is recalling certain 2020 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles previously recalled under 20V-142. Some of the vehicles in 20V-324 were not part of Recall 20V-142 but received defect parts during another service (typically during collision repair). The hood-latch striker wires on replacement hoods installed for Safety Recall 20V-142 may not have been heat-treated properly, possibly causing them to fracture.
General Motors LLC (GM) is recalling certain 2020 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The hood-latch striker wires may not have been heat-treated properly, possibly causing them to fracture.
General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500, and 2020 Silverado 2500, Silverado 3500, Sierra 2500, and Sierra 3500 vehicles equipped with carpet floor covering. When the front seat belt pretensioners deploy, hot gas may vent through an opening in the pretensioner bracket, possibly igniting the carpet.
All Generations
Alternatives in Heavy-Duty Truck
Frequently Asked Questions
What are the most common 2020-2025 GMC Sierra HD complaints?
Owners have filed 499 complaints with NHTSA about the 2020-2025 GMC Sierra HD. The systems they name most often are the transmission, the electrical system and the brakes.
Is the 2020-2025 GMC Sierra HD a good used car?
That depends on the model year, the mileage and the maintenance history of the car in front of you. Owners have filed 499 complaints with NHTSA about the 2020-2025 GMC Sierra HD. Check which systems they name most often and whether a recall is still open on that car.
How many NHTSA complaints does the 2020-2025 GMC Sierra HD have?
NHTSA has 499 owner complaints on file for the 2020-2025 GMC Sierra HD as of the latest data pull. A complaint is an owner's report, not a confirmed defect, and counts rise with sales.
What recalls affect the 2020-2025 GMC Sierra HD?
NHTSA lists 14 recalls covering some 2020-2025 GMC Sierra HD vehicles. Which ones apply depends on the VIN: enter it at nhtsa.gov/recalls to see the open campaigns on a specific car.
What should I check before buying a used GMC Sierra HD?
Run the VIN through NHTSA's recall lookup and confirm every open recall has been done. Look hardest at the transmission, the electrical system and the brakes, the systems owners complain about most. Ask for maintenance records, have an independent mechanic inspect the car and run a vehicle history report for prior accidents and title issues.
Does the Sierra HD have NHTSA crash test ratings?
NHTSA has not published crash test ratings for the 2020-2025 GMC Sierra HD. Not all vehicles are tested each year. For the latest NHTSA safety information, visit nhtsa.gov/ratings.
Data from NHTSA federal complaints database. 499 complaints analyzed. Data confidence: high. Last updated: 2026-10-12.