Safety Score
91
Safe
Recalls
0
Complaints
45
NCAP Stars
—
Recalls (0)
No recalls found for the 2021 GMC Sierra 2500.
Owner Complaints (showing up to 50)
| Date | Component | Crash | Injuries | Summary |
|---|---|---|---|---|
| 2026-03-05 | POWER TRAIN | No | 0 | While driving on the highway at normal speed, my vehicle was operating completely normally with no warning lights, mess… |
| 2026-01-26 | ENGINE | No | 0 | 80,000 Miles, complete engine break down. 12,000 to repair |
| 2025-11-30 | POWER TRAIN | No | 0 | Pulling into a driveway and the truck made a loud clunk and the check engine light, traction control light, and a reduc… |
| 2025-10-08 | POWER TRAIN | Yes | 1 | The contact owns a 2021 GMC Sierra 2500. The contact stated that while driving at 50 MPH, the contact was pulling a tra… |
| 2025-10-06 | SERVICE BRAKES | No | 0 | 2021 GMC Sierra 2500HD 6.6L gas 6 speed automatic transmission W/4wd After a brake service job the vehicle will random… |
| 2025-10-01 | EXTERIOR LIGHTING | No | 0 | My right headlamp/ turn signal assembly began flashing at random intervals. The high beam would come on and off randoml… |
| 2025-07-26 | LATCHES/LOCKS/LINKAGES | No | 0 | The contact owns a 2021 GMC Sierra 2500. The contact received Manufacturer's Recall Number: N232426400, for water intru… |
| 2025-04-02 | LATCHES/LOCKS/LINKAGES | No | 0 | The contact owns a 2021 GMC Sierra 2500. The contact stated that the VIN was included in NHTSA Campaign Number: 24V0600… |
| 2025-03-15 | POWER TRAIN | No | 0 | Radiator hose connection broke and loose fluid and transmission got broken |
| 2025-03-01 | SERVICE BRAKES | No | 0 | Parking brake locking up. There is recall on the brake module for my year make and model but my vehicle isn't on the li… |
| 2025-02-12 | EXTERIOR LIGHTING | No | 0 | Headlight vent failed. Hid control board filled up with moisture. Headlight is flashing like emergency vehicle if it tu… |
| 2025-02-03 | POWER TRAIN | No | 0 | Hard shifting. Back wheels locking up |
| 2025-01-30 | EXTERIOR LIGHTING | No | 0 | Known issue and has been attributed to a manufacturing defct, but no recall- Leaking headlight caused damage to headli… |
| 2025-01-16 | ELECTRICAL SYSTEM | Yes | 0 | When I’m in reverse the up the cameras turn off. On one incident I was backing up and the camera turned off causing me … |
| 2024-12-20 | EXTERIOR LIGHTING | No | 0 | The front left headlamp assembly low beam light unexpectedly began to flicker repetitively until the vehicle was turned… |
| 2024-11-28 | POWER TRAIN | No | 0 | The contact owns a 2021 GMC Sierra 2500. The contact stated while driving 40-55 MPH, the vehicle started losing motive … |
| 2024-11-21 | ELECTRICAL SYSTEM | No | 0 | On 11/21/24 noticed passenger headlight day light running light flickering. On 11/22/24 right turn indicator intermitte… |
| 2024-11-09 | SERVICE BRAKES | No | 0 | Seems to be a known problem according to a google search but brake fluid leaking from brake pedal onto drivers floor ma… |
| 2024-10-01 | LATCHES/LOCKS/LINKAGES | No | 0 | The contact owns a 2021 GMC Sierra 2500. The contact stated that no visible tailgate was attached, and the contact was … |
| 2024-08-13 | ELECTRICAL SYSTEM | No | 0 | Smog system check and Engan warning light keeps come on. |
| 2024-08-12 | POWER TRAIN | No | 0 | While driving down the highway pulling a trailer the truck started to slow down rapidly. We were able to pull to the s… |
| 2024-07-22 | POWER TRAIN | No | 0 | The transmission started lurching and surging power while driving |
| 2024-07-19 | POWER TRAIN | No | 0 | The contact owns a 2021 GMC Sierra 2500. The contact stated while driving approximately 70 MPH, the vehicle lost motive… |
| 2024-04-01 | EXTERIOR LIGHTING | No | 0 | 3 year old truck. The left headlight enclosure gained water and caused the whole headlight system to have issues. Water… |
| 2024-03-20 | STRUCTURE:BODY | No | 0 | My tailgate unexpectedly open as I was driving down the road. (2021 GMC 2500 Denali Sierra) This was the second time th… |
| 2024-03-07 | ELECTRICAL SYSTEM | No | 0 | The harness that hooks to bumper plug for trailer lighting is not completely water tight. Allows water in and creates b… |
| 2024-02-14 | ENGINE | No | 0 | The contact owns a 2021 GMC Sierra 2500. The contact stated that the vehicle was equipped with an engine block heater t… |
| 2024-02-02 | ELECTRICAL SYSTEM | No | 0 | While driving the entire dash cluster (speed,rpm etc) turns off entirely, reloads as if truck is just starting with all… |
| 2024-01-28 | UNKNOWN OR OTHER | No | 0 | The tailgate latch is not waterproof, and opens on its own sometimes. this can allow things to fall out of your truck. |
| 2024-01-18 | EXTERIOR LIGHTING | No | 0 | Headlights and turn signals failed. Flickering of various lights (Daytime running lamp, low beam, high beam, turn sign… |
| 2024-01-11 | FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING | Yes | 0 | I purchased a 2021 GMC Denali 2500 in December 2023. A couple days after purchasing the vehicle I received a message o… |
| 2023-11-09 | PARKING BRAKE:DRIVELINE:HYDRAULIC:ACTUATOR | No | 0 | The contact owns a 2021 GMC Sierra 2500. The contact stated that on several occasions while in park(P) with the parking… |
| 2023-10-06 | EXTERIOR LIGHTING | No | 0 | Passenger headlight light fills up with moisture resulting in the HID module filling up with water and shorting out. Th… |
| 2023-09-01 | LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH | No | 0 | The contact owns a 2021 GMC Sierra 2500. The contact stated while driving approximately 25–35 MPH, the tailgate unlatch… |
| 2023-08-06 | EXTERIOR LIGHTING | No | 0 | The driver side headlamp stopped working, Condensate buildup may be a contributing factor. No accident and vehicle is… |
| 2023-06-10 | POWER TRAIN | No | 0 | The owns a 2021 GMC Sierra 2500. The contact stated while driving 70 MPH, the RPM revved up to 6,000 RPM. Additionally,… |
| 2023-01-01 | ENGINE | No | 0 | The contact owns a 2021 GMC Sierra 2500. The contact stated that while driving at 55 MPH, the vehicle stalled unexpecte… |
| 2022-08-02 | AIR BAGS | Yes | 0 | Hit in the driver side tire, air bags didn’t release. Truck then went up in flames. |
| 2022-07-01 | STRUCTURE:BODY | No | 0 | when driving down the rode the center hood scoop blew off 0 |
| 2022-04-26 | ENGINE | No | 0 | Diesel Exhaust Fluid tank, high pressure |
| 2022-04-23 | TIRES | No | 0 | LT245/75R17 I bought these tires on Walmart. com June 2021 and had Walmart install with road hazard and lifetime balanc… |
| 2022-04-05 | SERVICE BRAKES | No | 0 | The contact owns a 2021 GMC Sierra 2500. The contact stated while approaching a stop sign and depressing the brake peda… |
| 2022-02-23 | AIR BAGS | No | 0 | The “Service Safety Restraint” alarm goes off continually on my 2021 GMC Sierra 2500HD AT4. The warranty is no longer v… |
| 2021-11-24 | SERVICE BRAKES | No | 0 | Brake pads have excessive squealing. Squealing implies incorrect pressure to rotor to stop the vehicle, which highly co… |
| 2021-02-24 | ENGINE | No | 0 | THE TRUCK IS PARKED AT DEALERSHIP |