Safety Score
70
Average
Recalls
0
Complaints
50
NCAP Stars
—
Recalls (0)
No recalls found for the 2021 GMC Sierra 1500.
Owner Complaints (showing up to 50)
| Date | Component | Crash | Injuries | Summary |
|---|---|---|---|---|
| 2026-03-31 | ENGINE | No | 0 | THE ENGINE COMPLETELY SHUTS OFF WHEN I STOP AT A STOP SIGN OR STOP LIGHT. I HAVE BEEN STUCK IN TRAFFIC INTERSECTIONS ON… |
| 2026-03-31 | ENGINE | No | 0 | There is a recall on the 6.2 motor that is in my truck at my last oil change they performed a pico scoop diagnostic on … |
| 2026-03-30 | UNKNOWN OR OTHER | No | 0 | P1098 code coolant control valve fail service bulletin N252508341 my vin not covered but same motor and same part ! |
| 2026-03-22 | TIRES | No | 0 | Tires are LT275/65R20. While driving on interstate at approximately the speed limit and low 80 degree temperatures in … |
| 2026-03-21 | ENGINE | No | 0 | -The engine in my 2021 GMC Denali 1500 with the 6.2L engine failed its second engine with ~4,000 miles on the new engin… |
| 2026-03-21 | ENGINE | No | 0 | L87 engine failure 4 months after it passed the recall test. Experienced shuddering and rpm fluctuation with the cruise… |
| 2026-03-20 | STEERING | No | 0 | Loss of steering, erratic steering control. Steering locks up |
| 2026-03-18 | ENGINE | No | 0 | I am filing a complaint regarding a catastrophic engine failure in my 2021 GMC Sierra 1500 equipped with the 6.2L V8 en… |
| 2026-03-17 | UNKNOWN OR OTHER | No | 0 | When my android auto does not connect, it essentially disables the whole infotainment system which is incredibly distra… |
| 2026-03-13 | ENGINE | No | 0 | Loss of power, and knocking from the engine while driving. Check brake system, check srs, check parking brake and chec… |
| 2026-03-08 | ENGINE | No | 0 | Took it to dealer for engine sound said nothing was wrong 4 days later rod bearing went out while driving. Truck no lo… |
| 2026-03-05 | ENGINE | No | 0 | Engine developed a low knock type noise just above idle while beginning to move in the parking lot. It was also noted p… |
| 2026-03-04 | POWER TRAIN | No | 0 | With the cruise set at 55-60 mph the Rpms will jump, along with a slight shudder feeling. Cruise control has turned off… |
| 2026-03-02 | POWER TRAIN | No | 0 | Per GMC dealership, this vehicle suffered a Transmission valve body failure and they are recommending replacement of th… |
| 2026-02-27 | ELECTRICAL SYSTEM | No | 0 | Rear tailgate on my 2021 Sierra opens or drops when wet. This seems to only happen in a heavy rain or after a truck was… |
| 2026-02-17 | ENGINE | No | 0 | 6.2 lifter failure at 44500 miles |
| 2026-02-16 | POWER TRAIN | No | 0 | My vehicles transmission is part of a recall but my vin is not registered for this recall repair. Please assist. |
| 2026-02-13 | ENGINE AND ENGINE COOLING | No | 0 | The contact owns a 2021 GMC Sierra 1500. The contact stated that while operating the vehicle, the check engine warning … |
| 2026-02-13 | POWER TRAIN | No | 0 | Transmission Shuttering which was confirmed from from GMC dealership , but refused to do any repairs after confirmation… |
| 2026-02-11 | ENGINE | No | 0 | Began with a misfire on cylinder 5 code P0305. Replaced spark plugs, wires, and coil pack. Misfire still existed. Fuel … |
| 2026-02-11 | POWER TRAIN | No | 0 | I have had shuddering on the highway and a few hard random diwnshifts. Last week I went to start my truck and the trans… |
| 2026-02-09 | ENGINE | No | 0 | I was driving on a highway on my way home from work. Thank god there was not a lot of traffic because my truck just shu… |
| 2026-02-09 | ENGINE | No | 0 | The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving approximately 45 MPH, the transmission i… |
| 2026-02-04 | POWER TRAIN | No | 0 | I've been to the dealership a few times due to the truck jerking violently under very light acceleration when its tryin… |
| 2026-02-04 | ENGINE | No | 0 | Loss of power code p0016 now truck won't start |
| 2026-02-02 | ENGINE | No | 0 | At 22,000 miles I experienced issues while driving on a 150 mile trip. We frequently take this particular drive. We ch… |
| 2026-01-29 | ENGINE AND ENGINE COOLING | No | 0 | The contact owns a 2021 GMC Sierra 1500. The contact stated while driving 65 MPH, the vehicle was shaking abnormally wi… |
| 2026-01-24 | POWER TRAIN | No | 0 | The DEF tank in my truck is defective and its the second time in the last 14 months it has broke. The part is now back … |
| 2026-01-20 | POWER TRAIN | No | 0 | On the afternoon of 01/20/26, I was merging onto the highway in my 2021 GMC Sierra 1500 when a loud bang was heard from… |
| 2026-01-20 | POWER TRAIN | No | 0 | 4 months after bring my truck back to the dealership for a body valve issue on the 10 speed transmission. The truck wen… |
| 2026-01-20 | ENGINE | No | 0 | The engine has a knocking sound. I took it into the dealer and they replaced the exhaust system thinking that was the p… |
| 2026-01-19 | ENGINE | No | 0 | Had a P1098 code. The truck was diagnosed by a certified technician. Found to have a failing coolant control valve. … |
| 2026-01-18 | ENGINE AND ENGINE COOLING | No | 0 | See attached document for complaint. INFORMATION, DETAILS, COMMENTS, DATES, AND NUMBERS ON RECALL 20211500 DENALI Reca… |
| 2026-01-15 | ENGINE | No | 0 | For the second time since I have owned the vehicle that was purchased brand new. The engine seized during driving on th… |
| 2026-01-13 | POWER TRAIN | No | 0 | 1-At approximately 40,000 miles, my transmission was replaced under warranty. It had been failing since approximately 2… |
| 2026-01-03 | POWER TRAIN | No | 0 | Driving down the road and engine shut off and would not start back. Had it towed to dealer and it needed a motor replac… |
| 2026-01-02 | STEERING | No | 0 | The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving 5 MPH, the vehicle lost proper steering … |
| 2026-01-01 | POWER TRAIN | No | 0 | I believe the torque converter is failing. While driving approximately 38 mph and also 48 mph up to 51 mph the vehicle … |
| 2025-12-26 | ENGINE | No | 0 | There is an active recall for the 6.2 L engines, which is what I have and it’s an issue with burning oil and catastroph… |
| 2025-12-24 | ENGINE | No | 0 | The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving approximately 50-65 MPH on an incline, t… |
| 2025-12-23 | ENGINE | No | 0 | Complete engine power loss. |
| 2025-12-15 | STEERING | No | 0 | The power steering on the truck would quit working at times. I made an appointment with a local dealership to have it c… |
| 2025-12-15 | ELECTRICAL SYSTEM | No | 0 | The Intermediate speed sensor 2 and internal transmission harness failed. The repair was to replace the internal trans… |
| 2025-12-13 | POWER TRAIN | No | 0 | Transmission valvebody failure, causing rapid, repeated rear wheel lock ups. Videos can be provided. These happen almos… |
| 2025-12-08 | POWER TRAIN | No | 0 | The valve body failed, brought it in to a GMC dealership 3 months ago they told me the valve body is on back order. Las… |
| 2025-12-08 | ENGINE | No | 0 | mechanical and electrical issues with my GMC Sierra Elevation Duramax Diesel, purchased in 2021. Despite multiple deale… |
| 2025-12-06 | ENGINE | No | 0 | Engine failure without any warning. Car maintenance was kept up-to-date. |
| 2025-12-02 | ENGINE | No | 0 | The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the engine seiz… |
| 2025-12-01 | POWER TRAIN | No | 0 | Vehicle began to slip or shift hard when putting it in gear or coming to a stop. The next morning the vehicle would not… |
| 2025-11-29 | ENGINE | No | 0 | Had a "Trans Hot Warning" light. Dealership said it was internal valve body failure. They said there is recall on thi… |