NHTSA Complaint #11685257 — 2021 GMC SIERRA 1500

ENGINE AND ENGINE COOLING issue reported to NHTSA

Check any vehicle history by VIN - Free vehicle history report

Complaint Details

ODI Number	11685257
Vehicle	2021 GMC SIERRA 1500
Component	ENGINE AND ENGINE COOLING
Date of Incident	July 2, 2025
Date Filed	September 5, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	CA

Consumer Description

See attached document for complaint. I am writing as the owner of a 2021 GMC Sierra 1500 equipped with the 6.2-liter engine that has recently been included in a significant recall. I've been advised that the engine may need to be replaced entirely. As you can imagine, this is extremely concerning given the scale of the defect and the vital role this truck plays i'n my dayto- day responsibilities.

Related Complaints for the 2021 GMC SIERRA 1500

Other ENGINE AND ENGINE COOLING Complaints

#11719314 — February 20, 2026 — The contact owns a 2021 GMC Sierra 1500. The contact stated that while operating the vehicle, the check engine warnin...

#11714339 — January 29, 2026 — The contact owns a 2021 GMC Sierra 1500. The contact stated while driving 65 MPH, the vehicle was shaking abnormally ...

#11703710 — December 8, 2025 — The contact owns a 2021 GMC Sierra 1500. The contact had received notification of NHTSA Campaign Number: 25V274000 (E...

#11699845 — November 17, 2025 — The contact owns a 2021 GMC Sierra 1500. The contact received the recall letter for NHTSA Campaign Number: 25V274000 ...

#11694696 — October 21, 2025 — The contact owns a 2021 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 25V27400 (Engine...

Recent Complaints for the 2021 GMC SIERRA 1500

#11719556 — BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING — February 21, 2026 — 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 s...

#11719556 — ENGINE — February 21, 2026 — 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 s...

#11719556 — POWER TRAIN — February 21, 2026 — 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 s...

#11718970 — ENGINE — February 18, 2026 — The failed component is the engine coolant control valve on a 3.0L Duramax truck. The failure has been documented and...

#11718623 — POWER TRAIN — February 17, 2026 — I have had shuddering on the highway and a few hard random diwnshifts. Last week I went to start my truck and the tra...