NHTSA Complaint #11719314 — 2021 GMC SIERRA 1500

ENGINE AND ENGINE COOLING issue reported to NHTSA

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Complaint Details

ODI Number	11719314
Vehicle	2021 GMC SIERRA 1500
Component	ENGINE AND ENGINE COOLING
Date of Incident	February 13, 2026
Date Filed	February 20, 2026
Mileage	119,000 miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	TX

Consumer Description

The contact owns a 2021 GMC Sierra 1500. The contact stated that while operating the vehicle, the check engine warning light illuminated and remained illuminated. While driving at various speeds, the vehicle entered LIMP Mode, causing the vehicle to decelerate. Additionally, the radiator fan was continually activated while operating the vehicle. The vehicle was taken to the local dealer, who diagnosed that the coolant control valve was inoperative and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 119,000.

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