NHTSA Complaint #11668698 — 2021 CHEVROLET SILVERADO 1500

ENGINE issue reported to NHTSA

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Complaint Details

ODI Number	11668698
Vehicle	2021 CHEVROLET SILVERADO 1500
Component	ENGINE
Date of Incident	June 1, 2025
Date Filed	June 23, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	LA

Consumer Description

Failure of the coolant flow control valve and DEF component. Caused the engine to overheat and potentially fail while driving. The part to repair this problem has been very difficult to obtain causing a prolonged period of time in a repair shop. According to online forum information this an ongoing problem with this particular engine for over 4 years now. In my general area there are 6 vehicles that are in need of this particular part before they can be repaired. This is definitely not an isolated incident.

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