NHTSA recall 21V-496 (21V496000)
equipment recall reported July 1, 2021 - about 338,020 vehicles affected.
- NHTSA campaign number
- 21V496000
- Also written as
- 21V-496
- Manufacturer number
- N212329840
- Reported
- July 1, 2021
- Vehicles affected
- ~338,020
- Component
- equipment
What is being recalled
General Motors, LLC (GM) is recalling certain 2017-2019 Chevrolet Silverado 2500, 3500 and 2017-2019 GMC Sierra 2500 and 3500 vehicles equipped with a Duramax diesel 6.6 liter engine and an optional engine-block heater cord. An electrical short-circuit may occur in the engine-block heater cable or in the terminals that connect the heater cable to the block heater.
Why it is dangerous
An electrical short-circuit can increase the risk of a fire.
The fix (free at any franchised dealer)
Dealers will replace engine block heaters and heater cords. Vehicles that have this feature disabled as a remedy to the safety condition will be contacted and offered replacement block heaters and heater cords under a separate customer satisfaction program, free of charge. GM will provide free replacement block heaters and cords under a separate customer satisfaction campaign. For vehicles previously included in recall 19V-328, the heater cord will be replaced and rerouted, free of charge. Interim owner notifications were mailed on August 13, 2021. Owner notification letters are expected to be mailed on April 4, 2022. Customers may call GMC customer service at 1-800-462-8782. GM's number for this recall is 212329840.
Recall repairs are always free, regardless of vehicle age or where you bought the car. Quote the campaign number 21V-496 when calling a dealer.
Affected 4 models
Each year links to that car's full history: every recall, owner complaints and common problems.
Source: NHTSA recall campaign data (public domain), refreshed weekly. See also the latest recall campaigns.