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Recall 21V-496

General Motors, LLC recalled the 2017 to 2019 Chevrolet Silverado 2500 and 3 other models: Equipment (electrical, engine block heater).

At a glance

Campaign number
21V-496
Reported
July 1, 2021
Vehicles affected
338,020 estimated by the manufacturer

Source: NHTSA recall records

What is wrong

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.

The risk

An electrical short-circuit can increase the risk of a fire.

The fix

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-[removed]. GM's number for this recall is 212329840.

Notes from the manufacturer

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-[removed] (TTY 1-[removed]), or go to [link removed]

Affected vehicles