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Chevrolet electrical short-circuit may occur in the engine-block heater cable or in the terminals that connect the heater cable to the block heater.

NHTSA campaign 21V-496 · Reported July 1, 2021 · 338,020 vehicles affected

AFFECTED MODELS
Chevrolet Silverado and Sierra
VEHICLES AFFECTED
338,020
REMEDY
Dealers will replace engine block heaters and heater cords.
COST
Free

The short version

General Motors, LLC reported a problem with the electrical engine block heater. Here is what owners need to know.

WHAT

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 MATTERS

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

WHAT TO DO

Take it to a dealer — they will replace engine block heaters and heater cords, free of charge.

Affected vehicles

These model years are included in NHTSA campaign 21V-496.

YEAR RANGEMODEL
2017–2019Chevrolet Silverado
2017–2019GMC Sierra

What changed

Newest first. The record shows both when the recall began and what has changed since.

  1. Recall reported to NHTSA. LATEST

Drive one of these? Check your VIN to see if your specific vehicle is affected.

Check your VIN

What this record means

Data from the NHTSA recall database. A clean VIN check means no open federal recalls for that vehicle — not that it never had one.

Not affiliated

MyAutoRecalls is not affiliated with General Motors, LLC or the National Highway Traffic Safety Administration.