GM pickups recalled for the 2nd time due to engine block heater problem

GM is recalling more than 331,000 diesel pickup trucks in the U.S. for a second time due to concerns that the optional heater cord could develop a short circuit

The recall covers:

  • 2017 - 2019 Chevrolet Silverado

  • 2017-2019 GMC Sierra 2500 and 3500 pickups with 6.6-liter diesel engines and optional engine block heaters.

GM says in documents posted Thursday by U.S. safety regulators that shorts can develop in the heater cord or terminals that connect the cable to the block heater. Coolant can leak from the block heater and come in contact with the cable terminals, possibly causing a fire. The heaters are used to keep the block warm in extreme cold temperatures.

The recall follows a previous report of problems in early 2019 (NHTSA campaign 19V328, GM number N182206310). GM has since received an additional 122 related complaints and 24 reports of potential, related fires.

Dealers will disable the block heaters and cords. Owners are to get notification letters starting Aug. 16. Replacement block heaters and cords will be offered through a separate customer service campaign.