General Motors' redesigned 2014 full-size pickup trucks have only been on the market for a few months, but now they're being called back to the dealer to fix a potential flaw.
Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy.
The trucks are only supposed to use two cylinders when idling, but a software glitch is causing them to idle with most of their cylinders. This can cause exhaust components to overheat, and hence potentially catch fire.
The problem is signaled by a "check engine" light on the dashboard and an "engine power reduced" message in the driver information center.
GM has recorded eight fires related to the software malfunction, three on customer-owned vehicles.
All of the incidents occurred in cold-weather climates and were reported in December and January.
GM believes the problem was detected in part because vehicles are being left to idle longer than usual due to cold weather.
No one was injured in any of the incidents, four of which occurred while the trucks were still at dealerships, the company said.
Recall letters will be mailed Thursday, but truck owners can contact their dealers beginning Monday to set up appointments. Dealers will install a software update, which should take about 20 minutes.
In the meantime, GM is advising owners not to leave their vehicles idling unattended.