The vehicles involved are the Chevrolet Trailblazer, GMC Envoy, Buick Rainier, Saab 9-7x and Isuzu Ascender from the 2006 and 2007 model years. The 2006 Chevrolet Trailblazer EXT and GMC Envoy XL are also included.
GM says owners should park the vehicles outside until they're repaired.
GM says the defect is caused when water gets into the driver's side door and corrodes a circuit board. If it shorts out, the power door and window switches may stop working. It could also cause overheating, which can lead to smoke or fire.
GM is notifying owners. Dealers will repair the vehicles for free.