The problem, revealed in documents posted by federal safety regulators this week, is so serious that GM is telling customers to park the SUVs outdoors until they are repaired because they could catch fire when left unattended.
The vehicles will be left outside for a while.
Parts won't be ready until October at the earliest, according to GM.
The automaker also has ordered its dealers to stop selling the SUVs as used cars until they are fixed. The recall covers about 189,000 vehicles in North America, mainly from the 2006 and 2007 model years.
Models affected include the Chevrolet TrailBlazer, GMC Envoy, Buick Rainer, Isuzu Ascender and Saab 97-X. The recall was one of six announced by GM on June 30 that covered 7.6 million vehicles.
GM is in the midst of the biggest safety crisis in its history.
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