It affects cars made in 2006 and 2007:
1) 2006 Chevrolet Trailblazer EXT
2) 2006 GMC Envoy XL
3) 2006/2007 Chevrolet Trailblazer
4) 2006/2007 Buick Rainier
5) 2006/2007 Saab 97X
6) 2006/2007 Isuzu Ascender
GM says a fluid can get inside the driver's door module and lead to a short in the circuit board. It can also deactivate the power locks and windows.
So far, no one has been hurt.