General Motors LLC (GM) is recalling certain model year 2006-2009 Buick LaCrosse, 2006-2007 Buick Rainier, Chevrolet Trailblazer, GMC Envoy, 2006 Chevrolet Trailblazer EXT, GMC Envoy XL, 2006-2008 Isuzu Ascender, and Saab 9-7x vehicles. In the affected vehicles the headlamp driver module (HDM) may overheat and fail, causing the headlamps and daytime running lights to then fail and not illuminate.
Headlamps that do not illuminate reduce the driver's ability to see the roadway and reduce the vehicle's visibility to oncoming vehicles, both of which increase the risk of a vehicle crash.
The remedy for this recall is to replace the HDM free of charge. An interim notice was mailed to owners during January 2015. A second notice will be mailed when parts become available. Owners may contact GM customer service at 1-800-521-7300 (Buick), 1-800-222-1020 (Chevrolet), 1-800-462-8782 (GMC), 1-800-955-9007 (Saab). GM's number for this recall is 14291.