599-211XD Climate Control Module with Automatic A/C Configuration Compatible with Chevrolet Silverado, GMC Sierra, Tahoe, Trailblazer (2003-2009 Models) OE Replacement HVAC Unit
Easy installation - this climate control module features unique software that automatically configures the unit to the vehicle as soon as you plug it in, requiring no manual setup
Precise Compatibility - Direct fit for 2003-2009 Chevrolet, GMC, Buick, and Hummer models
Restores functionality - unit restores primary operations of original equipment (control functions on some models may vary from original)
Seamless fit - unit is identical in appearance to the factory module, retaining original look and feel