2007 Chevy Trailblazer change

2007 CHEVROLET TRAILBLAZER
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SAEED1995
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Air Conditioning problem
2007 Chevy Trailblazer 6 cyl Two Wheel Drive Automatic

i have chevy trailblazer LS i want to change Dash control unit a/c from manual to digetal unit as the one it LT SOME WHAT I HAVE TO DO? DO I HAVE TO CHANGE ONLY THE UNIT OR SOMETHING ELSE?
Jul 29, 2010 at 10:30 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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