I purchased this to put in my wife's colorado, but found out it wouldn't work with it, my loss your gain, this thing is brand new. here's the list of compatible vehicles. It's a scosche AXIPGMLAN here's a link to features and specs.
http://www.scosche.com/scoschesearch...ring=axipgmlan
$110 shipped to your door. retail is $199

Fits:

2006 - 2007 Buick Lucerne

2007 Cadillac Escalade

2007 Cadillac EXT / ESV

2007 Chevrolet Avalanche

2006 - 2007 Chevrolet Impala

2006 - 2007 Chevrolet Monte Carlo

2007 Chevrolet Silverado (new design)

2007 Chevrolet Suburban

2007 Chevrolet Tahoe

2007 GMC Denali

2007 GMC Sierra (new design)

2007 GMC Yukon / XL