Did you know?Chevy Avalanche was launched in 2001 as a 2002 model on the GMT800 platform.
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Well my main concern is that in my reading I've seen requirements for an extra harness to make On*, XM and the door chimes all work. Those extra harnesses cost up to $150 each! So in addition to forking out the $1000+ on the unit itself, the extra harnesses and add-ons add another $350 easy. Of course, that's IF I can find a stereo that fits. Some sites I have seen (Crutchfield, Best Buy) say that not all double din stereo's will fit in the 07. I would really be upset if I purchased the unit online only to find out that it didn't fit.