The only thing that the dealer can do on them radio is to enter the VIN # in and that should work and after that you should be able to call the XM radio people and activate the system
if still not working and
if no codes and GM help line was unable to help your dealer to activate and get you back on the road happy the system at fault and the radio is not comparable with what you have
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Wednesday, February 3rd, 2010 AT 10:30 PM