I own a 2005 chevrolet 4x4 w/o xm. I want to add the xm satellite antenna and hookup. GM is wanting to charge me 437.00 to upgrade me. Is this unreasonable?

 

Welcome to the Forum. Try doing a search. There are several threads on this subject on how to do it yourself and save some $$$$$

 

You can either get a XM kit that uses a FM modulator to broadcast the signal over low frequency radio waves or buy an after market AM/FM, CD player with XM tuner built in. Otherwise you'll spend quite a bit on updateing the factory system for XM. You can get a radio, CD player with XM built in for $250. FM modualtor setup, like $50-$60 I think.