Fectory xm should be easy to use. I dont beleive that there is an oem lead for gps outside the onstar module and it is not easy to get it out of that box although it can be done. If they did the install properly, the new gps antenna would be mounted under the dash and you would not even notice it.
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\'05 Slate Blue Sut w/ Magnusun, JBA headers, custom exhaust, 22\" MC2 RT5 wheels, Pioneer AVIC Z1 nav, Passport SRX, Vizualogic A1000 dual, bi xenons, fog xenons, dual optimas, and just gettin\' started!
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