Actually, with a new kit, you get a whole new antenna (not just a lead to plug into the existing gm onstar/gps antenna) and a new harness that comes with a 'y' so that you can disconnect the 12 pin at the head and plug it into the new harness. Finish by plugging the new 12 pin off the y back into the head. Considering the cost of the oem setup, people always choose to go with the Terk gmdirect kit as it does the exact same thing and costs less.
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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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