SIR GM1

[BlueHUMMERH2]

I just put the unit in, with XM already there. I had a heck of a time trying to remove the connections from the factory XM module. I think, after forcing them off, the way to remove the main harness is to pull up on the blue piece on back and push in below on the back when it's pulled up. As for the orange factory XM antenna, push the ridged area in and it should allow you to then pull the factory XM antenna off.

I couldn't figure out where I wanted to place my SIRIUS module. Using the XM antenna, I didn't have much room to play with. So I managed to push it back into the void above the old XM module, somewhat under the dash. Suppose it will be ok there.

As for using the factory antenna, if you push out the white piece in the orange adaptor, and then break the two small pieces of plastic, the antenna will slide out. It is identical to the SIRIUS supplied antenna cord. So my assumption is that it will function correctly. There have been no problems so far, other than maybe the SIRIUS antenna has better reception.

I transferred my subscription from a dash mounted SIRIUS to the SIR-GM1, and I'm very happy with the difference in sound quality, and the loss of the wires everywhere in addition to always having to tune into an FM preset which always seems to collect interference or have to be changed will travelling. Or, sometimes you pick up other people's SIRIUS... haha. But now it's a clean set-up and there are no exposed wires, radio says SIR 1 and SIR 2, and everything seems to work. So I'm happy!