Originally Posted by Tim'* 05 GXP
Just the XM
I'll figure out how much this will be and PM you. It may take a day or two because the next couple are going to be crazy busy with work.
I just re-read one of your messages. Just to clarify, were you considering the navigation radio or did you want to stick with the one you have? Right now on eBay these are going for roughly $400 - $600. If you wanted to install one of these, you would also require an additional antenna (the navigation radio has one of its own that mounts under the dash pad), an additional wiring harness to interface the navigation radio with the Bonneville connector, a navigation DVD and a couple of adapters for the AM/FM antenna. You will also need to muster lots of patience because there'* very little room to work in the dash.
The navigation head units are kind of neat because as long as you get an OEM version it knows what type of vehicle you drive. It will read the VIN from the class 2 data bus. This is how it knows whether to show a Cadillac, Chevy or in this case Pontiac splash screen, etc. There is an "aftermarket" version that was released by Delphi. These also work (this is what was in my original post). The difference is the symbols for volume and tuning are different, the word "Delphi" is printed above the CD/DVD slot and the splash screen will never say anything but "DELPHI". Otherwise, they seem to be functionally identical.