Great post, I have only one problem with it. My truck is the 2007 Sieera GMT800. Can I do the same thing with my truck? I am trying to install an XM radio to the RAP circuitry. I've had my dash apart no less than 3 times looking for a place to tap into. I am currently using an accessory power connection, so when I turn off the key I lose power to th eXM radio and get a lot of static. Any help would be appreciated.
I read other post suggesting I use the sun roof power (no luck finding this), or tapping into the radio amp (haven't looked for that one yet).
Thanks, Mike