Hey thanks for the help AZSCTACO, if I were to have hooked this up in my truck last night (I apologize to everyone, its not actually a Chevy, but no one else had anything about this head unit), it went perfectly. For anyone that might want to have it where you could switch it to normal e-brake operating mode in addition to the bypass you just use a "center off toggle" ($4 at radio shack) and run the green wire to the center tab, a straight ground to one of the side tabs, and then a wire from the remaining tab to the e-brake wire (before the e-brake, not the ground). I was kinda new at this stuff so hopefully anyone in my boat can use this.

 

AZ - did ur tahoe come with the factory XM?

 

Yep.......I like sirius a lot better so i put that in.