so i just got XM in my truck, and when im working in the garage or outside i just usually back my truck up, open the door and listen to it, but i cannot stand the door chime. in my s10 i used to be able to just pull the key out of the ignition with the truck on or in the acc+ position... cant do that with mine. its an '01 2500HD. anyone know where its at? how to disable it? or a little trick like the headlight trick?