So over the weekend I narrowed down an electrical draw to the "Radio" circuit. It's causing a 2.5A electrical draw when the vehicle is parked and off. It's a 2003 Tahoe (I know, it's not a Silverado or Sierra, but it's still GM and this forum is a lot more active than any other GM forums I've been on, so please don't flame me). Does anyone know if there were any common issues with the Bose systems back then that I could look at as being the culprit? I did a Google search for wiring diagrams and I came up with http://www.revbase.com/BBBMotor/Wd but unfortunately the diagrams it pulls up aren't labeled for which radio system each diagram is for, so I'm kindof lost on that one. Any help or advice would be greatly appreciated. Thanks everyone!