I have an 07 GMC Sierra Ext Cab 1500. I tow this truck behind my motor home. I am putting on the towing stuff and I have two problems. First, I have to find the brake light switch and cut into the "cold" side of the switch. I can't find the switch...it is not like in the old days and it is above the brake pedal. Secondly, I have cut into the tail lights and there are so many wires going to them I'm not sure what wires to cut. Does anyone have a wiring diagram of this truck or could tell me what what wires to cut and splice into?? Thanks...
Dennis...
Dennis...