OK, The back of the cab has a Plastic Vent in the Center a few inches below the rear window. I unbolted the Bed, Jacked it up a couple of inches then fed the video feed wire from the camera (I did wrap the wire with some chafe resistant tape) The Wire actually slid right in the vent. From there I went around the window and followed the cab Interior light wires and went to the mirror.
My 02 Silverado Extended Cab I did similar, Through the Vent(there are 2) under the carpet to the door jam plastic molding up to the drivers side foot well over to the center behind the dash and console to the video jack of the Stereo.
I over Thought it for a while, I am not a fan of drilling holes in my vehicles, but it was easier than I made it out to be.
I do regret getting a single din stereo in the s10 but... I am near Augusta, Ga. Evans. Moved here from Long Island, NY 17
years ago and I won't EVER go Back!!!
Scott