To read the original thread and discussion on this topic go here- LINK
photo one : dome light assembly hole with old wires
photo two : top of the fuel tank, behind the driver side of the cab, shows the white and orange/white wires running down the two clips back there. On my truck the wires ran down there, then under the door sill/plate thing with the chevy logo on it. From there it ran up past the bright lights on/off switch to the fuse panel where the plug snaps in.
photo three : bad dark rainy day photo showing the wires running by the dimmer switch
photo four : dark shot of the plug and the fuse panel.
My biggest aggravation with this project was getting the sill loose as all of the phillips heads stripped out on me. If your truck is beat up and rusty like mine, I would suggest working on getting that part loose before tackling the rest of the project.
-W