I installed the oem on my truck. There are three holes in the roof for each light. One large one for the electrical connection, and two smaller holes. The lights have studs on them and receive nuts from the inside. Hope that helps. Bryan
Budro is correct. You will have to remove the headliner to remove the lights. Take off the grab handle in the ceiling of the passangers side, the seatbelt shoulder harness high anchor and the rest of the trim will snap off with the exception of the rear light (dome). Remove its mounting screws. Reverse the order to install. Two people really helps.
I only removed the visors, and a piller covers, then was able to gently pull down enough to do what I wanted. There was a small crease created by doing this but it went away by itself overnight.
Budro, did you drill pilot holes from the outside first, or are there some type of pattern or knockouts on the backside of the roof sheet metal? And what circuit did you tap into? I'm interested in doing the light mod, I just don't want to reinvent the wheel, and I'm nervous about taking a drill to a $45K truck. Thanks.
I took some measurements off a new truck late one night when nobody was at the stealership.
I then placed enough blue masking tape over the cab to make plenty of measurement markings. I measured 6 times and drilled once.
I too was very nervous about drilling 15 holes in the roof of a truck that cost this much. Yours is almost twice what I payed in 2000. I drilled all holes from the outside.
I bought all parts needed for the install from stealership for around $62. I got the factory wiring harness too. On my truck the wires were already behind the glovebox in the passenger side kick panel area.
For my XM antenna...I took off the 3rd brake light thats mounted up high on the rear of the cab. I could then take a metal clothes hanger...unwound straight...and feed it through a hole up there...across the headliner and over toward the rear passenger door. From there...it was just removing the weather stripping on the door frame to wind the antenna wire to the dash. My antenna is mounted about 8 inches forward of the rear of the cab. I notched a small hole in the 3rd brake light plastic and filled in with a little black silicon. Haven't had any issues yet.
If my poorly worded description is exactly that...lemme know. I can go get some pictures taken for you.