[Venom]

It was actually pretty easy. If you look at the headliner in the rear you will see 2 plstic caps towards the middle.

Pop these caps off and up inside you will see the nuts that hold the brake light assembly to the outside of the vehicle.
Take off the nuts and the brake light will lift off.

Put your Sirius antenna on the roof, its magnetic.
Then run the pigtail to the spot where the weather strip is located against the body of the truck.
There are 2 large holes to run the wire into the cab.

Now put your brake light back on and the weather strip will form around the antenna wire. Put the nuts back on.

Tuck the wire under the edge of the headliner all the way to either side and then run the wire under the panels wherever it needs to go.

It is a little tricky running it under the headliner. If you pull on the headliner to hard, then one of the clips will pop out. It is a ***** to get them back in. I popped 2 out and it took me 30 minutes to get them back in. The whole Sirus intall took 45 minutes including putting the clips back in.