8mm or 5/16 socket
First I just want to say this was WAY easier than I expected it to be.
Ok first, if you haven't already done so, you need to remove the jumpseats, mine were already out, so if you don't know how to remove them, ask. That's even easier.
Next you need to remove the "C" panel trim. That's the trim with the seatbelt attached to it. Now you have two options you can
A. Remove the upper trim and the seatbelt,
B. Bend the lower trim plastic out from the upper trim and pull it out of the way.
I opted with B and just removed the lower trim leaving the upper in place.
Once this is completed on both sides next comes removing the back panel. There are no screws or anything attached to it, it's simply located the clips and give it a good tug.
This leaves the head rest bolts exposed. There are two per side.
Once you remove the second bolt hold on to the headrest because it will fall straight out of the ceiling. Accomplish this on both sides and you are done.
Well except for putting the truck back together, but it's all snaps just put the back wall on first and your home free.
Any questions ask.