Okay, so here we go. I started inside in scoping out what has to be removed to lower the headliner. I recommend before you start, remove the rear seat head rests! It'll help you later on to lower the headliner.
Up Front, you'll need to remove the sunvisors, upper console, and A-pillar grab handles:
On each side, the upper grab handles and the bolt holding the top of the panel between the doors.
On the rear, the rear dome light, and support pins
Now work the headliner down with as much patience as you can. It certainly won't fall down... you have to work it around all the trim, etc. It took me 20-25 mins to get it worked down and onto the reclined seats.
The only thing that held mine somewhat up is the wiring that passes up the driver's side A pillar and over to the overhead console and then back to the rear dome light:
Now you are ready to take the plunge and drill some holes! I fully assembled the rack and set it on the truck. Prior to the install, I examined an LE truck with a factory rack and knew where Nissan put it on.
I put some tape down and marked the holes in the plastic mounts of the rack.
I then slid the rack to the side and used the reinforcement bracket to make the exact center of each hole. Since the brackets are specific to Left and Right, I used the right bracket to mark the holes on the outside of the roof of the left side... if that makes sense:
Did my ol Suzi roof back a way's. Bit scary but a bit of a dog tho, so wasn't too worried.
I would seal it with Sikaflex. Soooo much better than all the rest. Motor body builders only use it. Well the ones I know anyhoo.