on my 08, dome light came off super easy, and the primary NMO went above it without issues.
for an antenna with less of a ground plane requirement, pulling the third brake light and installing one right there was even easier. There were holes for cable entry from the void space to above the headliner. Dont run it thru the same hole as the lights, run it on the opposite side.
the 11 probably has more airbags then my 08 did, but if you need the coax to the front of the truck, on the center of the roof where you pulled the dome light, start at the dome light hole on the inside, push something rigid straight horizontally, remove the weather strip to visualize the gap, and it should come out rearward of the roof mounted door latch.
Drill and install the NMO and orient the bottom of the NMO at a 45 degree angle pointed at the A post that you're going to run the coax down. Once the NMO is installed and tightened, use whatever rigid tool you used to pull the coax between the headliner and roof skin to that same point rearward of the latch, then get it forward of that by working it around the back of that latch, and once its forward of it, work it so that the cable runs at a 45 degree angle directly from the mount to the top of the A post. Detatch the A post trim (left side is easier since there isnt a grab handle, at least there wasnt in mine). Coax down adjacent to whatever harness is in there, you may find a cable tray type assembly, zip tie it to the harness which will keep it away from any airbag, and at the bottom of the A post its a straight shot down the back of the dash by the pedals.
If the radio body is in the rear, then coax back to the C post is super easy and just needs rubber trim to be removed. If the radio is under the front seats, i'd run it rearward down the C post, and under the door trim.
My 08 had a cluster**** of equipment.
Main radio body was under the driver seat (center NMO to driver side C post and down),
cell booster was under the passenger seat (nmo was centerline right side, down the passenger side C post),
Scanner was under the dash (nmo rear center by the third brake light, to passenger side A post down behind the glove box)
Ham radio was under the scanner (nmo rear left side to driver side A post behind the dash... not in the picture)
CB radio was a hump mount (fender mounted NMO in thru the firewall by the pedals)
Cell hotspot was mounted to the roof console (nmo was centerline left with an extremely short cable run direct to it)
XM radio antenna was mounted to the camper shell on the left side.
Dont get me started on the stupid spotlight.
