Thanks for the reply I have a crew cab long bed (2006)
Two up front behind the core support. They will be 18mm nuts. You'll need a deep wall socket.
Two under the dash. Pull back the carpet on each side and you'll see a black rubber piece. Pull it out and the bolts are in there. One side is 21mm other is 24mm. Might require a 3-6" extension.
Remove the rear seat and the metal tray under the seat. Also the plastic tray behind the seat. The bolts holding it down have a tendency to spin the little nuts pressed into the sheet metal of the cab so be careful with them. Pull back the carpet and the rearmost bolts are easily seen. All 21mm bolts should be on the same side as should the 24mm.
The middle bolts are under the carpet pretty much where the rear seated passengers feet would sit. They will also have the black rubber piece covering the bolt. Remove it and there are the bolts.
Nows a great time to get the vacuum out and clean up the carpet if you don't usually do that. Removing the front seats is quite simple as well if you want to vacuum up there too.
It might help to remove the plastic door sills when putting the carpet back in place.
Cab bolt torque spec is like 75ft lb. I typically just use a 1/2" impact and run them out and back in. Bolts aren't supposed to be reused per Ford but I've never actually replaced any and never had a problem.
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