Are these the ones holding the steering support bolts or something else? I have removed a lot of bolts from these trucks and they are the only square ones I know of behind the dash? What year is the truck? If it is the support bolts that bolt will break 9 out of 10 times due to their location and the water that condenses there. The best thing on any of these trucks if you don't want them to break is super high quality penetrating oil like Aero-kroil or similar. Let them soak for a few days before you try them.
