Josh nailed it! You do have to pull the headlight housing to change the bulbs. If you have a very long extension and a #10 metric socket with some tape stuck in the end you can take the housing out without pulling the grill.H11 for the low beams. Fogs are 9145. I don't have my truck yet but from what I read on here and in the owners manual you have to take the headlight assembly out to replace the mains. Fogs are simple.