I would check with your dealer to see if it is a option or if they have done it in the past. Don't want to run a screw into a wire and you would have to catch a stud for support. Yes you could do it just be sure before you drill and make sure the holes are sealed good - don't want a leak!
Happy Fall Camping!
__________________
2009 Seville VF32KS
2019 GMC Sierra 3500HD Crew Cab Denali.
6.6 Diesel standard box.