A former coworker of mine bought that Toyota thing that looks like a bug-out vehicle...and for that purpose.
I informed him that being a 2012 (or so) model year it won’t hold up to well against an EMP. He said “whoops”.
Faraday garage. Make the garage into a cage with rebar, like if it was going to all be a concrete shell. Will work better than a tinfoil hat.