Our 2017 Bolt has been parked in an unsealed garage for almost three years with no rodent issues.
BTW, I know there are mice in the area because they were eating the peas in the adjacent garden. I set traps and caught a dozen of them.
2017 Bolt Premier Cajun Red
2011 Saab 9-4X
2005 Saab 9-5
1998 Saab 9000 Aero
2004 Ford F250 6.0 Turbo Diesel
1963 Studebaker Avanti
1956 Studebaker Hawk custom with a supercharged Packard V8
1955 Studebaker custom pickup with a Packard V8