The mice are coming in from under the windshield cowl. Take your windshield wipers arms off and remove the plastic cowl under the wipers. There are a few plastic clips and disconnect washer hose and radio antenna. Once that is removed on the passenger side there will be a plastic access panel that is siliconed on. Remove that also. There is no protection to keep rodents out of cabin air filter. Once you are in there u will see what I am talking about. I had a nest in my filter twice. Today I made a screen out of galvanized metal today and used aluminum hvac tape to secure it. I should keep them out now. I know it sucks to have to do this to a new truck but it is poorly designed with no protection. Hope this helps