We also have 2018 so that is probably it. Also took us awhile to find the on off for antenna booster switch. it was in the bedroom closet. now we get to see if it will work on our trip this week.
Remember you'll have to scan the channels from the tv settings menu every time you move or switch from cable/antenna each time.
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Danny & Linda
Full-timed 10+ years
Former '13 FB owner
Traded '13 GMC Denali DRW D/A
Currently rv & truckless
Replacement undetermined