This topic comes up every year at this time...some remove them for fear of theft but I think more damage can be done taking tv's in and out every year. I used to remove ours...I haven't the last few years. As others say...just don't turn them on in the cold.
P.S. Where I live we get sub zero temps for weeks on end, hasn't affected the tv's at all.
2016 Chevy Silverado 2500 Duramax
2016 Rockwood 8289WS, Diamond Pkg.