outside temperature has inaccurate reading

What is your question?

the dealer said that this occurs -Treatment is to drive above 20 mph for at least 5 minutes- than unit will update- my question is: what is consider normal frequency? Exampe : once a week ,.once a month or what? Is this normal or is it what they say to not fix it.

What makes this problem better or worse?

happens whenever

How long has your 2017 Chevrolet Suburban had this problem?

Eight months