So I just sold my 2004.5 2500 and just ordered a 2018 Tungsten Limited 2500 Mega cab. I have been reading about the DEF systems and how it says it has a shelf life and don't store it in the back of your truck during the summer in Florida. But what I can't find and that is not to say it is not in here somewhere but my job has me traveling for 2 months and sometimes longer at a time.

Is there something that I need to do like drain my DEF out while I am gone and refill with fresh DEF when I get home?
Because the florida summers and humidity is not for the weak.

Thank you for any help

Mr.Blue