what have your daily outside temps been like?The latest update. My 2017 acadia started getting the power assist message and temperature gauge drop everyday. So when i get home i would keep taking off the negative battery terminal and retighten it. Clear the fault and drive again. I finally realized that i was tightening it down to tight and put a groove in the battery terminal. So as i was driving the negative terminal would loosen just a bit and the message would pop up. The last time after a week of dealing everyday with it i installed the negative terminal in a different spot off of the groove and torqued it down to correct value. Now for the last month or so i haven't had any more issues. Makes me think it was the terminal the whole time after dealing with it everyday. It was always tight enough to start and run the other systems but still loose enough to throw up the message and shut down the air conditioning.