coolant temperature

I purchased a 2000 Buick LeSabre Limited with 113,000 miles about 6 months ago and have loved it so far. Shortly after purchasing, I had the upper and lower intake gaskets replaced by a trusted mechanic along with the metal coolant elbows, water pump, and thermostat. In an effort to diagnose...

Alright everybody, I've got a weird one I've never seen before. Hopefully someone can shed some light on this. I have a 2017 LaCrosse 3.6 and about a month ago, the coolant temp guage started to intermittently drop all the way down and the fans kick on high. Now, normally I would think a...