I have a 2014 Chevy Silverado 1500 LT and recently started having an issue of the coolant temperature gage not registering a temp. This is accompanied by the cooling fan kicking on full blast even after engine and ignition shutdown. The fan will run for a few minutes which in turn killed the battery. (I realize I should have disconnected it). Based on my lack of knowledge it seems to be a coolant temp sensor. I have tried to do some reading and have found a few people with the same or very similar issues, but have not been able to find a fix. Hoping someone has actually figured this one out.