Something weird this morning. Went to drive the truck to work and got a Low Coolant message. Went back to the house to top it off, overflow was completely empty until I popped the cap off. Released a little bit of air pressure and the level came back up, no big deal, except the coolant that I could see looked milky, and the low coolant message wouldn't go away (will the sensor float in oil?). I am wondering if I have oil or trans fluid in the coolant. Looking at the sight tube, the milky stuff is only about 1/2-3/4" deep, then it looks like clean Dex underneath. The milky color looks light orange, not brown. I'll have to get a picture later, was in a hurry to get to work so I just parked it and hopped in the LML.
I did check the hoses for S&G yesterday after the truck sat for a couple hours and they were soft, so I'm confident that it's not a HG issue.