[KenHorse]

We just got through 4+ days of sub-freezing temps (never got above 24 and went as low as 14) and, after things started thawing out, I noticed a small amount of what appears to be coolant (has the reddish tint to it) on the floor. As you see in the attached pics, it's not much and seems to have originated on the passenger side, about 1 foot in from the side skirts.

First thought (of course) is cracked block or split hose. So I started it up (fired right up) and brought it up to running temp with no further evidence of escaping fluid of any kind. I checked what I could without getting under the car and there's no sign of leakage that I can see. Also, the TPMS on that corner is reporting as low (21 psi) and a pressure gauge says 22.5 (close enough)

We've been through freezing temps before with this GS (2019 model) and I've never seen this until now.

Thoughts?