I topped off the resevoir and let the wife run several (like 6) near-by errands all day yesterday - about 25 miles worth.
Then, the truck sat all night.
Then, I ran it for at least 25 minutes this morning.
...And not one drop has hit the drip pan, nor can I see ANY leakage from top or bottom of engine. Resevoir still full, where it was at yesterday's top-off.
I am confounded.
The wife did casually mention that someone pulled out right in front of her and she had to "emergency" stop to avoid the idiot driver. This was immediate before seeing coolant on my garage floor. Could this be in any way related??? My gut says No, but I have seen strange things happen in this crazy world.