I have a 2023 Silverado with the 6.2. It has 29K miles on it. In June, I noticed the coolant level in the overflow tank was a bit low, like a quarter or a third of an inch down. I topped it off then. Today it is again down about a quarter of an inch. I'm checking the level when the engine is cold, of course. Is that normal/OK?
I once had a Subaru that also seemed to need semi-regular topping off, but I also noticed on that car, once the level in the tank was down about half an inch, it did not drop further. Should I leave me truck as-is for now and keep watching it, or top it off again?