Is losing coolant a big deal?
I know the system is a closed system, but I am assuming that a certain amount of evaportation takes place naturally from the seals, etc? The reason I ask is I have an 04 with very mileage. The resevoir was full 9 months ago but now is about an inch below the "Cool Fill to Here" message on the reservoir. Does this happen naturally, like burning oil?
Just curious. The last time this happened on my old Alero I had to spend 600 bucks on lower intake gaskets but I don't know of LS1s having this problem. The oil looks clean on the GTO so I am sure the coolant isn't leaking into the engine. I also have no leaks.