problem with 01 cavalier overheating and started making high pitch squeal

runs thru engine coolant quickly, no visible signs of leaking or white smoke coming out of tailpipe, and oil looks fine. any help would greatly be appreciated

I have a 00 Cavalier, I had similar issues... First I changed the thermosdat, and replaced the radiator cap. We did a pressure test to see if I was leaking and didnt find a leak. That helped for a few months, then I started losing antifreeze pretty fast. I never saw a leak, checked oil constantly and no antifreeze in the oil. After a few months of this I started seeing that it was leaking a little. It was coming from the water pump. Changed that last week, and now onto a new problem. Not leaking any antifreeze anymore, but my check engine light is on, and today when I was driving I noticed a high pitch whining noise... its the loudest when accelorating. I have no idea what it is yet, but am very scared it is my transmition. However it doesnt have any issues shifting. Good luck. I am kind of wishing I never bought a Cavalier. Its great to drive in the winter, but I am going out of my mind with this antifreeze thing myself. Oh and my heater works fine, and the floor is never wet.