Hello, 1997 Grd Prix gt and I noticed the engine started to overheat. Well like a DA before checking I added green coolant. Now my radiator is draining into a bucket in my garage. So is it mandatory that I replace with dexcool or could I flush and fill with any other coolant?? I'm new to this 159,000 mile car so I don't know what has been put into it before my idiocy. Secondly can I flush with a garden hose and what about the coolant already inside the engine.How much antifreeze/coolant does it require?? Keep in mind that I'm nearly flat broke.
