My 1998 jimmy has always leaked antifreeze but the last month it has got bad to were i have to fill it up everyday

There could be many causes for a small leak, including foreign debris, small crack or loose hose. Using just water with no antifreeze can damage your radiator in sub 32 temps so always mix with coolant/antifreeze. One temp solution is buying stop leak from a auto part store, another remedy I've heard work is putting black pepper (finely ground) in your system to stop small leaks and it actually works. Good luck.

If nothing is leaking externally from engine area, then I'd have my exhaust analyzed for coolant coming out the exhaust. Bad intake gasket or head gasket usually indicated by coolant out the exhaust pipe.

If its Gasket leakage then it will give you starting problem too,if not then water pump or may be radiator etc try to search leakage.

Try checking your antifreeze levels. If you antifreeze tank is low try filling it to the "Fill" or "Full" level. If your antifreeze tank is empty, remove your radiator cap, (make sure the engine has cooled off. If you try to open it while it's hot, you could get sprayed with hot antifreeze) and fill the radiator slowly. Then refill your antifreeze tank. Remember to always mix the antifreeze with water (50/50 mix) for full protection.

A leaking manifold could cost you a VERY expensive repair. I recommend getting it fixed as soon as you can. And with the antifreeze...seeing how it it a GM it should take DEX-COOL. But look under the hood and look for a white sticker and it should say "This vehicle takes DEX-COOL coolant. Do not mix with any other coolant" and if not the cap for the coolant should say so. If so, then obviously you need DEX-COOL or universal coolant. Universal will not harm anything, but I would use the manufacters reccommendations just on the safe side.

Could be a leak in the coolant fill tank, or hose between tank and radiator

buy a drain pan,drain the liquid and take it to your local steets and roads department,they have a recycle center there for free in domestic amounts.

First things first don't use Dexcool.

It would happen only once in a while likely because the overflow bottle doesn't always fill to the point of where the leak is located. It would be very easy to unbolt the bottle and fill it with water to find the leak and patch it up.

If you crank or start he engine and the antifreeze blows out for the radiator it is due to blown head gasket pushing cyl. compression into the cooling system. The head will have to come off.

There could be a leak in the radiator or the water pump. Or the overflow coolant bottle but that normally won't drain all of the coolant. Fill up the radiator when the car is cold and start the car and keep an eye on it to see where the leak is coming from.