drain on bottom of radiator, only flush if it's real dirty and brown, otherwise just drain and refill... also in the book ...everyone should have a manual for their vehicle, and the library should have a professional shop manual available for FREE to make copies of...read up and repair like a PRO! Dave :)
You fill it from the overflow jug located on the passenger side of the engine compartment
there may not be one if there is is it on the bottom side and if it is not you candrain it by removing the bottom rad hose The 1999 Pontiac Grand Am does not have a radiator drain valve. To drain the radiator, remove the lower radiator hose. The engine should be cold and the water fill cap removed for venting. I have a 2000 Pontiac Grand AM and radiator drain cock is located at the lower/front (not bottom) at the curbside of the radiator, you will need a hex key to back out petcock. .
There is not one. You just have to loosen the bottom radiator hose and open the fill cap on the antifreeze reservoir when the vehicle is cool.
Open the radiator petcock and drain coolant into a container. Dispose of all coolant properly as it is toxic to animals. Close petcock and fill system with water. Run the engine for several minutes with the heat on high. Drain the system again. Several repeats of this procedure will flush the radiator and engine for the Firebird.
While cold fill through radiator cap until full, then fill reservoir at front of car to the " cold " or full level.
no the system is not a sealed system and you can do a flush and fill your self i have done it twice i would suggest if it currently has green coolant in it that you flush it and replace the radiator hoses and then fill with the orange stuff called gm dexcool i did this and have nor regreted it and i will do it on my next tracker i get
buy the universal fluid at your local automotive store.
if your radiator is in good condition with no leaks from hoses then i would recommend removing the thermostat out then place the thermostat housing back on top up coolant a check your flow by removing cap from radiator. If flow is good then it sounds like a blown head gasket.
i got a 1991 grand am it is a 5 speed i need to no where to fill it
First open up the radiator, then there's a drain plug on the bottom of the radiator. Fill with water and drain until clear. Fill it up and good to go.
open the petcock drain. remove the radiator cap and fill the radiator with water, the fresh water will push out the old coolant and flush the system. Catch the old coolant inn a container as it is poison to animals.
Too much water/contains rust. need a flush & fill.