Check the water pump drive shaft. If water is leaking from the hole beneath the drive, it's definitely a bad water pump seal and you can't repair them.
There are many gaskets and hoses that can leak. If you can't find it take it to a garage.
silicone spray helps wipe it on all rubber gaskets and wherever the gasket touches metal
you probably have an blown intake gasket and/or a blown head gasket. The gm gaskets do not hold up to the red coolant and are eaten away. I just had it replaced on mine.
probably 10.
no heat and rising temp are simply a product of the coolant leaking (low). Most likely cause of leak (assuming all heater hoses have already been checked for leaks is the intake manifold gaskets. GM used solid PLASTIC gaskets on these motors with o-ring type seals around the ports and over time develop leaks between the cylinder head and intake manifold. A gasket set by Felpro is now made w/ steel inserts/molded rubber seals to rectify the problem. requires removal of intake manifold. I have done several of these with the same problem.
most likely cause is your heater core leaking
if you have a leaking water pump gasket i thing bay a new one is better
It could be the coolant overflow tank that is leaking.
I did an intake gasket on a 2004 astro awd 4 month ago. It not that hard but you got to remove everything around of the engine compartment. It took me maybe 5 hours. U got to be a little flex to work with it . GOod luck
Could be Intake Gaskets, a common problem for this vehicle. Be sure to check for pin holes in the hoses that may give the illusion of a leak elsewhere when they spray a tiny stream under pressure.
I just replaced one on my 1992 astro and it was $120 just for the distributor not including the rotor and cap
The PCV valve on a 1999 Astro should be located on top of the valve cover. It plugs in and can be easily replaced.