If you are sure that it did not freeze and crack the block, Then the intake manifold gasket is leaking. That is a common problem with the vortec Chevy engines. You need to replace the gasket with a factory Chevy gasket from the dealer.
petcocks are usually located on one of the bottom corners of the radiator, on the back (engine side).
The radiator drain plug on a 1989 Chevy C1500 Silverado is on the bottom of the radiator.
Valves will clatter if the engine is overheating.Valves will clatter if the engine is overheating.
Assuming a V8 engine, it's on the top, front of the engine. The thermostat housing is where the top radiator hose goes into the engine.
It is beside of the battery just under the upper radiator hose.
follow the upper radiator hose it would be right at the end of that
Pour the coolant in the radiator.
check engine oil for water and check radiator for oil
there should be a engine decal on the radiator shroud it will have the directions on how to install the serpentine belt the engine size should be on this decal
Depends on where you go.
It's on the coolant reservoir.