No.
The manifold gasket is the same as the plenum gasket. The manifold gasket is a barrier between the manifold and the engine block.
yes it is
Valve cover gasket holds oil from the valves from leaking off the top of the head . Head gasket is lower and holds cylinder pressure between the cylinder head and the engine block.
Upper intake manifold plenum leak/crack most likely. If its blowing out coolant then you probably have a bad head gasket.
very carefully
It is on the underside of the intake manifold
ummm....junk it? Probably a shot head gasket. You cab probably DIY at home if you have the tools and a manual.
My first gues would be a blown head gasket, the same thing happend to my s-10 when the head gasket gave out.
My husband has the same truck and it only has 90,000 miles on it and he blew a head gasket yesterday. Do you have any suggestions?
Which plenum-intake or. . . .
Not sure what engine you are working on but if you are using a new gasket there is no need for silicone unless the directions included with the new gasket require it.
NO. The valve cover gasket seals the valve cover from leaks. The valve cover covers the valve train and it's components and it bolted to the top of the head. These components sit atop the head. The head is bolted directly to the engine block with another gasket. Water and oil flow through the head.