Could be a problem with the thermostat housing or it's gasket, could be a problem with intake manifold gaskets, could be a problem with heater hoses or the fittings that screw into the manifold.
can a chevy truck with a 350 engine with a tbi cause detonation and pre- ignition?
The heater core is stoped up / MAYBE. Are the engine is low on coolant, Check coolant level in radiator.
The coolant sensor moniters the coolant temperature. A faulty thermostat could cause the engine to run cool.
The heater will stop getting hot when you're low on coolant. If the coolant is low enough the engine will overheat and it will be severely damaged.
Green coolant
It uses the ORANGE coolant.
No it will not.
The coolant temp sensor on a 2002 Silverado with the 6.0 engine is located on the drivers side cylinder head close to the front of the cylinder head.
sould be on the manifold
Excessive internal engine wear (bad rings)
Yes
First check the truck for coolant leaks, make sure the coolant level is o.k. If it is there could be a blockage in the radiator or hoses if you have no idea what you are doing take it to an automotive repair facility an overheat could cause severe engine damage