overheating problem 2004 silverado

Have you pressure checked the system for leaks?
Are you getting antifreeze in the oil or oil in antifreeze?
After replacing the parts was the system properly refilled to prevent air bubbles, particularly in the heater core?
Is antifreeze flowing sufficiently while the engine is running to indicate no system blockages?

tbplus10 said:

After replacing the parts was the system properly refilled to prevent air bubbles, particularly in the heater core?
Is antifreeze flowing sufficiently while the engine is running to indicate no system blockages?

Click to expand...

Good call! An air lock would definetly cause overheating...
www.gmpartsclub.com

this may sound dumb, but what about the raditor cap? did you replace it? i seen many systems overheat due to this issue. the seal is bad and does not allow the system to prusure up some and overheat.......mike

did you burp the system if its like the 99 i did my like the chilton manual says which i cant remember off the top of my head but you have to run it a few thousand rpm and let drop and then bring up again and let it drop then shut if off and burp the system then do it again and it worked fine my truck hasnt gone over since been fine.

I agree - replace the radiator cap, too.

This is normally a closed system under pressure. The added pressure helps keep the fluid from boiling. Boiling means vapor in the system - vapor means hot spots and could mean starving water pump, too.

Besides, it's only $10 at the parts store.

CaJuN625 said:

This is normally a closed system under pressure. The added pressure helps keep the fluid from boiling. Boiling means vapor in the system - vapor means hot spots and could mean starving water pump, too.

Besides, it's only $10 at the parts store.

Click to expand...

assuming you found the problem! I suggest you try Water Wetter from Red Line. This stuff works amazingly! I have on my cooling system and it does work. I dropped around 25 degree!! make sure the ratio is 80% water and 20% anti freez.