Wow your Bravada sounds nice. Well to make a long story short.

About 2 years ago when my parents had this Blazer, they took it into the shop and because of something with the dexcool or whatever you want to call it, it completely corroded the waterpump, radiatior, intake gaskets, etc. Atleast that is what GM dealership said. So my parents took it to their brother (my Uncle) who is a foreman for a Ford dealer and he flushed it, removed the dexcool and replaced it with green antifreeze. He said its really not that great for aluminum and if when using the dexcool if air gets into the system it can have major problems. Ok Update on my truck. Heater hoses are very hot, same with upper radiator hoses, I can feel the fluid running through.

I have replaced the following:
Thermostat 195
Radiator Cap (pressure thing)
Temp Sensor (hey it was cheap)

Like I said before I am going to get the system flushed along with the heater core.
I believe the only things I can think of now maybe the fan clutch. What do you guys think?
And if I can check it, how do you know it would be bad? Signs? or anything?

 

Ok I just wanted to say thank you for everyones help. I went today to get my heater core reverse flushed and all that. Low and behold I have heat. thanks again for a great forum.
Brian