Have you cheked the levels yet? I think that's a good place to start, as these guys have said.

 

Sounds like you are going through somthing I am going through right now only the opposite. My guage isnt reading right because it doesnt get up to temp...I would change the thermostat sensor like I plan on doing.

 

do you know where it is on a 92 s-10 blazer 4.3 or even pics.thanks

 

its imediately to the left of the thermostat on the 92 tbi.

 

And where is the thermostat. Heh, I think someone who knows where it is should take a pic of it considering there are quite a few of us that would like to know.