It should have a 195 degree thermostat.
An alternator from a 2000 Chevy blazer will fit a 2002 S10 blazer with a little fabrication.
Will a Chevy blazer engine fit in a Chevy s10 pickup
No it does not if it is a s10 blazer
We need to know what year that S10 Blazer is.
Chevy s10 blazer lug pattern is 5x4.75 with 6" back spacing
Will a 2000 blazer transmission fit a 1998 s 10 chevy 4x4 truck
It depends on what year S10 you have.
The temp sensor for the ECM (engine control module) is next to the thermostat housing.