On the front of the engine more or less behind the fan pulley. You'll see a domed section of water pipe...under there.
Sounds like you need to replace the thermostat.
How do you adjust the emergency brake on your 2001 S10 Chevy?
If you follow the upper radiator hose to the engine, the hose is attached to the thermostst housing. The thermostat is located under the thermostat housing.
2001 4x4 s10 lug pattern
235x70x15 this tire size on my 2001 s10 blazer
There is no 2001 S10 with a V4 engine.
firing order pick up s10 2001
Check your heater core and thermostat. The thermostat may be stuck open. Does the S10 run hot or cold?
Start with replacing the thermostat.
It goes around the thermostat if you are talking about the Chevy S10 4.3L engine.
It should have a 195 degree thermostat.
Probably a 195 (F) degree thermostat. That would be what the system is designed for.