Need to know what engine and what year.
If it has a 4.3L engine the temp sensor is located next to the thermostat housing.
The coolant temp sensor on a 2003 Chevy S10 V6 is located on the front of the intake manifold. To replace simply unscrew the old sensor and screw on the new one.
The sensor for the temp gauge in the 96 S10 4.3L would be the sensor located between #3 and #5 spark plugs, it has one wire plugged to it. The temp sensor for the ECM is located next to the thermostat housing, it has two wires plugged to it.
The engine coolant temp (ECT) sensor on that 97 S10 2.2L would be found close to the thermostat.
Didn't have an air temp sensor in 92. Came out in 93.
Temp sensor for the gauge.
A faulty engine temp sensor can do that.
On the 4.3L it is located next to the thermostat housing. The electrical plug to it has two wires.
located coolant temp sensor
A bad engine temp sensor can do that.
The 1994 S10 uses a MAP sensor, not a MAF sensor. We need to know size engine you have in that S10.
Next to the thermostat housing.