The 2.2L or the 4.3L engine?
Next to the thermostat housing.
Could be a faulty temp sending unit.
any auto parts store will have that item
The 4.3 temp sending unit for the gauge is located in the drivers side head between spark plugs 3 & 5.
how do you replace the fuel sending unit
The temp sending unit may be at fault.
You may find two temp sending units on that S10. One next to the thermostat housing and one between #3 and #5 spark plugs. The one with one wire attached would be feeding the temp gauge, the one with two wires attached would be feeding the ECM.
The fuel tank has to be removed to gain access to the fuel sending unit. The fuel sending unit and the fuel pump is replaced as a unit.
In the fuel tank. Fuel tank must be removed to gain access to the sending unit.
In the fuel tank. The fuel tank needs to be removed to gain access to the sending unit.
Didn't have an air temp sensor in 92. Came out in 93.
Assuming you mean the engine coolant temperature sending unit, we need to know what engine it has, it makes a difference.