Temp Sensor On 97 T/a

Welcome to the forums. The temp sensor doesn't control your fans and is usually not the problem when GM's electric fans don't work. On computer contolled vehicles you need a good scan tool to start diagnostics, but the relays are usually at fault. But here is a better description of the operation:

Cooling Fan Motor Relay: Description and Operation
The engine coolant fans are activated by coolant fan relays that are controlled by the Powertrain Control Module (PCM). The PCM uses engine
coolant temperature, vehicle speed, and air conditioning high side pressure status to determine coolant fan operation.

DESCRIPTION
The engine coolant temperature sensor is a thermistor (a resistor which changes value based on temperature) mounted in the engine
coolant pump. Low coolant temperature produces a high resistance (100.000 ohms at -40°C/-40°F) while high temperature causes low
resistance (70 ohms at 130°C/266°F).
OPERATION
The Powertrain Control Module (PCM) supplies a 5 volt signal to the ECT through a resistor in the PCM and measures the voltage. The
voltage will be high when the engine is cold and low when the engine is hot. By measuring the voltage, the PCM knows the engine
coolant temperature. Engine coolant temperature affects most systems the PCM controls.
The scan tool displays engine coolant temperature in degrees. After engine startup, the temperature should rise steadily to about 90°C
(194°F) then stabilize when thermostat opens. If the engine has not been run for several hours (overnight), the engine coolant temperature
and intake air temperature displays should be close to each other. When the PCM detects a malfunction in the ECT sensor circuit, the
following DTCs will set:
^ DTC P0117 circuit low.
^ DTC P0118 circuit high.
^ DTC P0125 excessive time to Closed Loop.
^ DTC P1114 circuit intermittent low.
^ DTC P1115 circuit intermittent high.