How do you test a tps on a 1997 Chevy lumina?

To test the Throttle Position Sensor (TPS) on a 1997 Chevy Lumina, first, locate the TPS on the throttle body. Use a multimeter to check the voltage output by connecting the positive lead to the sensor's signal wire and the negative lead to a ground. With the ignition on (but the engine off), the voltage should be around 0.5 to 1.0 volts at closed throttle and increase smoothly to about 4.5 to 5.0 volts at wide open throttle. If the readings are outside these ranges or show erratic behavior, the TPS may need replacement.