Is there a way to test the Throttle Position Sensor? on 2000 Chevrolet Blazer

My Blazer shifts hard into third gear. Is there a way to test the Throttle Position Sensor or the Transmission control solenoid before replacement?

Asked by for the 2000 Chevrolet Blazer
1 answer
Scanner needed, TPS knows nothing about which gear it's in or shifting into, although it will affect ALL gears and shifts!! Again scanner needed to check trans module!