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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
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!
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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!