The accelerator pedal sensor assembly combines the familiar accelerator pedal with a dual output sensor for a drive by wire application. The throttle cable is replaced by a pedal position sensor to continuously measure driver input. Standard® and Intermotor® Accelerator Pedal Sensors undergo testing of output voltage versus pedal position, where the slope and linearity of the two separate outputs are accurately checked to ensure correct operation on the vehicle.
This video goes over how to replace the accelerator pedal position sensor on a Chevy Silverado 2500 6.6L