New Accelerator Pedel Position Sensor (APP Sensor) for all 6.5TD C/K pick-up's and Suburbans. This is the complete pedel assembly with sensor that controls your engine speed. This sensor is the "drive by wire" device used on all 6.5TD trucks 94 and newer that replaced the traditional throttle cable as used on 93 and earlier trucks. Replace when throttle response is erratic, "check throttle" light comes on or when ses codes report APP sensor failure.