TrailBlazer 2WD L6-4.2L VIN S (2003)
Accelerator Pedal Position Sensor: Description and Operation
The APP sensor is mounted on the accelerator pedal assembly. The APP is actually 2 individual APP sensors within 1 housing. There are 2 separate
signal, low reference, and 5-volt reference circuits. APP sensor 1 voltage increases as the accelerator pedal is depressed. APP sensor 2 voltage decreases
as the accelerator pedal is depressed.
