General Information

The automatic 4-wheel drive transfer case system consists of the following:
^ automatic 4WD indicator light
^ Brake Pedal Position (BPP) switch
^ Torque On Demand (TOD) relay
^ front output shaft speed sensor
^ Generic Electronic Module (GEM)
^ 4WD high indicator light
^ 4WD low indicator light
^ 4WD mode switch
^ rear output shaft speed sensor
^ shift position sensor
^ Throttle Position Output (TPO) from the Powertrain Control Module (PCM)
^ transmission range sensor