Circuit Description
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The transfer case shift control module senses rear to front wheel slip, a difference of rear to front wheel speed and attempts to correct the difference by activating the encoder motor, to apply more torque to the front wheels.