Circuit Description
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1998 GMC Yukon, 1998 GMC Suburban, 1998 GMC Pickup, 1998 GMC Cab & Chassis, and 1998 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
ATC control module controls engagement and disengagement of front axle by grounding Gray/Black wire circuit from ATC control module to front axle actuator. Front axle is disengaged in 2H and Neutral only and should be engaged in all other modes. This DTC detects shorted actuator or a short to voltage on the circuit.