Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The Service 4 Wheel Steer indicator in IPC will be displayed.
The code is displayed on scan the tool as DTC C0550.
The output command to the motor is zeroed. The motor drive circuits are disabled using commands from the rear wheel steering control module to open the power relay.
The rear wheels will be returned to the default centered position.