Circuit/System Description
WARNING: This page is about a different car, the 2009 GMC Yukon, 2009 Chevrolet Tahoe, 2009 Chevrolet Suburban, and 2009 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The transfer case incremental position sensor and the rotational position sensor are both input to the transfer case control module as to the range or mode the transfer case is in. Both sensors are capable of showing position by degrees. If the two sensors disagree by 5 percent or more this DTC will set.