Circuit/System Description
WARNING: This page is about a different car, the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The transfer case in the Auto 4WD mode attempts to correct for slip by monitoring the front and rear wheel speed sensors. If the transfer case is unable to correct for slip when there is a difference between the front and rear speed sensors the transfer case will apply the clutch. If the transfer case in unable to correct this slip and the clutch begins to heat up based on a thermal model inside the transfer case control module this DTC will be set.