Action Taken When the DTC Sets
WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
- DTC C398 disabled.
- All shifting disabled.
- Clutch torque increased to maximum torque.
- The SERVICE 4WD indicator remains illuminated for the remainder of the current ignition cycle.