Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Verify that DTC C056D is not set.
- If the DTC is set in a control module that can be programmed, program the control module. If the DTC resets, replace the control module that set the DTC.
- If the DTC is set in a control module that can not be programmed, replace the control module that set the DTC.
- If the DTC is set in a sensor, replace the sensor that set the DTC.