Conditions for Setting the DTC
WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
C0393 01
The rear differential clutch control module determines a short to battery on the rear differential clutch solenoid valve control circuit.
C0393 02
The rear differential clutch control module determines a short to ground on the rear differential clutch solenoid valve control circuit.
C0393 5A
The rear differential clutch control module determines a signal plausibility failure.
C0393 61
The rear differential clutch control module determines the differential clutch pump is stuck.