Circuit/System Verification
WARNING: This page is about a different car, the 2010 GMC Terrain and 2010 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
- Verify there are no other U code DTCs set.
- If other U code DTCs are set, diagnose them first. Refer to Control Module U Code List .
- Refer to Data Link References to determine if the control module setting DTC U0074 is on the mid speed or chassis high speed serial data circuits.