Electronic Control Unit Hardware
Table of contents
C056D GMC Possible Causes
- Faulty Electronic Control Unit
- Electronic Control Unit harness is open or shorted
- Electronic Control Unit circuit poor electrical connection
How do I fix code C056D GMC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the C056D GMC code
The cost of diagnosing the C056D GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Anti-Lock Brake System (ABS) Warning Light ON
- Engine Light ON (or Service Engine Soon Warning Light)
C056D GMC Description
The internal fault detection is handled inside the control module. The symptom byte listed in the DTC Descriptor is for engineering reference only. No external circuit diagnosis is involved.