Circuit/System Verification
WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Verify DTC C056D is not set.
- If DTC C056D is set NOTE:
Check for faulty connections or corrosion at the K43 Power Steering Control Module harness and engine wiring harness before replacing the K43 Power Steering Control Module.
Replace the K43 Power Steering Control Module.
- Go to next step: If DTC C056D is not set
- If DTC C056D is set
- All OK