Circuit/System Verification

WARNING: This page is about a different car, the 2016 Buick LaCrosse. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

If DTC C056 with failure type byte 4B is the only DTC set, all that should be needed is to perform the distance sensing cruise control module learn procedure.

Verify DTC C056E 4B is not set.
- If DTC C056E 4B is set
1. Perform the distance sensing cruise control module learn procedure. Refer to Distance Sensing Cruise Control Module Learn Procedure .
2. Verify the DTC C056E 4B does not set.
  - If the DTC C056E 4B sets, replace the K14 Distance Sensing Cruise Control Module.
  - If the DTC C056E 4B does not set
3. All OK.
- If DTC C056E 4B is not set
All OK