Diagnostic Aids

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

This DTC may be stored as a history DTC without affecting the operation of the side object sensor module - left.
Do not replace the side object sensor module - left based only on DTC B101D being set in history.
If DTC B101D is set as current, replace the side object sensor module - left.
Because the side object sensor module - left is the master, if it is replaced there still may be a concern with the side object sensor module - right as the module may have been unable to report it. Once the side object sensor module - left is replaced, check for DTCs and verify operation of the system to assure proper functionality.