PI1233

File in Section:
Service Bulletin
Bulletin No.:
Date:
PI1233
May, 2014
PRELIMINARY INFORMATION
Subject:
DTC Symptom Byte Documentation
Models:
2011-2015 GM Passenger Cars and Light Duty Trucks
Condition/Concern
When job cards are submitted, DTC symptom byte information is required.
Recommendation/Instructions
When documenting DTC information, the DTC symptom byte needs to be included along with the module it was set
in. Please enter the DTC and Symptom Byte information in the "Cause" section of the GWM claim. For example:
B0014 0D (where the first four characters are the DTC and the last two are the symptom byte).
With the added technology within the vehicle, adding the symptom byte to the documentation speeds up the process
and pinpoints the problem for the supplier and engineering when trying to root cause a vehicle problem. For further
information please refer to section 1.6.2.10 – Details of Cause and Correction in the GM Service Policies and
Procedures Manual. In Canada, see 1.6.2 c - Details of Customer Concern, Cause of Failure and Correction.