PIE0588

Subject:
Engineering Information - After Battery Discharge, Jump Start and/or Battery Replacement DTCs B3925, B3926, B3927,
B389A, B3978, B3979, B3980 and B3981 Set
Attention:
Proceed with this EI ONLY if the customer has commented about this concern AND the PIE number is listed in the
Global Warranty Management / Investigate History link (GWM/IVH). If the customer has not commented about this
condition or the EI does not show in GWM/IVH, disregard the PIE and proceed with diagnostics found in published
service information. THIS IS NOT A RECALL — refer to Service Bulletin 04-00-89-053 for more details on the use of
Engineering Information bulletins.
Brand:
Buick
Model:
Model Year:
Enclave
VIN:
from
to
from
to
2019
2020
-
-
Engine:
Transmission:
-
-
Chevrolet
Equinox
GMC
Acadia
Terrain
Involved Region or Country
North America
Condition
Important: If the customer did not bring their vehicle in for this concern, DO NOT proceed with this EI.
Technician may find the following DTC’s set after a battery discharge, jump start and/or battery replacement.
•
B3925 -Incorrect Environmental Identifier Received From HVAC Control Module
•
B3926 - Incorrect Environmental Identifier Received From Instrument Cluster
•
B3927 - Incorrect Environmental Identifier Received From Electronic Brake Control Module
•
B389A - Environment Identification
•
B3978 - Incorrect Environmental Identifier Received From Inflatable Restraint Sensing and Diagnostic
Module
Cause
•
B3979 - Incorrect Environmental Identifier Received From HVAC Control Module
•
B3980 - Incorrect Environmental Identifier Received From Instrument Cluster
•
B3981 - Incorrect Environmental Identifier Received From Electronic Brake Control Module
GM Engineering is attempting to determine the root cause of the above condition. Engineering has a need to
gather information on vehicles PRIOR to repair that may exhibit this condition. As a result, this information will be
used to "root cause" the customer's concern and develop/validate a field fix.
Correction
If you encounter a vehicle with the above concern, perform a Vehicle Wide DTC report using GDS2 and also perform the information ID on the BCM and ECM and
store the calibration part numbers for review. Contact the engineer listed prior to attempting further diagnosis or repair. Engineering will provide the technician specific
instructions for the repair procedure and request part return.
Contact Information
The Contact Information has been redacted.
1
Please include the following information if leaving a message:
–
Technician name
–
Dealer name and phone number
–
Complete VIN and repair order (R.O) number
On the repair order, document the date and time the call was placed (even if the engineer was not reached).
If engineering is unable to return the call within one hour, proceed with diagnosis and repair based on information found in SI.
Warranty Information
If engineer was contacted or required information was provided, use:
Labor Operation
Description
Labor Time
4087618*
Engineering Information - After Battery Discharge, Jump Start, Battery
Replacement, Multiple DTCs Set
0.4 hr
* This is a unique labor operation for bulletin use only.
Version
1
Modified
Released October 09, 2020
2