24-NA-015 Service Bulletin/Repair Instructions

Bulletin No.: 24-NA-015
Service Bulletin
Date: February, 2025
INFORMATION

Subject:

Brand:
Hybrid/EV Charging Issue Information and Data Collection Worksheet

Model:
Model Year:

from
BrightDrop
Cadillac
Chevrolet
GMC
VIN:

to
Zevo 400
2023
Zevo 600
2024
Escalade IQ
2024
2025
LYRIQ
2024
2025
OPTIQ
2025
2025
VISTIQ
2026
2026
Blazer EV
2024
2025
Bolt EV
2017
2023
from
to
—
—
Propulsion:
Transmission:
Hybrid/EV
All
2024
Bolt EUV
2022
2023
Equinox EV
2024
2025
Silverado EV
2024
2025
BrightDrop 400
2025
2025
BrightDrop 600
2025
2025
HUMMER EV Pickup
2022
2025
HUMMER EV SUV
2024
2025
Involved Region or Country
North America, Argentina, Brazil, Chile, Colombia, Ecuador, Peru, Uruguay, Europe,

Middle East, Israel, Palestine, Japan, Cadillac Korea (South Korea), Egypt
Information
This bulletin and worksheet within are to assist with data collection, diagnosis, and repair

for Hybrid/EV charging issues.
Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws

applicable to the activities it performs under this bulletin, including but not limited to handling, deploying,

preparing, classifying, packaging, marking, labeling, and shipping dangerous goods. In the event of a

conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you

must follow those applicable laws.

Important: This technical service bulletin (TSB) can only be completed by certified repair facilities who have

met all specific training, tool and equipment requirements pertaining to the vehicle Brand and Model

serviced. Repairs must be performed by a technician who has successfully completed the required training.
Information Collection

For diagnostic information, please reference Service Information (SI). Contact the GM Technical Assistance Center

(TAC) via Dealer Case Management (DCM) or @ 877-446-8227 (U.S.). Canada 1-800-263-7740 (English) or

1-800-263-7960 (French) AFTER all relevant information is collected to review case details. Please submit a photo

of the worksheet below, session log (if applicable), and any other relevant information. Reference the latest version

of PIP5632 for session log data collection.
GDS2 Charging Information

Note: Specific GDS verbiage may differ depending on application.
Copyright 2025 General Motors. All Rights Reserved.
Page 2
February, 2025
Bulletin No.: 24-NA-015
Ultium Vehicles

K16 Battery Energy Control Module – Data Display – AC Charge History Data

K16 Battery Energy Control Module – Data Display – DC Charge History Data

K16 Battery Energy Control Module – Data Display – Charge Port- Data

K16 Battery Energy Control Module – Data Display – Hybrid/Electric Vehicle Battery AC Charger Data

K16 Battery Energy Control Module – Data Display – Hybrid/Electric Vehicle Battery DC Charger Data

K16 Battery Energy Control Module – Data Display – Thermal Management Propulsion, Battery, and Electronics

K16 Battery Energy Control Module – Data Display – Hybrid Battery Pack Contactor Open Reasons

K16 Battery Energy Control Module – Identification Information – Identification Information

Bolt EV / EUV

K114B Hybrid/EV Powertrain Control Module 2 – Data Display – Battery Charger Control Module Data

K114B Hybrid/EV Powertrain Control Module 2 – Data Display – Charge History Data

K114B Hybrid/EV Powertrain Control Module 2 – Data Display – Contactor Data

K114B Hybrid/EV Powertrain Control Module 2 – Data Display – Hybrid Battery Pack Contactor Open Reasons

K114B Hybrid/EV Powertrain Control Module 2 – Data Display – DC Battery Charger Data

K114B Hybrid/EV Powertrain Control Module 2 – Data Display – DC Charge History Data

K114B Hybrid/EV Powertrain Control Module 2 – Identification Information - Identification Information & Control

Module ID Information
Diagnostic Tips

AC and DC charging utilizes different circuits and components; therefore, testing should focus on the applicable

charging type.
Hybrid / EV Charging Analysis Worksheet

Hybrid / EV Charging Analysis Worksheet

VIN:______________________________________ Year:___________ Make:__________________

Model:_______________________

Date:________________ Odometer:_____________ Ambient Temp:_____________

Customer Issue

Description:______________________________________________________________________________________

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_

DTCs:_________________________________________________________________________________________________

_

K16 or K114B Application S/W Part Number

1:________________________________________________________________________

K16 or K114B Calibration Part Number

1:____________________________________________________________________________

Can the issue be duplicated:_________________________ Issue

Occurrence:______________________________________________

Has any diagnosis or repair attempts been performed to

date?:___________________________________________________________

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_
Bulletin No.: 24-NA-015
February, 2025
Page 3
Hybrid / EV Charging Analysis Worksheet

L1-120v (AC), L2-220v (AC), L3-440v+

(DC)Charge:___________________________________________________________________

Issue Location (Public/

Home):_____________________________________________________________________________________

Vehicle Charge Indicator Light (Flashing, pulsating, On, Solid, Off,

Color:___________________________________________________

Color or Sequence of LEDs on

Charger:______________________________________________________________________________

______________________________________________________________________________________________________

_

Is the issue limited to one charger or multiple?:__________________

Charge kW:__________________________________________

EVSE/Charger

information:________________________________________________________________________________________

Station Provider & Station

ID:_____________________________________________________________________________________

Messages or Errors displayed on the IPC or Charge

Station:______________________________________________________________

Does this happen at a specific State of Charge or time (If so provide

details):________________________________________________

______________________________________________________________________________________________________

_

Was the vehicle Preconditioned prior to DC Fast Charging (If so, how

long):_________________________________________________

Was the vehicle charging in Propulsion Ready:___________ Was the heat or air conditioning used at time of

issue:______________________________

Home Target Charge Level:___________________________ Away Target Charge

Level:______________________________________

Charge Now (Y/N):_______________________ Time of Day Charging:________________ Home Location enabled(Y/

N):____________

Vehicle to Vehicle Charging(Y/N):______________________ Vehicle to Home Charging(Y/

N):___________________________________

Is an CCS NACS adaptor being used?

________________________________________________________________________________

Aftermarket Accessories/

Other:____________________________________________________________________________________

Ask for p/n on CCS NACS adapter ___________________________________

Is vehicle experiencing slow or derated/reduced charging? ___________________________________

Any Debris in charging inlet? ____________________________

Is the Ultium power bar working? ____________________________

Has the charge inlet manual release cable been pulled? ____________________________

Verify charge settings on infotainment screen are accurate with customer ____________________________

Verify coolant level ____________________________

Additional

Notes:________________________________________________________________________________________________

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_
Page 4
February, 2025
Bulletin No.: 24-NA-015
Hybrid / EV Charging Analysis Worksheet

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_

______________________________________________________________________________________________________

_

Please provide any photos, videos, session log(s) or any other relevant information.
Note: Please provide any photos, videos, session log(s) or any other relevant information.

Version
4
Modified
Released January 23, 2024

Revised September 25, 2024 – Added Models and the 2025 Model Year and added

additional questions to worksheet.

Revised December 12, 2024 – Removed Cadillac CELESTIQ and added Cadillac

OPTIQ.

Revised February 26, 2025 – Added Cadillac VISTIQ and updated Involved Region or

Country section.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these

technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper

service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job

properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your

vehicle will have that condition. See your GM dealer for information on whether your vehicle may beneﬁt from the

information.
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