GENERAL MOTORS
DCS7415
URGENT - DISTRIBUTE IMMEDIATELY
Date:

January 26, 2026

Subject: REVISION: N252530430-01 – Service Update
RESS Diagnostic Calibration Update
Revised Service Procedure, Warranty Information Table
Models: 2020-2023 Chevrolet Bolt EV
2020-2023 Chevrolet Bolt EUV
This bulletin is being revised to update the service procedure and warranty
information table. Please discard all previous copies of bulletin N252530430.
END OF MESSAGE

Service Update
N252530430 RESS Diagnostic Calibration Update
Release Date:
Revision Description:
Attention:

January 2026

Revision:

01

This bulletin is being revised to update the service procedure and warranty information
table. Please discard all previous copies of bulletin N252530430.

This service update includes vehicles in dealer inventory and customer vehicles that return to the
dealership for any reason. This bulletin will expire January 31, 2028.
This is a phased launch.
For EV Involved Vehicles: The repairs outlined in this bulletin must only be completed at an authorized
EV dealer and repairs must be performed by a technician who has successfully completed the
applicable technical training required to perform this repair.
Investigate Vehicle History (IVH) in the GM Global Warranty Management system MUST always
be checked to confirm vehicle involvement and MUST be in OPEN status prior to beginning any
required inspections and/or repairs. DO NOT use Service Information with VIN search, as it will
not verify the VIN eligibility for field actions.
Model Year

Make
Chevrolet
Chevrolet

Model
Bolt EV
Bolt EUV

From
2020
2022

To
2023
2023

Investigate Vehicle History (IVH) in the GM Global Warranty Management system MUST always be checked to confirm
vehicle involvement and MUST be in OPEN status prior to beginning any required inspections and/or repairs. DO NOT
use Service Information with VIN search, as it will not verify the VIN eligibility for field actions.
Condition
Correction
Parts

Certain vehicles listed above may have a condition where a false diagnostic trouble code (DTC) is set.
Dealers are to reprogram the Hybrid Powertrain Control Module 2.

No parts are required for this repair.
Warranty Information
Labor
Operation
9108073*

Description
Verified Module Software or Calibration Level: Module Is
Programmed with Same Level Software or Calibration
Hybrid Powertrain Control Module 2 Reprogramming with SPS

Labor
Time

Trans.
Type

Net
Item

ZFAT

N/A

0.2
0.4

9108074*
ADD: VIN Reconfiguration (RESS pack not previously replaced)

0.3

Important: * To avoid warranty transaction rejections, carefully read and follow the instructions below:

6125814

•

The Warranty Claim Code from the programming event must be accurately entered in the “Warranty Claim Code”
field of the transaction.
•

When more than one Warranty Claim Code is generated for a programming event, it is required to document all
Warranty Claim Codes in the “Correction” field on the job card. Dealers must also enter one of the codes in the

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Service Update
N252530430 RESS Diagnostic Calibration Update
“Warranty Claim Code” field of the transaction, otherwise the transaction will reject. It is best practice to enter
the FINAL code provided by SPS2.
•

For more information about Warranty Claim Codes and retrieving a lost code, refer to 25-NA-281 Information
on SPS Warranty Claim Code Submission and Retrieval in SI.

Service Procedure

7001095
IMPORTANT: The service technician always needs to verify that the VIN displayed in the left side drop down menu (1)
and the top center window (2) match the VIN plate of the vehicle to be programmed prior to using Service Programming
System 2 (SPS2) for programming or reprogramming a module.
IMPORTANT: Failure to follow all notes and cautions within the programming and setup document may result in
programming errors.
1.

2.

Verify whether or not the RESS (High-Voltage Battery Pack) has been replaced using IVH.
•

If the RESS has been replaced, proceed to step 2.

•

If the RESS has not been replaced, refer to 23-NA-157 for further instructions, then return here and proceed to
step 3.

Reprogram the Hybrid Powertrain Control Module 2. Refer to K114B Hybrid/EV Powertrain Control Module 2:
Programming and Setup in SI. Carefully read the programming and setup document for further instructions.

7001097
Important: To avoid warranty transaction rejections, you MUST record the warranty claim code provided on the Warranty
Claim Code (WCC) screen shown above on the job card. Refer to callout 1 above for the location of the WCC on the
screen.
3.

Record SPS Warranty Claim Code on job card for warranty transaction submission. Refer to 25-NA-281 Information
on SPS Warranty Claim Code Submission and Retrieval in SI.
Note: Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection/Maintenance (I/M)
system status indicators to NO.
Programming/Techline Support:
For assistance, Techline Customer Support Center (TCSC) can be contacted using the applicable methods below:
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Service Update
N252530430 RESS Diagnostic Calibration Update
•

For US ONLY: Assistance can be provided by using the Dealer Case Management (DCM) portal in
GlobalConnect. If additional support is needed once the DCM case is created, contact TCSC at 1-800-828-6860.
For US only a DCM case is required for phone support.

•

For Canada: Contact TCSC at 1-800-828-6860 (English) or 1-800-503-3222 (French).

•

For all other regions: Contact your regional Technical Assistance team for Global Techline Support.

Dealer Responsibility
Whenever a vehicle subject to this service update enters your vehicle inventory or is in your facility for service through
the end date as noted in the Attention box, you must take the steps necessary to be sure the service update correction
has been made before selling or releasing the vehicle.
All new, used, GM Certified Pre-Owned (CPO), courtesy transportation vehicles, dealer shuttle vehicles, CarBravo, etc.
in dealers' possession and subject to this field action must be held and inspected/repaired per the service procedure of
this bulletin before customers take possession of these vehicles. Involved vehicles must be held and not delivered to
customers, dealer-traded, released to auction, used for demonstration, or any other purpose.
All GM Certified Pre-Owned (CPO) vehicles currently in the dealers’ inventory within the SHIFT Digital system will be
de-certified and must be held and remedied per the service procedure in this bulletin. Upon submitting an accepted/paid
warranty transaction in the Global Warranty Management (GWM) system, the vehicle can be re-certified for sale within
the SHIFT Digital system, or once again be used in the Courtesy Transportation Program.
Dealer Reports – For USA and Export
The Inventory tab of the Open Vehicle Report will contain Service Update Bulletin VINs that apply to this field action.
This information is intended to assist dealers with the PROMPT COMPLETION of these vehicles. The Customer InService tab will not contain Service Update Bulletin VIN data because the intent of a Service Update Bulletin is to not
inconvenience a customer with a special trip for service. Service Update Bulletins are to be completed when the
customer is in for a regularly scheduled visit.

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 tools, equipment, 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 dealer for information on whether your
vehicle may benefit from the information.

We Support
Voluntary Technician
Certification
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