23-NA-051

Bulletin No.:
Service Bulletin
Date:
23-NA-051
March, 2023
INFORMATION
Subject:
Brand:
Chevrolet
Information on New Cell Chemistry N2.2A Vehicle/Pack Identification
Model:
Model Year:
from
Bolt EV
2017
Bolt EUV
2022
VIN:
to
from
to
2023
—
—
Engine:
Transmission:
All
All
Involved Region or Country
North America Only
Additional Options (RPOs)
Equipped with RPO EKZ
Condition
Due to manufacturing changes in cell chemistry, certain 2023 Bolt EV and EUV vehicles
will be built with N2.2A chemistry cells in the High Voltage Battery pack. N2.2A cells
cannot be used in a vehicle designed for N2.2 cells, and N2.2 cells cannot be used in a
vehicle designed for N2.2A cells.
Additionally, cell chemistries cannot be mixed within a pack. An N2.2A CMA (section)
cannot be put into an N2.2 pack, and vice versa.
Cause
Dealers must ensure the correct part number is ordered and installed in any vehicle
receiving a replacement battery pack or battery section.
Correction
The Investigate Vehicle History (IVH) RPO list for each VIN will identify any vehicle that is
built with N2.2A chemistry by having EKZ listed in the Vehicle Build section. EKZ was
introduced as a mid-year change for the 2023 model year.
All Bolt HV batteries have a label on their exterior designating either N2.2 or N2.2A
chemistry. It is important to verify the correct chemistry is being installed into the vehicle
both by part number and by looking at the label on the battery itself.
When performing internal pack repair of individual sections or components, care must be
taken to ensure N2.2 packs are only repaired with N2.2 sections, and N2.2A packs are
only repaired with N2.2A sections. Two different cell chemistries can never be put in the
same pack. Individual sections will have a label designating N2.2 or N2.2A.
Service Procedure
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.
6300609
Copyright 2023 General Motors LLC. All Rights Reserved.
Page 2
March, 2023
Bulletin No.: 23-NA-051
For N2.2A – Mid 2023 Model Year
Inspect HV Battery label (similar label shown above) for
N2.2A chemistry and verify vehicle has EKZ.
For N2.2 – 2017-2023 Model Year (With
recall completed)
Inspect HV Battery label for N2.2 chemistry and verify
vehicle does NOT have EKZ.
Version
1
Modified
Released March 20, 2023
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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