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Service bulletin 18125

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10143410
Published by NHTSA2018-08-06
Manufacturer's number18125
Manufacturer's date2018-05-03
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY

NHTSA's summary

18125 - Customer Satisfaction Program. Certain vehicles may have a condition where the software will not detect the difference in the state of charge between the cell groups of the battery and over predict the indicated battery range. The current software may not provide sufficient warning prior to a battery cell low range condition, which may result in a loss of propulsion. Only certain vehicles will experience the battery low voltage cell condition. Reprogram hybrid powertrain control module 2.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, 12-volt battery, Software

Vehicles listed
CHEVROLET BOLT EV2017, 2018

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
20-NA-1322024-04-05. Service bulletin. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
PIP5632G2023-01-30. Service bulletin. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
PIP4902Q2023-01-30. Service bulletin. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
22-NA-1192022-08-03. Service bulletin. The service bulletin provides warranty information on High Voltage Battery Safety Recall Replacement Parts.
N212345750012022-06-27. Service bulletin. High Voltage Battery Software Update
N2123457502022-06-27. Service bulletin. High Voltage Battery Software Update
20NA1322021-12-20. Service bulletin. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements.
17297-012021-04-29. Service bulletin. Certain 2017 model year Chevrolet Bolt EV vehicles may have a condition in which the cells within the battery pack have low voltage. This condition is related to the state of charge of the cell group. Eventually, the difference in the state of charge of the cell groups (average vs. minimum) may exceed a threshold. Correction Replace the high voltage battery pack.
150603002H2021-04-16. Service bulletin. Original Equipment Batteries Part Number and ACDelco Replacement Battery Approved Warranty Part Numbers Correct battery cold cranking amperage (CCA) ratings and type are critical for proper test results when using the EL-50313. Access to the battery specification label, which contains the OEM part number and CCA rating and type, may be difficult without component removal. Refer to the table below for the original equipment ratings and part numbers used to set up a proper battery test. There has been some confusion as to the correct ACDelco battery warranty replacement. Refer to the table below for the correct battery warranty replacement. The correct ACDelco battery warranty replacement in the catalog is designated by the "Original Equipment Replacement" note in the description field.
16NA0192021-02-01. Service bulletin. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.