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Service bulletins for the 2018 Chevrolet Volt

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.

850 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
PIP4670J2022-04-18. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about a no start or another concern after swapping an Engine Control Module or other modules from one vehicle to another. The Global Architecture electrical system associated with these vehicles does not allow controller swaps between vehicles.
PIC6275C2022-04-18. Service bulletin. ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE. This Preliminary information communicates a posible loss of 12 volt power to the fuel pump drive module. This is to point the dealer at a possible lose terminal in the instrument panel fuse panel
18-NA-2612022-03-24. Service bulletin. ELECTRICAL SYSTEM. This service bulletin provides a procedure to install a battery energy control module to correct customer concerns of No Start or MIL Illuminated with DTCs.
PIC64502022-03-14. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates a process to correct the concern of Unable to contact OnStar after the 3G EOL on 2015-2022 model year vehicles in the United States.
18239012022-02-14. Service bulletin. ELECTRICAL SYSTEM; AIR BAGS; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); EXTERIOR LIGHTING. Emissions Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain vehicles, equipped with 4-cylinder engines (RPO LHN, LEX, L3A, LYX, LKN, LE2, LCV or LTG). On some vehicles, an electrical connection in the circuit board may fail in the engine control module. If this occurs, a malfunction indicator lamp (MIL), such as the Check Engine Light may illuminate. Replace the Engine Control Module (ECM).
N202307990 launc2022-02-07. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ELECTRICAL SYSTEM. Customer Satisfaction Program. Certain vehicles may have a condition related to the high voltage battery which could gradually lose the ability to maintain voltage. If battery concerns are not addressed, the vehicle could enter a reduced propulsion mode while driving, or lose propulsion, or it may not start. Dealers are to update the Hybrid Powertrain Control Module (HPCM2). This software update is intended to increase the amount of warning time provided.
18239 Dealer Mes2022-02-07. Service bulletin. ELECTRICAL SYSTEM. Emission Recall. Customer Mailing completed September 4, 2018.
18239 012022-02-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); ELECTRICAL SYSTEM. Emissions Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain vehicles, equipped with 4-cylinder engines (RPO LHN, LEX, L3A, LYX, LKN, LE2, LCV or LTG). On some vehicles, an electrical connection in the circuit board may fail in the engine control module. If this occurs, a malfunction indicator lamp (MIL), such as the Check Engine Light may illuminate. Replace the Engine Control Module (ECM).
21NA2592021-12-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; ELECTRICAL SYSTEM. This service bulletin provides diagnostic information to correct customer concerns of Speed Limited Message or Reduced Propulsion Power Message Displayed on Driver Information Center (DIC) with no DTCs Set.
20NA1322021-12-20. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements.
PIC64482021-12-13. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; POWER TRAIN:AUTOMATIC TRANSMISSION. This Preliminary information communicates That Techline connect is Not supporting the progaming of the T6 PIM / HPCM. and advies them to call Techline.
PIT5698B2021-09-13. Service bulletin. ELECTRICAL SYSTEM:ADAS:BLINDSPOT:SENSORS. This Preliminary information communicates additional information on how a LIN bus operates and diagnostic tips when working on a LIN bus.
PIC5650J2021-09-13. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.
19NA2062021-07-19. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. This service bulletin provides repair information to correct a customer concern of seeing an intermittent Shift to Park message displayed while vehicle is in Park.
19NA0442021-07-19. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy.
21NA1242021-07-06. Service bulletin. ELECTRICAL SYSTEM. This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.
20NA1322021-05-03. Service bulletin. ELECTRICAL SYSTEM. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements.
N2023079902021-04-26. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN; LANE DEPARTURE. Customer Satisfaction program - certain vehicles may have a condition related to the high voltage battery which could gradually lose the ability to maintain voltage. If battery concerns are not addressed, the vehicle could enter a reduced propulsion mode while driving, or lose propulsion, or it may not start. Dealers are to update the Hybrid Powertrain Control Module 2 (HPCM2). This software update is intended to increase the amount of warning time provided.
150603002H2021-04-16. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. 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.
17-NA-3412021-04-16. Service bulletin. ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:CABLE/CORD:ONBOARD. 120V Portable Charge Cord is Inoperative or Charges Vehicle Intermittently Condition Some customers may comment that the 120V portable charge cord does not work or that the vehicle does not charge completely or may charge intermittently. Cause The cause of the condition may be the customer’s power outlet is faulty. Correction Test the 120V Portable Charge Cord.
070849020M2021-04-16. Service bulletin. ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER:SENSOR/SENDING UNIT; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. IPC Odometer Programming Method Quick Reference Guide
17-NA-3372021-04-15. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. All or Some Options May Be Missing from Driver Information Center (DIC) “Info Pages” Menu Due to Them Not Being Selected Condition Some customers may comment that with the “Info” option selected from the main menu (1), the “Info Pages” are blank (2) when scrolling up and down. If information is present when scrolling up and down, they may also comment that certain items are missing when compared to other like vehicles Cause This condition may be caused when all/some of the options not being selected in the “active info pages” menu. Correction If this concern is encountered, determine if all/any of the selections in the “active info pages” menu are not selected. To do this, follow the steps listed below.
N2023079902021-03-22. Service bulletin. ELECTRICAL SYSTEM; LANE DEPARTURE. Customer Satisfaction program - certain vehicles may have a condition related to the high voltage battery which could gradually lose the ability to maintain voltage. If battery concerns are not addressed, the vehicle could enter a reduced propulsion mode while driving, or lose propulsion, or it may not start. Dealers are to update the Hybrid Powertrain Control Module 2 (HPCM2). This software update is intended to increase the amount of warning time provided.
16NA0192021-02-01. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
1308116001F2020-12-07. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION. The intent of this technical bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.