# Service bulletin 23\-NA\-202

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.

- Type: Service bulletin
- NHTSA id: 11024487
- Published by NHTSA: 2025\-10\-25
- Manufacturer's number: 23\-NA\-202
- Manufacturer's date: 2025\-05\-14
- NHTSA component: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM

## NHTSA's summary

This service bulletin provides information on High Voltage Drive Motor Battery \- TAC Approval and Exchange Program for BrightDrop, Chevrolet Silverado EV, and GMC Sierra EV, HUMMER EV/SUV.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11024487-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11024487-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Fuel system

## Vehicles listed

- 2022 BRIGHTDROP EV600
- 2024 BRIGHTDROP ZEVO 400
- 2023 to 2024 BRIGHTDROP ZEVO 600
- 2025 CADILLAC ESCALADE IQ
- 2025 CHEVROLET BRIGHTDROP 400
- 2025 CHEVROLET BRIGHTDROP 600
- 2024 to 2025 CHEVROLET SILVERADO EV
- 2022 to 2025 GMC HUMMER EV PICKUP
- 2024 to 2025 GMC HUMMER EV SUV
- 2024 to 2025 GMC SIERRA EV

## Recalls for the same vehicles and component

- [26V494000](/recalls/nhtsa/26V494000.md), 2026-07-30: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [26V129000](/recalls/nhtsa/26V129000.md), 2026-03-05: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP:CONTROL/DRIVE MODULE
- [24V937000](/recalls/nhtsa/24V937000.md), 2024-12-18: FORWARD COLLISION AVOIDANCE: WARNINGS:EXTERNAL/PEDESTRIAN ALERT; ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM
- [24V320000](/recalls/nhtsa/24V320000.md), 2024-05-09: ELECTRICAL SYSTEM:PROPULSION SYSTEM; ELECTRICAL SYSTEM:WIRING
- [23V367000](/recalls/nhtsa/23V367000.md), 2023-05-25: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [22V771000](/recalls/nhtsa/22V771000.md), 2022-10-13: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY

## Other bulletins for the same vehicles and component

- [N252514001](/bulletins/11037980.md), 2026-10-05, Service campaign: ELECTRICAL SYSTEM. Service Update. Certain vehicles listed above may enable the new King Crab Feature through OTA programming or programming at the dealer. Dealers will perform a comprehensive software update. Owners who have accepted applicable terms and conditions will have the opportunity to accept these software changes using wireless over\-the\-air \(OTA\) technology without having to bring their vehicle to a dealership. Alternatively, owners may have their vehicle serviced at a GM dealer to receive these software updates.
- [N242452131\-02](/bulletins/11037312.md), 2026-09-15, Emissions: FUEL/PROPULSION SYSTEM. Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain 2023\-2024 model year Chevrolet Colorado / Silverado 1500 and GMC Canyon / Sierra 1500 vehicles equipped with a 2.7L engine \(RPO L3B\). The Engine Control Module \(ECM\) may not sufficiently control fuel injector flow rate under certain driving conditions. Dealers are to reprogram the ECM.
- [N242452130\-01](/bulletins/11035685.md), 2026-08-04, Service campaign: FUEL/PROPULSION SYSTEM. Certain vehicles may have a condition in which the Engine Control Module \(ECM\) does not sufficiently control fuel injector flow rate under certain driving conditions. Dealers are to reprogram the ECM.
- [N252529080](/bulletins/11030439.md), 2026-04-01, Service campaign: ELECTRICAL SYSTEM. Service Update. Certain vehicles listed above may be missing a high voltage header plug on the RESS battery pack drive motor connector. Dealers are to inspect the RESS pack connectors and install the proper HV Header Plug if missing.
- [N252515590](/bulletins/11027795.md), 2026-01-27, Service campaign: ELECTRICAL SYSTEM. Certain vehicles listed above, may have a condition in which the body\-to\-chassis ground strap may be corroded. Dealers will replace the ground strap.
- [25\-NA\-153](/bulletins/11026102.md), 2025-12-04, Service bulletin: ELECTRICAL SYSTEM; EXTERIOR LIGHTING. This informational bulletin provides Information on Rear Upper Body Structure Auxiliary Lamp Will Not Turn ON.
- [N242438500\-04](/bulletins/11025665.md), 2025-11-24, Emissions: FUEL/PROPULSION SYSTEM. Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain 2024 Model Year Chevrolet Silverado and GMC Sierra vehicles with a 6.6L diesel engine. The Engine Control Module \(ECM\) may not properly diagnose, may not set Diagnostic Trouble Codes \(DTCs\), or may not illuminate the Malfunction Indicator Light \(Check Engine Light\) if certain fault conditions of the Selective Catalyst Reduction \(SCR or NOx\) catalyst occur. Dealers are to reprogram the ECM and TCM.
- [25\-NA\-131](/bulletins/11024952.md), 2025-11-05, Service bulletin: SEATS; ELECTRICAL SYSTEM. This Service bulletin provides information on the heated seats warming up when the vehicle is started but soon cooling off and the heated seat LED indicator remaining illuminated may be due to the BCM software calibration.
- [N252526150](/bulletins/11024873.md), 2025-11-04, Service campaign: FUEL/PROPULSION SYSTEM. Service Update. Certain vehicles listed above may have a condition which can cause the fuel pump power control module to fail. If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module.
- [25\-NA\-121](/bulletins/11024501.md), 2025-10-27, Service bulletin: ELECTRICAL SYSTEM. This service bulletin provides information on the radio software related issues to update the radio to the latest software version Y177.

JSON: [/v1/bulletins/11024487](/v1/bulletins/11024487)

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