# Service campaign N252529080

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 campaign
- NHTSA id: 11030439
- Published by NHTSA: 2026\-04\-01
- Manufacturer's number: N252529080
- Manufacturer's date: 2026\-04\-01
- Campaign id or software version: N252529080
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030439-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030439-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2023 to 2024 BRIGHTDROP 600 ELCV
- 2024 BRIGHTDROP ZEVO 400
- 2025 to 2026 CADILLAC ESCALADE IQ
- 2026 CADILLAC ESCALADE IQL
- 2025 CHEVROLET BRIGHTDROP 400
- 2025 CHEVROLET BRIGHTDROP 600
- 2024 to 2026 CHEVROLET SILVERADO EV
- 2024 to 2026 GMC HUMMER EV PICKUP
- 2024 to 2026 GMC HUMMER EV SUV
- 2024 to 2026 GMC SIERRA EV

## Recalls for the same vehicles and component

- [26V494000](/recalls/nhtsa/26V494000.md), 2026-07-30: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [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

## 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.
- [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.
- [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.
- [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.
- [25\-NA\-119](/bulletins/11024500.md), 2025-10-27, Service bulletin: AIR BAGS; ELECTRICAL SYSTEM. This service bulletin provides information on the Service Safety Restraint Message displayed on the DIC Airbag malfunction indicator illuminated.
- [25\-NA\-108](/bulletins/11024499.md), 2025-10-27, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM. This bulletin provides a procedure to inspect and verify the drive shafts are over extending past the 5mm tolerance, causing the customers concern of a fluid leak under the vehicle.
- [25\-NA\-044](/bulletins/11024498.md), 2025-10-27, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This service bulletin provides information for dealers/technicians on SPS2 Hybrid/EV Battery Data Retrieval for Service High Voltage DTCs.
- [24\-NA\-202](/bulletins/11024496.md), 2025-10-27, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This service bulletin provides dealers with Warranty Administration information on North American Charging Standard \(NACS\) DC Adapter Warranty Claim Information.
- [PIE0839](/bulletins/11024492.md), 2025-10-27, Service bulletin: ELECTRICAL SYSTEM; SEATS. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Inoperative Lumbar and/or Massage Function Message on Driver Information Center \(DIC\).

JSON: [/v1/bulletins/11030439](/v1/bulletins/11030439)

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