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Service bulletin 23-NA-149

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 id11002020
Published by NHTSA2024-06-24
Manufacturer's number23-NA-149
Manufacturer's date2024-06-07
NHTSA componentSERVICE BRAKES; ELECTRICAL SYSTEM

NHTSA's summary

This technical bulletin provides a procedure to correct the condition of Trailer Brake Disabled and/or DTC C1114 Stored During Pulling a Trailer with a Battery, Generator or Solar Charger.

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

Brakes, Electrical system

Trouble codes named

C1114

Vehicles listed
CADILLAC ESCALADE2023
CADILLAC ESCALADE ESV2023
CHEVROLET COLORADO2023
CHEVROLET SILVERADO 25002024 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002024 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 45002023 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 55002023 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO EV2024 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN 15002023 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET TAHOE2023
GMC CANYON2023
GMC HUMMER EV PICKUP2024
GMC SIERRA 25002024 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 35002024 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON2023
GMC YUKON XL2023

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

Recalls for the same vehicles and component
25V3900002025-06-12. SERVICE BRAKES, HYDRAULIC:BRAKE FLUID LOW WARNING:SWITCH/SENSOR/FLOAT
24V6740002024-09-12. SERVICE BRAKES, HYDRAULIC:POWER ASSIST:ELECTRIC:CONTROL MODULE:SOFTWARE; SERVICE BRAKES, HYDRAULIC:BRAKE FLUID LOW WARNING: LAMP
24V3200002024-05-09. ELECTRICAL SYSTEM:PROPULSION SYSTEM; ELECTRICAL SYSTEM:WIRING
20241142024-02-22. Brakes
24V1330002024-02-22. ELECTRICAL SYSTEM:ADAS:DRIVER MONITORING:CAMERA/SENSOR; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
N2525140012026-10-05. Service campaign. 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.
N2525290802026-04-01. Service campaign. 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.
N2525155902026-01-27. Service campaign. 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.
N252521980-012025-10-31. Service campaign. Certain vehicles listed above, may have a condition in which the Brake System Control Module does not have the latest software. Dealers are to reprogram the Brake System Control Module.
25-NA-1192025-10-27. Service bulletin. This service bulletin provides information on the Service Safety Restraint Message displayed on the DIC Airbag malfunction indicator illuminated.
25-NA-1082025-10-27. Service bulletin. 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-0442025-10-27. Service bulletin. This service bulletin provides information for dealers/technicians on SPS2 Hybrid/EV Battery Data Retrieval for Service High Voltage DTCs.
24-NA-2352025-10-27. Service bulletin. This technical bulletin provides a procedure to correct the condition of Steering Column Rattle and Turn Signal Over Cancels.
24-NA-2022025-10-27. Service bulletin. This service bulletin provides dealers with Warranty Administration information on North American Charging Standard (NACS) DC Adapter Warranty Claim Information.
24-NA-1702025-10-27. Service bulletin. This service bulletin provides repair information to correct a customer concern of Check Engine Lamp Illuminated with HVAC Related DTC.