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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 id10243754
Published by NHTSA2023-10-10
Manufacturer's number23-NA-149
Manufacturer's date2023-09-15
NHTSA componentEQUIPMENT; SERVICE BRAKES

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, Equipment and accessories

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 SUBURBAN2023
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 HUMMER EV SUV2024
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
GMC YUKON XL 15002023 (the catalog's model; the bulletin names a series or trim of it)

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
20241142024-02-22. Brakes

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
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.
N2525219802025-10-22. Service campaign. Certain vehicles, 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.
23-NA-2012025-10-21. Service bulletin. This service bulletin advises the technician of a possible loose ground that may be causing customer concerns of Loss of Steering Assist and/or Loss of Brake Assist and Malfunction Indicator Lamp (MIL) Illuminated.
25-NA-0652025-04-24. Service bulletin. This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
25-NA-0642025-04-17. Service bulletin. This informational bulletin provides information on the brake system warning lamp illuminated on driver information center (DIC), brake pedal goes closer to the floor and/or is harder to push.
PIT6347A2025-03-17. Service bulletin. This Preliminary information communicates an issue with ABS SES MIL / Service Brake System / Service StabiliTrak / BSCM DTC P0606 P0562 and dealers to perform additional battery and connection testing.
PIT63472025-03-02. Service bulletin. This Preliminary information communicates an issue with ABS SES MIL / Service Brake System / Service StabiliTrak / BSCM DTC P0606 P0562 and engineering is currently investigating.
24-NA-0482025-02-17. Service bulletin. This service bulletin provides customer information for rear unwanted automatic braking, usually when reversing out of a garage or driveway.
21-NA-0432025-02-12. Service bulletin. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
25-NA-0192025-02-11. Service bulletin. This bulletin advises the tech to check other areas that may need repair before replacing the wheel speed sensor.