# 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.

- Type: Service bulletin
- NHTSA id: 11002020
- Published by NHTSA: 2024\-06\-24
- Manufacturer's number: 23\-NA\-149
- Manufacturer's date: 2024\-06\-07
- NHTSA component: SERVICE 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11002020-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11002020-9999.pdf)

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

## Components

Brakes, Electrical system

## Trouble codes named

C1114

## Vehicles listed

- 2023 CADILLAC ESCALADE
- 2023 CADILLAC ESCALADE ESV
- 2023 CHEVROLET COLORADO
- 2024 CHEVROLET SILVERADO 2500
- 2024 CHEVROLET SILVERADO 3500
- 2023 CHEVROLET SILVERADO 4500
- 2023 CHEVROLET SILVERADO 5500
- 2024 CHEVROLET SILVERADO EV
- 2023 CHEVROLET SUBURBAN 1500
- 2023 CHEVROLET TAHOE
- 2023 GMC CANYON
- 2024 GMC HUMMER EV PICKUP
- 2024 GMC SIERRA 2500
- 2024 GMC SIERRA 3500
- 2023 GMC YUKON
- 2023 GMC YUKON XL

## Recalls for the same vehicles and component

- [25V390000](/recalls/nhtsa/25V390000.md), 2025-06-12: SERVICE BRAKES, HYDRAULIC:BRAKE FLUID LOW WARNING:SWITCH/SENSOR/FLOAT
- [24V674000](/recalls/nhtsa/24V674000.md), 2024-09-12: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:ELECTRIC:CONTROL MODULE:SOFTWARE; SERVICE BRAKES, HYDRAULIC:BRAKE FLUID LOW WARNING: LAMP
- [24V320000](/recalls/nhtsa/24V320000.md), 2024-05-09: ELECTRICAL SYSTEM:PROPULSION SYSTEM; ELECTRICAL SYSTEM:WIRING
- [2024114](/recalls/tc/2024114.md), 2024-02-22: Brakes
- [24V133000](/recalls/nhtsa/24V133000.md), 2024-02-22: ELECTRICAL SYSTEM:ADAS:DRIVER MONITORING:CAMERA/SENSOR; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

## 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.
- [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.
- [N252521980\-01](/bulletins/11024688.md), 2025-10-31, Service campaign: SERVICE BRAKES. 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\-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\-235](/bulletins/11024497.md), 2025-10-27, Service bulletin: ELECTRICAL SYSTEM; STEERING. This technical bulletin provides a procedure to correct the condition of Steering Column Rattle and Turn Signal Over Cancels.
- [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.
- [24\-NA\-170](/bulletins/11024494.md), 2025-10-27, Service bulletin: ENGINE; VISIBILITY/WIPER; ELECTRICAL SYSTEM. This service bulletin provides repair information to correct a customer concern of Check Engine Lamp Illuminated with HVAC Related DTC.

JSON: [/v1/bulletins/11002020](/v1/bulletins/11002020)

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