# 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: 10243754
- Published by NHTSA: 2023\-10\-10
- Manufacturer's number: 23\-NA\-149
- Manufacturer's date: 2023\-09\-15
- NHTSA component: EQUIPMENT; 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10243754-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10243754-9999.pdf)

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

## Components

Brakes, Equipment and accessories

## 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
- 2023 CHEVROLET SUBURBAN 1500
- 2023 CHEVROLET TAHOE
- 2023 GMC CANYON
- 2024 GMC HUMMER EV PICKUP
- 2024 GMC HUMMER EV SUV
- 2024 GMC SIERRA 2500
- 2024 GMC SIERRA 3500
- 2023 GMC YUKON
- 2023 GMC YUKON XL
- 2023 GMC YUKON XL 1500

## 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
- [2024114](/recalls/tc/2024114.md), 2024-02-22: Brakes

## Other bulletins for the same vehicles and component

- [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.
- [N252521980](/bulletins/11024420.md), 2025-10-22, Service campaign: SERVICE BRAKES. 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\-201](/bulletins/11024378.md), 2025-10-21, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM; STEERING. 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\-065](/bulletins/11017173.md), 2025-04-24, Service bulletin: STEERING; SERVICE BRAKES; FUEL/PROPULSION SYSTEM. This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
- [25\-NA\-064](/bulletins/11017097.md), 2025-04-17, Service bulletin: SERVICE BRAKES. 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.
- [PIT6347A](/bulletins/11015642.md), 2025-03-17, Service bulletin: SERVICE BRAKES. 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.
- [PIT6347](/bulletins/11014624.md), 2025-03-02, Service bulletin: SERVICE BRAKES. 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\-048](/bulletins/11014277.md), 2025-02-17, Service bulletin: FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING; SERVICE BRAKES. This service bulletin provides customer information for rear unwanted automatic braking, usually when reversing out of a garage or driveway.
- [21\-NA\-043](/bulletins/11014230.md), 2025-02-12, Service bulletin: VISIBILITY/WIPER; SERVICE BRAKES; ENGINE; ELECTRICAL SYSTEM; WHEELS. 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\-019](/bulletins/11014138.md), 2025-02-11, Service bulletin: WHEELS; VEHICLE SPEED CONTROL; AIR BAGS; ELECTRICAL SYSTEM; SERVICE BRAKES. This bulletin advises the tech to check other areas that may need repair before replacing the wheel speed sensor.

JSON: [/v1/bulletins/10243754](/v1/bulletins/10243754)

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