TSB: CADILLAC CANYON, COLORADO, ESCALADE, ESCALADE ESV, HUMMER EV, SIERRA 2500, SIERRA 3500, SILVERADO 2500, SILVERADO 3500, SILVERADO 4500HD, SILVERADO 5500HD, SILVERADO EV, SUBURBAN, SUBURBAN 1500, TAHOE, YUKON, YUKON XL, YUKON XL 1500 (2023–2024)

Bulletin 23-NA-149 — September 15, 2023

Bulletin Details

Bulletin ID23-NA-149
ManufacturerCADILLAC
ModelsCANYON, COLORADO, ESCALADE, ESCALADE ESV, HUMMER EV, SIERRA 2500, SIERRA 3500, SILVERADO 2500, SILVERADO 3500, SILVERADO 4500HD, SILVERADO 5500HD, SILVERADO EV, SUBURBAN, SUBURBAN 1500, TAHOE, YUKON, YUKON XL, YUKON XL 1500
Model Years2023–2024
Date IssuedSeptember 15, 2023
Date Added to NHTSAFebruary 23, 2024
ComponentBRAKES (PWS)
Vehicles Affected114 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

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.

Affected Vehicles

MakeModelYearComponent
GMC HUMMER EV 2024 350000 EQUIPMENT
GMC HUMMER EV 2024 030000 BRAKES (PWS)
GMC HUMMER EV 2024 030000 SERVICE BRAKES, HYDRAULIC
GMC HUMMER EV 2024 110000 ELECTRICAL SYSTEM
GMC HUMMER EV 2024 350000 EQUIPMENT
GMC HUMMER EV 2024 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
GMC SIERRA 2500 2024 350000 EQUIPMENT
GMC SIERRA 2500 2024 030000 BRAKES (PWS)
GMC SIERRA 2500 2024 030000 SERVICE BRAKES, HYDRAULIC
GMC SIERRA 2500 2024 110000 ELECTRICAL SYSTEM
GMC SIERRA 2500 2024 350000 EQUIPMENT
GMC SIERRA 2500 2024 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
GMC SIERRA 3500 2024 350000 EQUIPMENT
GMC SIERRA 3500 2024 030000 BRAKES (PWS)
GMC SIERRA 3500 2024 030000 SERVICE BRAKES, HYDRAULIC
GMC SIERRA 3500 2024 110000 ELECTRICAL SYSTEM
GMC SIERRA 3500 2024 350000 EQUIPMENT
GMC SIERRA 3500 2024 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
CHEVROLET SILVERADO 2500 2024 350000 EQUIPMENT
CHEVROLET SILVERADO 2500 2024 030000 BRAKES (PWS)
CHEVROLET SILVERADO 2500 2024 030000 SERVICE BRAKES, HYDRAULIC
CHEVROLET SILVERADO 2500 2024 110000 ELECTRICAL SYSTEM
CHEVROLET SILVERADO 2500 2024 350000 EQUIPMENT
CHEVROLET SILVERADO 2500 2024 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
CHEVROLET SILVERADO 3500 2024 350000 EQUIPMENT
CHEVROLET SILVERADO 3500 2024 030000 BRAKES (PWS)
CHEVROLET SILVERADO 3500 2024 030000 SERVICE BRAKES, HYDRAULIC
CHEVROLET SILVERADO 3500 2024 110000 ELECTRICAL SYSTEM
CHEVROLET SILVERADO 3500 2024 350000 EQUIPMENT
CHEVROLET SILVERADO 3500 2024 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
CHEVROLET SILVERADO EV 2024 350000 EQUIPMENT
CHEVROLET SILVERADO EV 2024 030000 BRAKES (PWS)
CHEVROLET SILVERADO EV 2024 030000 SERVICE BRAKES, HYDRAULIC
CHEVROLET SILVERADO EV 2024 110000 ELECTRICAL SYSTEM
CHEVROLET SILVERADO EV 2024 350000 EQUIPMENT
CHEVROLET SILVERADO EV 2024 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
GMC CANYON 2023 350000 EQUIPMENT
GMC CANYON 2023 030000 BRAKES (PWS)
GMC CANYON 2023 030000 SERVICE BRAKES, HYDRAULIC
GMC CANYON 2023 110000 ELECTRICAL SYSTEM
GMC CANYON 2023 350000 EQUIPMENT
GMC CANYON 2023 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
CHEVROLET COLORADO 2023 350000 EQUIPMENT
CHEVROLET COLORADO 2023 030000 BRAKES (PWS)
CHEVROLET COLORADO 2023 030000 SERVICE BRAKES, HYDRAULIC
CHEVROLET COLORADO 2023 110000 ELECTRICAL SYSTEM
CHEVROLET COLORADO 2023 350000 EQUIPMENT
CHEVROLET COLORADO 2023 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
CADILLAC ESCALADE 2023 350000 EQUIPMENT
CADILLAC ESCALADE 2023 030000 BRAKES (PWS)
CADILLAC ESCALADE 2023 030000 SERVICE BRAKES, HYDRAULIC
CADILLAC ESCALADE 2023 110000 ELECTRICAL SYSTEM
CADILLAC ESCALADE 2023 350000 EQUIPMENT
CADILLAC ESCALADE 2023 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
CADILLAC ESCALADE ESV 2023 350000 EQUIPMENT
CADILLAC ESCALADE ESV 2023 030000 BRAKES (PWS)
CADILLAC ESCALADE ESV 2023 030000 SERVICE BRAKES, HYDRAULIC
CADILLAC ESCALADE ESV 2023 110000 ELECTRICAL SYSTEM
CADILLAC ESCALADE ESV 2023 350000 EQUIPMENT
CADILLAC ESCALADE ESV 2023 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
CHEVROLET SILVERADO 4500HD 2023 350000 EQUIPMENT
CHEVROLET SILVERADO 4500HD 2023 030000 BRAKES (PWS)
CHEVROLET SILVERADO 4500HD 2023 030000 SERVICE BRAKES, HYDRAULIC
CHEVROLET SILVERADO 4500HD 2023 110000 ELECTRICAL SYSTEM
CHEVROLET SILVERADO 4500HD 2023 350000 EQUIPMENT
CHEVROLET SILVERADO 4500HD 2023 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
CHEVROLET SILVERADO 5500HD 2023 350000 EQUIPMENT
CHEVROLET SILVERADO 5500HD 2023 030000 BRAKES (PWS)
CHEVROLET SILVERADO 5500HD 2023 030000 SERVICE BRAKES, HYDRAULIC
CHEVROLET SILVERADO 5500HD 2023 110000 ELECTRICAL SYSTEM
CHEVROLET SILVERADO 5500HD 2023 350000 EQUIPMENT
CHEVROLET SILVERADO 5500HD 2023 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
CHEVROLET SUBURBAN 2023 350000 EQUIPMENT
CHEVROLET SUBURBAN 2023 030000 BRAKES (PWS)
CHEVROLET SUBURBAN 2023 030000 SERVICE BRAKES, HYDRAULIC
CHEVROLET SUBURBAN 2023 110000 ELECTRICAL SYSTEM
CHEVROLET SUBURBAN 2023 350000 EQUIPMENT
CHEVROLET SUBURBAN 2023 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
CHEVROLET SUBURBAN 1500 2023 350000 EQUIPMENT
CHEVROLET SUBURBAN 1500 2023 030000 BRAKES (PWS)
CHEVROLET SUBURBAN 1500 2023 030000 SERVICE BRAKES, HYDRAULIC
CHEVROLET SUBURBAN 1500 2023 110000 ELECTRICAL SYSTEM
CHEVROLET SUBURBAN 1500 2023 350000 EQUIPMENT
CHEVROLET SUBURBAN 1500 2023 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
CHEVROLET TAHOE 2023 350000 EQUIPMENT
CHEVROLET TAHOE 2023 030000 BRAKES (PWS)
CHEVROLET TAHOE 2023 030000 SERVICE BRAKES, HYDRAULIC
CHEVROLET TAHOE 2023 110000 ELECTRICAL SYSTEM
CHEVROLET TAHOE 2023 350000 EQUIPMENT
CHEVROLET TAHOE 2023 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
GMC YUKON 2023 350000 EQUIPMENT
GMC YUKON 2023 030000 BRAKES (PWS)
GMC YUKON 2023 030000 SERVICE BRAKES, HYDRAULIC
GMC YUKON 2023 110000 ELECTRICAL SYSTEM
GMC YUKON 2023 350000 EQUIPMENT
GMC YUKON 2023 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
GMC YUKON XL 2023 350000 EQUIPMENT
GMC YUKON XL 2023 030000 BRAKES (PWS)
GMC YUKON XL 2023 030000 SERVICE BRAKES, HYDRAULIC
GMC YUKON XL 2023 110000 ELECTRICAL SYSTEM
GMC YUKON XL 2023 350000 EQUIPMENT
GMC YUKON XL 2023 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
GMC YUKON XL 1500 2023 350000 EQUIPMENT
GMC YUKON XL 1500 2023 030000 BRAKES (PWS)
GMC YUKON XL 1500 2023 030000 SERVICE BRAKES, HYDRAULIC
GMC YUKON XL 1500 2023 110000 ELECTRICAL SYSTEM
GMC YUKON XL 1500 2023 350000 EQUIPMENT
GMC YUKON XL 1500 2023 114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL

Related CADILLAC Recalls

CampaignModelYearComponentSummary
CTS 2016 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...
ATS 2015 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...
ESCALADE 2015 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...
SRX 2015 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...
SRX 2016 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized CADILLAC dealer. Bring this bulletin ID (23-NA-149) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.