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 ID | 23-NA-149 |
| Manufacturer | CADILLAC |
| Models | 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 |
| Model Years | 2023–2024 |
| Date Issued | September 15, 2023 |
| Date Added to NHTSA | February 23, 2024 |
| Component | BRAKES (PWS) |
| Vehicles Affected | 114 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
| Make | Model | Year | Component |
|---|---|---|---|
| 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
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.