Restore Critical Towing Safety and Clear Annoying Dash Warnings
Seeing the dreaded “Service Trailer Brake System” message on your dash? Experiencing weak or non-existent trailer braking? Don’t risk your safety or the safety of others on the road. A faulty Trailer Brake Control Module (TBCM) is not just an inconvenience—it’s a critical failure that compromises your ability to control a heavy load. This direct-fit module is the definitive solution, arriving at your door fully programmed to your truck’s specific VIN. This eliminates the need for an expensive and time-consuming trip to the dealership for programming. Get back to towing with confidence and control.
Common Symptoms & Your Solution
If you’re dealing with any of the following issues, a failing TBCM is the most likely culprit. This pre-programmed unit is engineered to resolve these problems permanently:
- “Service Trailer Brake System” message on the Driver Information Center (DIC)
- No power output to the trailer’s brakes
- Intermittent or unpredictable trailer braking performance
- Diagnostic Trouble Codes (DTCs) related to the trailer brake system
- Inability to adjust brake gain using the in-cab controller
Installing this professionally programmed 2007-2009 Sierra Silverado Trailer Brake Control Module is the most reliable way to restore your truck’s factory towing function and ensure every haul is a safe one.
Features & Tangible Benefits
- ✔ VIN-Programmed for Your Truck: We flash the module with the latest GM software using your specific VIN. This makes it a true plug-and-play part, saving you hundreds in dealer programming fees.
- ✔ Restored Braking Power: Regain full, proportional control over your trailer’s brakes for smooth, predictable, and safe stops, even with the heaviest loads.
- ✔ Direct OEM-Spec Fit: Engineered to match the original part (compatible with 20850923, 25854535, 25788981, 25907533), ensuring a perfect fit and seamless integration with your truck’s wiring harness. Mounts in the factory location on the left-hand rear frame rail.
- ✔ Eliminate Annoying Alerts: Permanently clear the “Service Trailer Brake System” warning from your dashboard and drive without distractions.
- ✔ Peace of Mind on the Road: This unit is backed by our one-year replacement warranty.
From the Technician’s Bench: I’ve seen drivers put off this repair, thinking it’s just a faulty sensor. Then they hook up a 10,000-pound trailer and head down a steep grade. That’s when they realize the truck’s brakes alone aren’t enough. The feeling of a trailer pushing your truck is terrifying and incredibly dangerous. This isn’t a part you can afford to neglect. Getting a pre-programmed 2007-2009 Sierra Silverado Trailer Brake Control Module isn’t just about fixing a light on the dash; it’s about ensuring you have the stopping power you absolutely need, every single time.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
Absolutely not. The main benefit of our service is that we program the module to your truck’s VIN before we ship it. This means it arrives ready for installation, saving you time and the high cost of dealer programming.
Where is this module located on my 2008 Silverado 2500?
For the 2007-2009 GM HD trucks, the Trailer Brake Control Module is typically mounted on the driver’s side frame rail, towards the rear of the vehicle, near the spare tire.
How do I provide you with my VIN?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we have this information to complete the programming.
Will this fix the “Service Trailer Brake System” message on my dash?
Yes, in the vast majority of cases, a failed TBCM is the direct cause of this specific warning message. Replacing it with this pre-programmed unit is the correct and reliable fix.
Is this part compatible with a 2009 GMC Sierra 1500 with a towing package?
Yes, this module is compatible with the 2008-2009 Sierra 1500, Sierra Denali, and Silverado 1500 models equipped with the towing control option, in addition to the 2500 and 3500 models from 2007-2009.