Restore Critical Towing Safety and Clear That Annoying Dash Light
Seeing the “Service Trailer Brake System” message on your dash is more than an annoyance—it’s a critical safety warning. When you’re hauling heavy equipment, a fifth-wheel, or a work trailer, you need absolute confidence that your trailer brakes will respond instantly. This VIN-programmed Trailer Brake Control Module (TBCM) is the definitive solution to restore that confidence and get you back on the road safely, without a mandatory trip to the dealership.
Common Symptoms & Your Definitive Solution
If you’re experiencing issues with your towing system, a faulty TBCM is the most likely culprit. Don’t ignore these warning signs:
- “Service Trailer Brake System” message on the Driver Information Center (DIC)
- Trailer brakes failing to engage or engaging erratically
- “Trailer Connected” or “Trailer Disconnected” messages flickering
- Diagnostic Trouble Codes (DTCs) such as C1512, C1522, or U0121
This module is the direct-fit, reliable fix for these problems. We take the guesswork and hassle out of the repair by pre-programming it specifically to your truck’s VIN. When it arrives, it’s ready for a straightforward, plug-and-play installation, restoring your truck’s towing capabilities to factory-perfect condition. This is the professional-grade fix for the serious truck owner who values both safety and efficiency.
Features & Benefits
- ✔ VIN-Programmed for Your Truck: Arrives ready to install right out of the box, eliminating the need for expensive dealer programming and saving you time and money.
- ✔ Direct OEM Fitment: Engineered to match the original factory part for a perfect fit and seamless integration with your 2013-2014 GM HD truck’s systems.
- ✔ Flashed with Latest GM Updates: We load the newest, most stable software from General Motors to ensure optimal performance and long-term reliability.
- ✔ Restores Full Brake Control: Regain precise, reliable control over your trailer’s brakes for safer stops and confident handling of heavy loads.
- ✔ Clears Dashboard Warnings: Permanently resolves the “Service Trailer Brake System” message caused by a failed original module.
- ✔ One-Year Replacement Warranty: This unit is backed by our one-year replacement warranty for your complete peace of mind.
An Expert’s Note on Towing Safety: We recently had a customer, a contractor named Dave, who was about to haul a mini-excavator 300 miles for a big job. The night before, the dreaded ‘Service Trailer Brake’ light came on in his ’14 Silverado 2500. The dealership couldn’t get him in for a week. He was in a bind. He ordered this module, sent us his VIN, and we shipped it overnight. He installed it himself in under an hour right there in his yard. The light was gone, the brakes tested perfectly, and he made it to the job site on time. That’s what this is about—not just selling a part, but providing a real-world solution that keeps you working and, most importantly, keeps you safe on the road.
Don’t compromise on the safety of your truck, your trailer, and your cargo. This pre-programmed 2013-2014 Silverado Sierra 2500 Trailer Brake Control Module is the most reliable and efficient way to solve your trailer brake issues and tow with complete confidence.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. The main benefit of our service is that this module arrives at your door fully programmed to your vehicle’s specific VIN. It is a true plug-and-play solution, saving you the time, cost, and hassle of a dealership visit.
Where is this module located on my truck?
On the 2013-2014 Sierra and Silverado 2500/3500 pickups, the TBCM is typically located on the driver’s side frame rail, towards the rear of the truck. On the 2013 Suburban 2500 and Yukon XL 2500, it’s usually on the driver’s side frame rail, near the middle of the vehicle.
How do I provide my VIN number?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship the module until we have programmed it, so please provide the VIN promptly to avoid delays.
Will this fix the ‘Service Trailer Brake System’ message?
In the vast majority of cases where this message appears, a faulty Trailer Brake Control Module is the root cause. Replacing it with this pre-programmed unit is the correct and definitive repair for a failed module.
Is this part compatible with part number 20964299?
Yes, this module is a direct, compatible replacement for original part numbers 20850923 and 20964299.
What tools are needed for installation?
Installation is straightforward for someone with basic mechanical skills. You will typically need a socket set to remove the mounting bolts and a tool to disconnect the electrical connectors. No special programming tools are required.