Get Back to Towing Safely and Confidently
Seeing the dreaded “Service Trailer Brake System” message on your dash is more than an annoyance—it’s a critical safety warning that puts your truck, your trailer, and your payload at risk. When your GM HD truck can’t properly control your trailer’s brakes, every trip becomes a liability. This pre-programmed Trailer Brake Control Module (TBCM) is the definitive solution to restore full, factory-spec braking power, giving you the peace of mind you need to haul heavy loads with absolute confidence.
Common Symptoms & Your Solution
If you’re experiencing any of the issues below, a failing TBCM is the most likely culprit. This module is the direct-fit, pre-programmed fix you need to get back on the road without a costly and time-consuming trip to the dealership. We program the module to your truck’s specific VIN before it ships, making installation a true plug-and-play process.
- “Service Trailer Brake System” warning light on the instrument cluster
- Trailer brakes not engaging or engaging erratically
- No output reading on the integrated brake controller display
- Diagnostic Trouble Codes (DTCs) such as C0561, C1112, or U0100
By replacing your old unit with this professionally programmed 2013-2014 Silverado 3500 Trailer Brake Control Module, you’re not just clearing a code; you’re restoring a vital safety system to perfect working order.
Features & Tangible Benefits
- ✔ VIN-Programmed for Your Truck: We flash the module with the latest GM software using your vehicle’s VIN. This eliminates the need for dealer programming, saving you hundreds of dollars and significant downtime.
- ✔ Restores Full Towing Functionality: Get precise, reliable control over your trailer’s brakes for safer stops and better handling, especially with heavy loads.
- ✔ Direct-Fit OEM Compatibility: Engineered to replace original part numbers 20964299 and 20850923, ensuring a perfect fit and seamless integration with your truck’s wiring harness.
- ✔ Durable Construction: Built to withstand the harsh under-frame environment, providing long-lasting, dependable performance you can count on for years of heavy hauling.
- ✔ This unit is backed by our one-year replacement warranty. Enjoy the confidence that comes with a protected purchase and dedicated support.
Expert Insight: From the Mechanic’s Bay
As a technician, I’ve seen dozens of these frame-mounted TBCMs fail. Their location exposes them to water, road salt, and debris, which eventually compromises the internal circuitry. The biggest headache for owners and independent shops has always been the required dealership programming. This VIN-programmed 2013-2014 Silverado 3500 Trailer Brake Control Module completely changes the game. It turns a complicated, dealer-dependent repair into a straightforward job you can do in your own driveway. It’s the smartest, most efficient way to solve this common GM truck issue.
Vehicle Fitment
This module is a guaranteed fit for the following vehicles:
- 2013-2014 Chevrolet Silverado 2500/3500 Pickup
- 2013-2014 GMC Sierra 2500/3500 Pickup
- 2013-2014 GMC Sierra Denali 2500/3500
- 2013 Chevrolet Suburban 2500
- 2013 GMC Yukon XL 2500
After purchasing, simply provide us with your vehicle’s VIN, and we’ll handle the programming. This ensures the 2013-2014 Silverado 3500 Trailer Brake Control Module arrives at your door ready for immediate installation.
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, you can send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive this information, as the programming is essential for the part to function in your truck.
Is this part truly plug-and-play?
Yes. Because we program the module to your specific VIN before shipping, it will communicate correctly with your truck’s other systems right out of the box. Simply disconnect the old module, install the new one, and you’re ready to go. No dealer visit is required.
Where is this module located on my truck?
On most Silverado and Sierra pickups, the TBCM is located on the driver’s side frame rail, towards the rear of the truck. On the Suburban 2500 and Yukon XL 2500, it’s typically found on the driver’s side frame rail, near the middle of the vehicle. Always check your specific vehicle before beginning installation.
Will this fix the “Service Trailer Brake System” message?
In the vast majority of cases, a faulty TBCM is the direct cause of this warning message. Replacing it with our pre-programmed unit is the correct and most effective solution to resolve the error and restore system functionality.
My original part number is 20850923. Will this work?
Yes, this module is a direct replacement for both 20964299 and 20850923. It is the correct, updated component for your vehicle.