Regain Complete Control and Tow with Confidence
When you’re hauling a heavy load, the last thing you need to see is the “Service Trailer Brake System” message flashing on your dash. This warning isn’t just an annoyance; it’s a critical alert that the communication link to your trailer’s brakes is compromised. This VIN-programmed Trailer Brake Control Module (TBCM) is the definitive, professional-grade solution to restore this vital safety system on your GM HD truck or SUV. We program the module specifically to your vehicle’s VIN before it ships, ensuring it integrates seamlessly with your truck’s existing systems for a true plug-and-play installation.
Common Symptoms & Your Definitive Solution
A failing TBCM can manifest in several ways, all of which compromise your safety and towing capability. If you’re experiencing any of the following, this module is the solution you need:
- Persistent “Service Trailer Brake System” message on the Driver Information Center (DIC).
- “Trailer Connected” or “Trailer Disconnected” messages appearing randomly.
- The trailer brakes failing to engage or engaging erratically.
- Diagnostic Trouble Codes (DTCs) related to the trailer brake control circuit.
Don’t settle for a temporary fix or risk an expensive and time-consuming trip to the dealership. This module is the reliable repair that gets you back on the road with the full, safe towing power your truck was designed for. As the trusted source for a reliable 2013-2014 GM Trailer Brake Control Module 20964299, we ensure every unit is ready for immediate installation.
Features & 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 time and money.
- ✔ True Plug-and-Play Installation: Once it arrives, simply locate your old module on the driver’s side frame rail, unplug it, and install this one. No special tools or calibration required.
- ✔ Restores Critical Safety Function: Regain precise, reliable control over your trailer’s brakes for confident handling on steep grades, in heavy traffic, and during emergency stops.
- ✔ Clears Dashboard Warnings: This direct-fit replacement permanently resolves the electronic faults that trigger the “Service Trailer Brake System” message.
- ✔ Direct OE-Specification Replacement: Engineered to meet or exceed original equipment standards for part numbers 20964299 and 20850923, guaranteeing perfect fitment and function.
- ✔ Backed by Our Warranty: This unit is backed by our one-year replacement warranty. You can install it with confidence knowing you’re protected.
Expert Insight: More Than Just a Warning Light
As a seasoned technician, I’ve seen firsthand what happens when a TBCM fails. It’s not just about an annoying light. This module is the brain that translates your foot pressure on the brake pedal into a proportional braking force at the trailer’s wheels. When it fails, you effectively lose that synchronized braking. On a downhill slope with a 12,000-pound trailer, that can lead to brake fade on the truck, trailer sway, or worse. Our programming process for the 2013-2014 GM Trailer Brake Control Module 20964299 ensures it communicates perfectly with your truck’s Body Control Module (BCM) and ABS system, restoring that critical synchronization for maximum safety.
Frequently Asked Questions
Do I need to take this to a dealer for programming?
Absolutely not. We handle all the programming here before we ship the part to you. All we need is your vehicle’s 17-digit VIN. It will arrive ready to install right out of the box.
Where is this module located on my truck?
The module is mounted on the driver’s side frame rail. On Silverado and Sierra pickups, it’s typically on the left-hand rear of the frame. On Suburban 2500 and Yukon XL 2500 models, it’s located on the left-hand middle of the frame.
Will this fix the “Service Trailer Brake System” message?
Yes. A faulty Trailer Brake Control Module is the most common cause for this specific warning message on 2013-2014 GM HD trucks and SUVs. Replacing it with our pre-programmed unit is the definitive solution.
What information do you need from me after I order?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). This allows us to flash the module with the correct software for your truck’s specific configuration.
Is this compatible with part number 20850923?
Yes, this module is a direct, cross-compatible replacement for both GM part numbers 2013-2014 GM Trailer Brake Control Module 20964299 and 20850923. It will function identically.