Get Back to Safe and Confident Towing
Seeing the dreaded “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, an RV, or a trailer full of materials, you depend on your truck’s integrated braking system to work flawlessly. A faulty Trailer Brake Control Module (TBCM) compromises that safety, leading to unpredictable or non-existent trailer braking. This pre-programmed module is the definitive solution to restore the reliable performance you need to haul with complete peace of mind.
Common Symptoms & Your Direct-Fit Solution
If you’re experiencing issues like the trailer brake warning light, intermittent connection messages, or the trailer brakes simply not engaging when you press the pedal, your TBCM has likely failed. This is a common issue on these hard-working trucks, often accompanied by Diagnostic Trouble Codes (DTCs) such as C1510, C1511, or C152A. Our replacement Silverado Sierra trailer brake control module is engineered to solve these problems permanently. We take the guesswork and hassle out of the repair by pre-flashing the unit with the latest official GM software, programmed specifically to your truck’s unique Vehicle Identification Number (VIN). This means no expensive trips to the dealership for programming—it arrives ready for a straightforward installation.
- ✔ Programmed to Your VIN: This module arrives ready to install right out of the box. No dealer visit is required, saving you significant time and money.
- ✔ Latest GM Software Updates: We flash each unit with the most current software, ensuring optimal performance, compatibility, and communication with your truck’s systems.
- ✔ Restores Full Functionality: Eliminate warning lights and restore the powerful, predictable trailer braking performance you rely on for safe hauling.
- ✔ Direct-Fit Replacement: Engineered to match the original part numbers 20850923, 25854535, 25788981, and 25907533 for a perfect fit and seamless integration.
- ✔ Built for Durability: Designed to withstand the harsh conditions under your truck, resisting moisture and vibration for long-term reliability.
- ✔ Peace of Mind Guarantee: This unit is backed by our one-year replacement warranty.
From the Shop Floor: The Importance of a Working TBCM
We’ve seen it all too often: a customer comes in after a close call on the highway. A sudden stop, a heavy load, and trailer brakes that didn’t respond as they should. The factory Silverado Sierra trailer brake control module is a sophisticated piece of equipment, but it’s also mounted on the frame rail, exposed to years of road salt, water, and vibration. When it fails, it’s not a gradual decline; it’s an immediate loss of a critical safety system. Installing a properly programmed, reliable replacement isn’t just about clearing a light on the dash—it’s about ensuring you have the stopping power you need, exactly when you need it most.
Don’t risk your safety or the integrity of your valuable truck and trailer. This is the correct, professionally prepared Silverado Sierra trailer brake control module that will get your rig back to 100% capability. Simply provide your VIN after purchase, and we’ll handle the programming, so you can handle the installation with confidence.
Frequently Asked Questions
Do I need to take this part to the dealership for programming?
Absolutely not. The main benefit of our service is that we program the module to your truck’s specific VIN before we ship it. This makes it a true plug-and-play solution, saving you the time, hassle, and high cost of a dealership visit.
How do I provide 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 receive this information, as the programming is essential for it to function in your vehicle.
Is this module compatible with my truck?
This part is a direct replacement for 2007-2009 Sierra 2500/3500, Silverado 2500/3500, and 2008-2009 Silverado/Sierra 1500 & Sierra Denali models equipped with the factory towing control option. It replaces part numbers 20850923, 25854535, 25788981, and 25907533.
Where is this module located on my truck?
The Trailer Brake Control Module is typically located on the driver’s side (LH) frame rail, towards the rear of the vehicle, often near the spare tire. It’s a black box with an electrical connector attached.
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 bolts securing the module to the frame. Be sure to disconnect the vehicle’s battery before unplugging the old module to prevent any electrical issues.
What if the ‘Service Trailer Brake’ light stays on after installation?
Since the module is pre-programmed, the light should go out upon installation. If it remains, double-check that the electrical connector is fully seated and clean. In rare cases, the issue may lie with the wiring harness or the in-dash controller switch, which should be inspected by a qualified technician.