Regain Complete Control of Your Towing Power
When you’re hauling a heavy load with your Sierra, Silverado, or Suburban, the last thing you need is a “Service Trailer Brake System” message flashing on your dash. A failing Trailer Brake Control Module (TBCM) isn’t just an annoyance—it’s a critical safety issue that compromises your ability to stop safely. This direct-replacement module is the definitive solution to restore your truck’s integrated trailer braking system to perfect working order, giving you the confidence you need on any road, under any load.
Common Symptoms & Your Solution
If you’re experiencing intermittent or total loss of trailer brake function, or seeing diagnostic trouble codes (DTCs) like C0265, C0267, or C0269, a faulty TBCM is the most likely culprit. Our module is not just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and dealer hassle out of the equation by pre-programming each 2011-2012 GM Trailer Brake Control Module to your vehicle’s specific VIN. This ensures seamless communication with your truck’s other systems and restores the precise, proportional braking control you expect from your heavy-duty vehicle.
- ✔ VIN-Programmed for Your Truck: Arrives flashed with the latest GM software and matched to your vehicle’s VIN. This eliminates the need for an expensive trip to the dealership for programming.
- ✔ Plug-and-Play Installation: Simply locate your old module on the frame rail, swap it with this unit, and you’re ready to tow. No special tools or software required.
- ✔ Restore Critical Safety: Regain full, reliable control over your trailer’s brakes for safer stops and more confident handling, especially on steep grades or in emergency situations.
- ✔ Eliminate Annoying Dash Warnings: Clear the persistent “Service Trailer Brake System” message and restore your dashboard to a clean, error-free state.
- ✔ OEM-Level Performance: Engineered to meet or exceed original equipment specifications for a perfect fit and flawless operation in all compatible 2011-2012 GM HD trucks and SUVs.
- ✔ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
From the Technician’s Bench: The Hidden Danger of a Failing TBCM
“I once had a customer with a 2011 Silverado 3500 who ignored his trailer brake warning for weeks. He was hauling a 12,000-pound excavator when he had to make a hard stop on a downhill grade. The truck’s brakes did their job, but without the trailer brakes assisting, the sheer weight of the trailer tried to push the truck straight through the intersection. It was a terrifying, white-knuckle moment that could have been a disaster. A properly functioning 2011-2012 GM Trailer Brake Control Module isn’t a luxury; it’s the brain that keeps your entire rig working as one cohesive, safe unit. This pre-programmed module ensures that link is solid, reliable, and ready for the toughest jobs.”
Frequently Asked Questions
How does the VIN programming process work?
After you place your order, you will need to provide us with your 17-digit Vehicle Identification Number (VIN). Our technicians will use this number to load the correct, vehicle-specific software and calibrations from GM’s database onto the module before it is shipped to you.
Is any additional programming needed after installation?
No. Because we pre-program the module to your VIN, it is a true plug-and-play installation. Once installed, your vehicle will recognize it immediately, and it will be ready for use without any further steps or dealer visits.
Where is this module located on the vehicle?
On the 2011-2012 Silverado and Sierra pickups, the TBCM is typically located on the driver’s side frame rail, towards the rear of the truck. On the Suburban 2500 and Yukon XL 2500, it is usually found on the driver’s side frame rail, near the middle of the vehicle.
Will this fit my truck if my original part number is different?
Yes, this module, part number 20791897, is the correct and updated replacement for several earlier part numbers for the listed vehicles. As long as your truck is a 2011-2012 Sierra/Silverado 2500/3500, Suburban 2500, or Yukon XL 2500, this is the correct part.
Why is a pre-programmed module better than a used one?
A used module from a salvage yard is programmed to a different vehicle and will not work correctly in your truck without being reprogrammed by a dealer. Our new, pre-programmed 2011-2012 GM Trailer Brake Control Module ensures you get a fully updated, correctly calibrated part that works right out of the box.