Restore Full Electrical Function to Your GM Truck
Are you battling frustrating electrical issues in your GMC Sierra or Chevrolet Silverado? Flickering lights, unresponsive power windows, a malfunctioning security system, or a dead HVAC system are classic signs of a failing Body Control Module (BCM). This vital component acts as the central nervous system for your vehicle’s body electronics. When it fails, it can cause a cascade of confusing and seemingly unrelated problems. This genuine OEM-quality replacement BCM, part number 25823559, is the definitive solution, pre-programmed to your vehicle’s specific VIN for a true plug-and-play installation.
From the Diagnostic Bay
We had a 2010 Silverado 2500 in the shop that was driving the owner crazy. The radio would turn on by itself, the dome lights wouldn’t turn off, and the power locks worked intermittently. He’d already replaced the battery twice, thinking it was a power drain issue. After hooking up the scanner, we saw a dozen communication codes all pointing back to the BCM. A quick swap with a VIN-programmed module like this one, and every single issue was resolved in under 10 minutes. It’s not always the battery; sometimes the vehicle’s brain just needs a fresh start.
Symptoms of a Failing Sierra 3500 Body Control Module
- ✔ Power windows, door locks, or mirrors not working or operating erratically.
- ✔ Interior or exterior lights staying on, flickering, or not turning on at all.
- ✔ HVAC and climate control functions are unresponsive or the blower motor works intermittently.
- ✔ The vehicle’s security system malfunctions, preventing the truck from starting (Passlock issues).
- ✔ Airbag warning light is illuminated on the dash, often with DTC B1001.
- ✔ Unexplained battery drain that kills the battery overnight.
- ✔ Multiple diagnostic trouble codes (DTCs) related to body, security, or communication systems.
The Plug-and-Play Advantage: VIN Programming Included
Don’t waste time and money on a trip to the dealership for expensive programming. We handle the complex part for you. Before shipping, we program this module with your truck’s exact VIN and the latest GM software updates. This ensures that all existing features and options on your vehicle will work correctly right out of the box. This process eliminates compatibility conflicts and allows the new BCM to communicate seamlessly with your truck’s other modules, like the ECM and TCM.
Installation and Post-Install Notes
Replacing the Sierra 3500 Body Control Module is a straightforward job for a DIYer or professional technician. The module is typically located under the driver’s side dashboard, near the steering column. The physical swap takes only a few minutes. However, please be aware of potential post-installation procedures:
- Airbag System Sync: If the airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed using a professional-grade scan tool. This re-establishes communication between the BCM and the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure proper brake light and traction control operation.
This module is a direct replacement for a wide range of GM part numbers, including 25844480, 25835966, 15943678, 20939137, 22860591, and more, ensuring broad compatibility across the GMT900 platform (Silverado, Sierra, Tahoe, Yukon, Suburban, Escalade).
Frequently Asked Questions
What does VIN programming mean for me?
It means this module arrives ready for installation without needing any additional programming from a dealership. We configure it to your vehicle’s specific options using your VIN, making the process as simple as swapping the part.
Is this a direct replacement for my Sierra 3500 Body Control Module?
Yes, this is an OEM-quality, direct-fit replacement for 2007-2011 GMC Sierra 3500 models and is also compatible with a wide range of other GM trucks and SUVs from that era. It interchanges with numerous part numbers to ensure a perfect fit.
What tools are required for installation?
Basic hand tools, typically a 7mm and/or 10mm socket, are all that’s needed for the physical installation. In some cases, a professional scan tool may be required for post-installation procedures like the airbag system sync.
My airbag light is on after installing the new BCM. What should I do?
This is a common security feature. You will need a qualified mechanic with a high-level scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with your vehicle’s airbag module.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without any hassle or need to return it.