Restore Full Electrical Function to Your GM Truck or SUV
Are you battling frustrating electrical gremlins in your truck? Flickering lights, unresponsive power windows, or a security system that acts on its own are common signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a cascade of confusing and disruptive issues. This genuine OEM-quality GM Body Control Module, part number 25971916, is the definitive solution for restoring your vehicle’s performance and reliability.
From the Diagnostic Bay
We had a 2009 Silverado in the shop with the strangest symptoms. The radio would turn off, the door locks would cycle randomly, and the HVAC blower was intermittent. The owner had already replaced the battery and checked the alternator. After scanning, we found a dozen communication codes pointing everywhere. The real culprit? A faulty BCM. A quick check of the main ground connection under the driver’s side A-pillar showed it was clean and tight, confirming the module itself was the issue. Installing a VIN-programmed unit like this one solved every single problem in under 10 minutes. Don’t chase ghosts—start with the brain.
Is Your Body Control Module Failing?
A failing BCM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, your BCM is the likely cause:
- ✔ Intermittent or non-working power windows, door locks, or interior/exterior lights.
- ✔ HVAC system malfunctions, such as a blower motor that won’t turn on or stays on constantly.
- ✔ An illuminated airbag warning light, often accompanied by DTC B1001.
- ✔ Security system errors, causing no-start conditions or random alarm activation.
- ✔ Unexplained battery drain while the vehicle is off.
- ✔ Communication errors with other modules on the vehicle’s network.
The Plug-and-Play Solution for Your 2007-2010 Sierra Denali BCM
Forget expensive dealership visits and programming fees. We simplify the repair process by programming this module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures that it integrates seamlessly with your existing systems right out of the box. The module arrives loaded with the latest GM software updates for optimal performance and longevity.
Installation is straightforward for any DIYer or professional technician. The BCM is typically located under the driver’s side dashboard near the steering column. In most cases, the process is as simple as disconnecting the old module and plugging in the new one. While this is a direct-fit replacement, please note that some vehicles may require post-installation procedures. For example, if an airbag light is present, a ‘Setup SDM Primary Key in BCM’ procedure may be needed using a professional scan tool. Similarly, a Brake Pedal Position Relearn might be necessary for certain models.
This module is a direct replacement for a wide range of part numbers, including: 25835966, 15263363, 15943678, 25790508, 25844479, 20939137, 22860591, and more, ensuring broad compatibility across the GM truck and SUV lineup from 2007-2013.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for a plug-and-play installation, saving you time and money on dealership programming fees.
Where is the BCM located on my 2008 GMC Sierra?
On most 2007-2013 GM trucks and SUVs, including the Sierra, the Body Control Module is located under the driver’s side of the dashboard, usually near the steering column.
What if my airbag light is on after installation?
If the airbag light appears after installing the new BCM, it means the module needs to be synced with the vehicle’s SDM (Sensing and Diagnostic Module). This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure.
Is there a core charge for this part?
No, there is no core charge. You can keep your old module without any additional fees or the hassle of returning it.
Will this fix my intermittent power windows and door locks?
Yes, the BCM directly controls these functions. If you’re experiencing intermittent issues with windows, locks, lights, or wipers, a failing BCM is the most common cause, and this part is the correct fix.