Restore Your Vehicle’s Electrical System with a Plug-and-Programmed BCM
Are you chasing electrical gremlins in your GM vehicle? Flickering lights, power windows with a mind of their own, or a security light that won’t turn off are classic signs of a failing Body Control Module (BCM). As the central command for your car’s body electronics, a faulty BCM can cause widespread, frustrating issues. This isn’t just an inconvenience; it can affect vehicle security and safety systems. For over 20 years, I’ve seen how a failing BCM can make a perfectly good car feel unreliable. That’s why we offer a straightforward, dependable solution.
This replacement GM Body Control Module is your direct-fit answer. We take the biggest headache out of the repair process: programming. Simply provide your vehicle’s VIN at checkout, and our technicians will flash the module with the latest, most stable software from GM specifically for your car. It arrives at your door ready for installation, saving you a costly trip to the dealership and hours of diagnostic guesswork.
A Technician’s Notebook
I remember a 2009 Chevy Impala that came into the shop with a laundry list of bizarre electrical problems. The dome lights would randomly turn on while driving, the radio display would go blank, and the remote key fob worked intermittently. The owner had already replaced the battery and checked all the fuses. After connecting my scan tool, I found multiple communication error codes (U-codes) pointing back to the BCM. A failing internal processor was causing data corruption across the network. By installing a new, properly programmed GM Body Control Module, we resolved every single issue in one go. It’s a perfect example of how one component can be the root of so many problems.
Common Signs of a Failing BCM
If you’re experiencing any of the following, a faulty BCM is the likely culprit. A professional scan tool might show various B-series (Body), C-series (Chassis), or U-series (Communication) Diagnostic Trouble Codes (DTCs).
- ✔ Erratic power windows, door locks, or mirrors
- ✔ Interior or exterior lights that don’t work correctly or stay on
- ✔ The security system light is on, preventing the car from starting
- ✔ Horn sounding unexpectedly or not working at all
- ✔ Intermittent dashboard warning lights without a clear cause
- ✔ Key fobs that stop working or function unreliably
- ✔ Communication errors with other modules (U0140 – Lost Communication With Body Control Module)
Your Straightforward BCM Installation Guide
Replacing the BCM is a manageable job for a confident DIYer. While the location varies slightly by model (see fitment list), the process is generally similar. Always have your vehicle’s service manual handy for specific details.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow all systems to power down completely.
- Locate the BCM: On most of these vehicles, the BCM is located under the driver’s side or center of the dashboard. You may need to remove a lower dash panel or glove box for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be pressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, making sure they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting the engine) and test all body functions: lights, locks, windows, radio, etc.
- Perform Relearn Procedures: If necessary, perform the post-installation procedures noted below, such as the brake pedal position relearn or an airbag system sync if the warning light is on.
Important Post-Installation Steps
Because this GM Body Control Module is new and programmed to your VIN, some related systems may need to be re-synced with it after installation. This is a normal part of the process.
- Airbag System Sync: If your airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed using a bi-directional scan tool. This syncs the BCM with the airbag module (SDM).
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn is required to ensure brake lights and traction control function correctly. This also typically requires a professional scan tool.
- No Core Charge: You are not required to return your old module. Keep it, discard it, or recycle it—the choice is yours.
Disclaimer: Vehicle systems and procedures can vary. We always recommend consulting a factory service manual or a certified technician for your specific make and model.
Will This Fit My Vehicle?
This module is a direct replacement for the following part numbers and fits a wide range of GM vehicles. Please match your original part number from the list below or verify fitment by your vehicle model.
Interchangeable Part Numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084
Compatible Models Include (but are not limited to):
- Acadia (2007-2012)
- Avalanche 1500 (2010)
- Captiva Sport (2012)
- Caprice (2011-2013)
- CTS (2008-2013)
- DTS (2006-2011)
- Enclave (2008-2012)
- Equinox (2007-2009)
- Escalade, ESV, EXT (2010)
- Express / Savana Vans (2008-2012)
- G8 (2008-2009)
- Hummer H2 (2008-2009)
- Impala (2006-2013)
- Lucerne (2006-2011)
- Monte Carlo (2006-2007)
- Outlook (2007-2010)
- SRX (2007-2009)
- STS (2010)
- Suburban 1500 (2010)
- Tahoe / Yukon (2010)
- Torrent (2007-2009)
- Traverse (2009-2012)
- Vue (2008-2010)
How does the VIN programming work?
How does the VIN programming work?
After you complete your purchase, you will need to provide us with your 17-digit Vehicle Identification Number (VIN). Our technicians use this VIN to load the exact software and vehicle-specific options from GM’s database onto the BCM before it ships. This ensures it works correctly with your vehicle’s features.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
What tools do I need for installation?
For most installations, you’ll only need basic hand tools like a socket set, screwdrivers, and possibly a trim removal tool to access the BCM. However, for post-installation relearn procedures, a professional-grade bidirectional scan tool may be required.
Will this fix my ‘Service Airbag’ light?
If the BCM was the cause of the light, this replacement can be part of the solution. However, after installation, the airbag system (SDM) must be synced with the new BCM using a specific scan tool procedure. If the light persists, there may be another issue within the SRS system.
Is this a brand new part?
This is a high-quality, fully tested replacement part that has been programmed with new, vehicle-specific software. It is guaranteed to restore your vehicle’s functionality.
What if I install it and something still doesn’t work?
First, double-check that all connectors are fully seated. Second, verify if any required relearn procedures, like the brake pedal position sensor or airbag sync, need to be performed. If problems persist, it could indicate an issue with a different component that the BCM communicates with, such as a faulty switch or sensor.