Restore Your Vehicle’s Brain and Banish Electrical Gremlins
As a technician with over two decades of diagnostic experience, I’ve seen it all. A customer comes in, completely frustrated, describing a vehicle that seems possessed. The radio turns on and off by itself, the power windows have a mind of their own, the security light is flashing, and sometimes, the car just refuses to start. These aren’t separate problems; they’re classic symptoms of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s comfort and convenience features, and when it fails, chaos ensues. This isn’t just an annoyance—it can be a serious safety and reliability issue.
Instead of facing a costly trip to the dealership for diagnostics and programming, we offer a straightforward, reliable solution. This is a direct-replacement GM Body Control Module, and the best part is, we handle the complex part for you. Simply provide your vehicle’s VIN during checkout, and our experts will program the module with the latest official GM software specific to your car or truck. It arrives at your door ready for installation, saving you hundreds in dealer fees and programming charges.
A Technician’s Notebook
I remember a 2011 GMC Acadia that came into my shop last winter. The owner was at his wit’s end. The interior lights would flicker, the liftgate wouldn’t open, and the remote start was non-functional. He had already replaced the battery and checked all the fuses. After connecting my scan tool, I saw a slew of U-codes (communication errors), all pointing back to one culprit. The BCM was intermittently losing communication with other modules. We installed one of our pre-programmed BCMs, and within an hour, every single issue was resolved. Seeing the relief on the owner’s face is why I still love this work—providing a real fix that gets people’s lives back to normal.
Common Signs of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that flicker, stay on, or don’t work at all.
- ✔ The security system light is on, or the alarm goes off randomly.
- ✔ Key fob not working or intermittent remote start failure.
- ✔ A ‘no-start’ condition where the engine cranks but won’t fire up.
- ✔ Multiple warning lights on the dash with communication error codes (U-codes).
- ✔ Wipers operating incorrectly or not parking in the correct position.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: The location varies by model. Common spots include under the driver’s side dash (near the steering column), behind the glove box, or in the center console. Your service manual will show the exact location.
- ✔ Disconnect and Remove: Carefully unplug all electrical connectors from the old BCM. They have locking tabs, so be gentle. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed GM Body Control Module in the same location. Securely plug in all the electrical connectors, ensuring each one clicks into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting) and test all body functions: lights, locks, windows, radio, etc.
Important Post-Installation Information
While this GM Body Control Module is designed to be a plug-and-play solution, some vehicles require additional steps to ensure all systems communicate correctly. Please be aware of the following:
- Airbag System Sync: In some cases, the airbag (SRS) warning light may illuminate after installation. This is because the new BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). A professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
- Brake Pedal Position Relearn: Certain models may require a brake pedal position sensor relearn procedure to ensure proper brake light operation and to prevent issues with the traction control or stability control systems.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step of the process.
Will This Fit My Vehicle?
This module is a direct replacement for a wide range of General Motors vehicles and interchanges with the following part numbers:
Compatible 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
Verified Fitment For:
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM acts as a central computer for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, wipers, security system, and the radio.
Will I need to get this module programmed by a dealer?
No. We program the module to your vehicle’s specific VIN before shipping it to you. This makes the installation process much simpler and saves you from expensive dealership programming fees.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive the VIN for programming.
Is there a core charge for this part?
No, there is absolutely no core charge. You can keep your old, non-working module without any extra fees or hassle of returning it.
What if my airbag light comes on after installation?
This can happen on some models. It requires a specific ‘Setup SDM Primary Key in BCM’ procedure, which can be performed by a professional mechanic with a high-level diagnostic scan tool to sync the systems.