Restore Your Vehicle’s Electrical System with a Plug-and-Play Solution
Are you chasing electrical gremlins in your GM vehicle? Flickering lights, malfunctioning power windows, a security system that won’t cooperate, or a car that refuses to start can all point to one culprit: a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen how a faulty BCM can turn a reliable vehicle into a source of constant frustration. It’s the central nervous system for your car’s comfort and security features, and when it goes, it can cause a cascade of confusing problems.
This isn’t just a replacement part; it’s a definitive fix. We offer a high-quality GM Body Control Module that eliminates the biggest headache of this repair—the programming. Simply provide us with your vehicle’s VIN (Vehicle Identification Number) during checkout, and our experts will flash the module with the latest official GM software specific to your car. It arrives at your door ready for installation, saving you from expensive towing bills and the high labor costs of dealership programming.
A Technician’s Notebook
A customer brought in a 2011 Chevy Impala last month with a laundry list of bizarre issues. The dome lights would flicker randomly, the radio would shut off, and occasionally, the car wouldn’t start, just showing the security light. They had already replaced the battery and alternator with no luck. After a quick scan, I saw multiple communication codes pointing to the BCM. Instead of a costly dealer visit, we installed one of our pre-programmed modules. The entire job took less than an hour, and every single electrical issue was resolved. It’s a common scenario, and this is the most effective solution.
Is Your Vehicle Showing These Classic BCM Failure Signs?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The anti-theft or security light is illuminated, preventing the engine from starting.
- ✔ Dashboard warning lights appearing and disappearing without a clear cause.
- ✔ Horn sounding unexpectedly or not working when pressed.
- ✔ Problems with the heating and A/C blower motor controls.
- ✔ Communication errors with other modules when read by a diagnostic scan tool.
Your Straightforward BCM Installation Guide
Replacing the BCM is a manageable task for a confident DIYer. While the exact location varies by model (check your service manual), the general process is straightforward.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Locate the BCM: On most of these GM vehicles, the BCM is located under the driver’s side or passenger’s side of the dashboard, or behind the center console. It’s a plastic box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug all wiring harnesses from the old BCM. The connectors have locking tabs that need to be pressed or lifted. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely plug in all the wiring harnesses, ensuring each one clicks into place.
- Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- Perform Final Procedures: After installation, a few final steps are required to ensure full system integration. This is critical for safety and performance.
Important Post-Installation Steps
After installing your new GM Body Control Module, you must perform a couple of key procedures to sync the new part with your vehicle’s other systems. This is standard for this type of repair.
- Airbag System Reset: The airbag warning light will likely be on. You will need to use a compatible professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This re-establishes communication between the new BCM and the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Sensor Relearn: Some models may require a recalibration of the brake pedal position sensor. This ensures the brake lights and stability control systems function correctly. This is also done with a diagnostic tool.
If you are not equipped to perform these steps, a local independent mechanic can typically complete these relearn procedures for you quickly.
Verified Fitment For a Wide Range of GM Vehicles
This module is a direct replacement for numerous part numbers and fits a vast array of General Motors cars, trucks, and SUVs. Please verify your model and year below. This part replaces the following 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.
Frequently Asked Questions
Why do you need my VIN to program the GM Body Control Module?
Your VIN allows us to load the exact software and vehicle-specific options (like keyless entry, power seat type, etc.) that your car was built with. This ensures all features work correctly right out of the box, making the installation process much smoother.
Is this a difficult part to replace myself?
For most DIYers with basic tools, this is a very manageable job. The main challenge is often just accessing the module under the dash. Our pre-programming service handles the most complex part of the repair, which is the software configuration.
Will this fix my ‘Service Theft System’ light?
Yes, in most cases. The BCM is a core component of the vehicle’s anti-theft system (Pass-Key/Passlock). A faulty BCM is a very common reason for a persistent security light and a no-start condition. This programmed module will restore that functionality.
What tools are required for the post-installation procedures?
The airbag system reset and brake pedal relearn require a bi-directional diagnostic scan tool. Entry-level code readers cannot perform these functions. Many local repair shops can perform these procedures for you if you don’t have access to such a tool.
Is this part new or used?
This is a quality, tested replacement part that has been verified for full functionality. It is then programmed with fresh, vehicle-specific software from GM to ensure reliable performance.