Restore Control Over Your Vehicle’s Electronics
As a technician with over two decades of experience under the hood, I’ve seen firsthand the chaos a failing Body Control Module (BCM) can cause. It’s the central nervous system for your vehicle’s comfort and security features, and when it goes bad, it can feel like your car has a mind of its own. From power windows that won’t budge to a security system that randomly immobilizes your engine, the symptoms are often confusing and deeply frustrating. This isn’t just an inconvenience; it can be a major disruption to your day.
This is more than just a replacement part; it’s a direct solution. We take a reliable Body Control Module and program it with the latest GM software specifically for your vehicle using your VIN. This means it arrives at your door ready to be installed, bypassing the expensive programming fees and wait times at the dealership. This is the fix that gets your GM vehicle’s features working correctly again, restoring order and reliability to your daily drive.
A Technician’s Notebook
I remember a 2011 Chevy Traverse that came into the shop with a list of bizarre complaints. The radio would randomly shut off, the dome lights would stay on, and the power liftgate worked only intermittently. The owner had already replaced the battery and checked fuses with no luck. After connecting my scan tool, I saw multiple communication codes (U-codes) pointing to the BCM. Instead of a complex wiring chase, we ordered a pre-programmed module. The swap took less than 45 minutes, and every single electrical gremlin was gone. It’s a perfect example of how this one component can solve a dozen different problems.
Common Signs of a Failing BCM
If you’re experiencing any of the following, a faulty BCM is the likely culprit. I’ve diagnosed hundreds of these, and the patterns are often very clear. Look out for communication error codes like U0140, U0155, or other U-codes indicating a loss of communication with other modules.
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Instrument cluster lights flickering, gauges behaving oddly, or warning lights staying on (like the security light).
- ✔ The anti-theft system preventing the vehicle from starting.
- ✔ Interior or exterior lights not working correctly (e.g., dome lights won’t turn off, headlights won’t turn on).
- ✔ Remote keyless entry failing to respond.
- ✔ Wipers or horn activating on their own.
A Straightforward Guide to BCM Installation
Replacing the BCM is a manageable job for a DIYer with basic tools. The key is taking your time and being methodical. Remember, this 2006–2013 GM Body Control Module comes programmed, saving you the hardest step.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
- Locate the BCM: On most of these GM models, the BCM is located under the dashboard, often on the driver’s or passenger’s side, or behind the center dash console. A quick search for your specific model will confirm its location.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed BCM into place. Reconnect all the electrical connectors, making sure they click securely into place.
- Reconnect Power: Reattach the negative battery terminal.
- Verify and Test: Start the vehicle and test all the body functions: windows, locks, lights, wipers, etc. Note the post-installation procedures below, as some systems may require a relearn.
Important Post-Installation Steps
While this BCM is programmed to your VIN, your vehicle’s other modules may need to handshake with the new component. Depending on your specific model, you may encounter the following:
- Airbag System Sync: If the airbag warning light is on after installation, a simple procedure called ‘Setup SDM Primary Key in BCM’ is needed. This requires a professional-grade scan tool to sync the systems and clear the light.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure brake lights and traction control function correctly. This can also be performed with a compatible scan tool.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of GM vehicles and part numbers. Please verify your vehicle is on the list below. This part replaces 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, and 95151084.
Frequently Asked Questions
Why do you need my VIN to program the module?
Your Vehicle Identification Number (VIN) allows us to load the exact software and calibrations your vehicle had when it left the factory. This ensures all the specific options for your model (like remote start, sunroof, etc.) work correctly with the new 2006–2013 GM Body Control Module.
Is this part difficult to install for a DIYer?
For someone with basic mechanical skills, the physical swap is straightforward. It typically involves removing a few dash panels and unplugging connectors. Since we pre-program the module, you skip the most complex step that usually requires a dealership.
Do I have to send my old BCM back?
No. There is no core charge for this part. You can keep your original module, which can be helpful for comparison or as a backup.
What tools are needed for the post-installation procedures?
The Airbag System Sync and Brake Pedal Position Relearn procedures require a bi-directional professional scan tool (like a Snap-on, Autel, or GM Tech 2). Most local repair shops can perform these relearns for you quickly if they are needed.
Will this fix my car not starting?
It can. A common failure of the BCM is with the Passlock/Passkey anti-theft system. If the security light is on and the engine won’t crank or start and die, a faulty BCM is a very strong possibility. This programmed module restores that function.