Restore Full Electrical Control to Your Buick Lucerne
Are you chasing electrical gremlins in your 2006-2011 Buick Lucerne? Intermittent power windows, flickering dash lights, or a security system that has a mind of its own are classic signs of a failing Body Control Module (BCM). As the central nervous system for your vehicle’s comfort and convenience features, a faulty BCM can make your daily drive incredibly frustrating. In my 20+ years as a technician, I’ve seen these modules cause some of the most confusing symptoms, often leading owners down a rabbit hole of expensive, incorrect diagnoses.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and dealer-level expense out of the equation. Simply provide your vehicle’s VIN at checkout, and our experts will program this BCM with the latest GM software specific to your Lucerne. This means when it arrives, it’s ready to be installed, restoring the stable, predictable performance you expect from your car.
Common Signs of a Failing BCM in Your Lucerne
If your vehicle is exhibiting any of these behaviors, a failing BCM is the likely culprit. A scan tool might show communication error codes like U0140, U0155, or other U-codes pointing to a network failure originating from the module.
- ✔ Erratic or non-functional power windows, door locks, and interior/exterior lights.
- ✔ The security or anti-theft system light stays on, preventing the car from starting.
- ✔ Dashboard gauges behaving erratically or not working at all.
- ✔ Unresponsive key fob or remote start functions.
- ✔ False warning messages appearing on the driver information center (DIC).
- ✔ Inconsistent horn or radio operation.
A Technician’s Notebook: The Case of the Haunted Lucerne
A customer brought in a 2009 Lucerne with a truly bizarre list of complaints. The radio would change stations on its own, the driver’s side window wouldn’t go down, and the dome light would flicker at random intervals. They had already replaced the battery and checked all the fuses. After connecting my diagnostic scanner, I saw multiple communication loss codes with various modules. Experience told me this wasn’t multiple failures, but one central failure. We traced it to the BCM. Instead of sending them to a dealership for a costly replacement and programming, we installed one of our pre-programmed units. The total time from diagnosis to a fully functional car was under two hours. The customer was thrilled to have their car back to normal without the dealership price tag or wait time. This is the exact solution we offer you.
A Straightforward Guide to BCM Installation
Installing your new 2006-2011 Lucerne BCM is a manageable job for a confident DIYer. In the Lucerne, the BCM is typically located behind the right side of the dashboard, accessible by removing the glove box assembly.
- Safety First: Disconnect the negative terminal from your car’s battery and wait at least 10 minutes to allow all systems to power down completely.
- Access the Module: Remove the glove box and any surrounding trim panels needed to gain clear access to the BCM. It’s a black plastic box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug all wiring harnesses from the old BCM. They have release tabs that need to be pressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all wiring harnesses. Ensure each connector clicks firmly into place.
- Reconnect and Test: Reassemble your dash and reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting the engine) and test all functions: windows, locks, lights, radio, etc.
- Post-Install Checks: As noted below, some vehicles may require a ‘Brake Pedal Position Relearn’ or an ‘Airbag System Sync’ if specific warning lights appear. These procedures require a compatible professional scan tool.
Verified Vehicle Compatibility
This BCM is a direct-fit replacement for a wide range of General Motors vehicles. While this listing is focused on the 2006-2011 Lucerne BCM, it also fits the models listed below. Always verify your original part number against our list to ensure perfect compatibility.
This module 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
Fits Models Including:
- Buick Lucerne (2006-2011)
- Cadillac DTS (2006-2011), CTS (2008-2013), Escalade (2010), SRX (2007-2009), STS (2010)
- Chevrolet Impala (2006-2013), Monte Carlo (2006-2007), Equinox (2007-2009), Traverse (2009-2012), Tahoe (2010), Suburban (2010), Avalanche (2010), Express Van (2008-2012), Captiva Sport (2012), Caprice (2011-2013)
- GMC Acadia (2007-2012), Yukon (2010), Savana Van (2008-2012)
- And many more. Please check the detailed fitment list for your specific vehicle.
Frequently Asked Questions
Why is providing my VIN so important?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and vehicle-specific options (like remote start, sunroof, etc.) that your Lucerne came with from the factory. This ensures seamless integration and functionality right out of the box.
Is any additional programming needed after installation?
In most cases, no. Because we program it to your VIN, it’s a plug-and-play installation. However, in some instances, a ‘Brake Pedal Position Relearn’ or ‘Airbag System Sync’ may be required if those specific warning lights appear after install. This requires a professional-grade scan tool.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module, which is helpful if you ever need to reference its part number.
Will this fix my ‘Service Theft System’ message?
Yes, a faulty BCM is one of the most common causes of anti-theft system errors on these GM vehicles. Replacing it with our pre-programmed unit will resolve this issue by correctly matching the security information to your vehicle’s key and ignition system.
Can I install this myself?
If you are comfortable with basic hand tools and removing interior dash panels, this is a very achievable DIY repair. Following our installation guide and disconnecting the battery are the most critical steps for a successful replacement.
What if I have an airbag light after installation?
An airbag light indicates the new BCM needs to be synced with the vehicle’s SDM (Sensing and Diagnostic Module). A procedure called ‘Setup SDM Primary Key in BCM’ must be performed by a professional mechanic or a shop with a capable diagnostic tool.