Restore Your Buick’s Electrical System with a Reliable, Programmed BCM
If your 2006-2011 Buick Lucerne is acting possessed—with flickering lights, unresponsive power windows, or random warning chimes—the Body Control Module (BCM) is the likely culprit. As the central nervous system for your vehicle’s comfort and convenience features, a failing BCM can cause a cascade of frustrating electrical gremlins. This isn’t just an annoyance; it can affect vehicle security and safety. We offer a dependable solution: a high-quality replacement BCM, professionally programmed with the latest GM software specifically for your vehicle’s VIN.
Case Study: A Tricky Diagnosis
A customer brought in a 2008 Lucerne with a baffling set of symptoms. The radio would turn on and off by itself, the driver’s side power window worked intermittently, and the security light would stay illuminated, sometimes preventing the car from starting. They had already replaced the battery and checked all the fuses. After connecting my scan tool, I found a series of U-codes (U0140, U0155) indicating a loss of communication with the BCM. In my 20+ years of experience, this pattern almost always points to an internal failure in the BCM itself, often due to failing solder joints or capacitor degradation from heat and age. Replacing the BCM with a pre-programmed unit like this one resolved all issues in under an hour.
Is Your Lucerne Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The security system acting erratically or preventing the car from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ False warnings on the instrument cluster (e.g., “Door Ajar” light).
- ✔ Diagnostic trouble codes (DTCs) related to communication loss, such as U0140, U0155, or B1001.
A Straightforward Guide to Installation
Installing your new 2006-2011 Lucerne BCM is a manageable job for a confident DIYer. Since we program the module before shipping, you can avoid a costly trip to the dealership. The BCM in the Lucerne is located behind the glove box on the right side of the dashboard.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow all modules to power down completely.
- Access the Module: Open the glove box. You may need to press in on the sides to release the retaining stops, allowing it to swing down fully and reveal the area behind it.
- Locate the BCM: Identify the old BCM. It’s a black plastic box with several large multi-pin electrical connectors plugged into it.
- Disconnect and Remove: Carefully unplug all electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket and remove it from the vehicle.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location. Securely reconnect all electrical connectors, ensuring they click into place.
- Final Steps: Re-install the glove box and reconnect the negative battery terminal. Start the vehicle to confirm that the electrical issues are resolved.
Important Post-Installation Information
While this BCM is programmed for a direct installation, some vehicle systems may require a relearn procedure to sync properly. Please be aware of the following:
- Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light and traction control operation.
- No Core Charge: We do not require you to send your old part back. There is no core charge associated with this purchase.
Disclaimer: Vehicle systems vary. Always consult a factory service manual or a qualified technician if you are unsure about any step.
Guaranteed Vehicle Compatibility
This Body Control Module is a direct fit for the 2006-2011 Buick Lucerne. It is also compatible with a wide range of other GM vehicles and supersedes multiple part numbers, ensuring you get the correct component with the most current software. Please verify your original part number against this list for guaranteed compatibility.
Replaces 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: Acadia (07-12), Avalanche 1500 (10), Caprice (11-13), Captiva Sport (12), CTS (08-13), DTS (06-11), Enclave (08-12), Equinox (07-09), Escalade (10), Express/Savana Vans (08-12), G8 (08-09), Hummer H2 (08-09), Impala (06-13), Monte Carlo (06-07), Outlook (07-10), SRX (07-09), STS (10), Suburban 1500 (10), Tahoe (10), Torrent (07-09), Traverse (09-12), Vue (08-10), Yukon (10). Please check the detailed fitment list to confirm your specific model and options.
Frequently Asked Questions
2006-2011 Lucerne BCM
Will this fix my ‘Service Security System’ message?
A faulty BCM is a very common cause of security system errors and no-start conditions in these vehicles. While other issues can cause this message, replacing a failed is often the correct solution.