Is Your Buick Lucerne Acting Possessed? The BCM is Likely the Culprit.
If you’re dealing with a frustrating mix of electrical gremlins in your 2006-2011 Buick Lucerne—like power windows with a mind of their own, flickering interior lights, a security system that won’t behave, or even a car that refuses to start—you’re not alone. These are classic signs of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s comfort and convenience features. When it starts to fail, it can make driving your car an unpredictable and annoying experience.
A Real-World Scenario from My Shop
“A customer brought in his 2009 Lucerne last month. The radio would turn on and off randomly, the driver’s side window wouldn’t go down, and the key fob was completely unresponsive. He’d already replaced the battery and checked fuses, but nothing worked. After a quick diagnostic scan pointed towards a communication breakdown, we identified a faulty BCM. Instead of sending him to a dealership for a costly replacement and programming, we installed one of our pre-programmed units. In under an hour, every single issue was resolved. He drove away with a car that felt brand new again, saving hundreds of dollars.”
Common Symptoms of a Failing BCM:
- ✔ Erratic or non-functioning power windows, door locks, and mirrors.
- ✔ Interior or dashboard lights staying on or not turning on at all.
- ✔ The security system or alarm malfunctioning or preventing the car from starting.
- ✔ Key fob not working correctly.
- ✔ False warning lights appearing on the instrument cluster (e.g., airbag, brake).
- ✔ Complete no-start condition where the engine doesn’t crank.
Your Direct-Fit, Programmed Solution: The 2006–2011 Lucerne Body Control Module
Forget expensive dealership visits and the hassle of finding a shop with the right programming tools. This Body Control Module, part number 25934763, is the reliable, cost-effective solution you’ve been searching for. We take the guesswork out of the repair by programming the module specifically for your vehicle using your VIN. It arrives at your door with the latest GM software updates, ready for installation.
Easy Installation Process: Get Back on the Road Fast
- Safety First: Always disconnect the negative battery terminal before working on any vehicle electronics.
- Locate the BCM: On the 2006-2011 Lucerne, the BCM is typically located behind the right side of the dashboard (passenger side). You may need to remove the glove box or a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. Note their orientation. Then, unbolt the module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM and securely reconnect all electrical connectors.
- Post-Installation Procedures (CRITICAL): Reconnect the battery. While the main programming is done, you must perform a few final steps. Use a capable diagnostic tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to clear the airbag light. Some vehicles may also need a Brake Pedal Position Sensor recalibration. If you are unsure, consult a professional.
Guaranteed Compatibility
This module is a direct replacement for a wide range of GM vehicles and part numbers. If your original BCM has any of the following numbers, this unit is the correct fit for you:
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.
This part also fits many other models including the Chevrolet Impala, Equinox, Tahoe, Express Van, GMC Acadia, Savana Van, Cadillac DTS, CTS, and more. Please check the detailed fitment list to confirm for your specific vehicle.
Frequently Asked Questions (FAQ)
- Q: How do I provide my VIN for programming?
- A: After you complete your purchase, simply send us a message with your vehicle’s 17-digit VIN. We cannot ship the module until we receive this information to ensure it is programmed correctly for your car.
- Q: Is this a plug-and-play part?
- A: It’s very close. We handle the main programming, which is the most difficult part. However, as noted in the installation steps, a final security/airbag key setup and possibly a brake sensor relearn are required with a diagnostic tool for full functionality.
- Q: Will this fix my no-start problem?
- A: A faulty BCM is a very common cause of no-start issues related to the vehicle’s anti-theft system. If your BCM is the root cause, this replacement part will resolve the problem once the security relearn is completed.
- Q: What tools are needed for the final steps?
- A: You will need a bi-directional diagnostic scan tool that can perform security and body control module functions. Many professional-grade scanners have this capability. If you don’t have one, a local independent mechanic can typically perform these final steps for you.
- Q: How do I know for sure my BCM is bad?
- A: The best way is with a professional diagnosis using a scan tool to check for communication error codes (U-codes) from the BCM. However, if you are experiencing multiple, unrelated electrical symptoms from the list above, the BCM is the most probable cause.