Restore Your Buick’s Electrical System with a Plug-and-Play Solution
Is your 2006-2011 Buick Lucerne experiencing bizarre electrical issues? Flickering dashboard lights, malfunctioning power windows and locks, or a security system that has a mind of its own are classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and hard-to-diagnose problems. In my 20+ years as a technician, I’ve seen these modules cause everything from intermittent no-start conditions to complete communication loss with other vehicle systems, often triggering a flurry of U-series (communication) trouble codes.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the hassle and high cost of dealership visits out of the equation. Simply provide us with your vehicle’s VIN during checkout, and our experts will program this BCM with the latest GM software specific to your Lucerne. This ensures that when it arrives, it’s ready to be installed, restoring the precise functionality your car had when it left the factory.
Case Study: A Tricky Diagnosis
A customer brought in an ’08 Lucerne with a complaint that was driving them crazy: the interior lights would pulse randomly, the radio would shut off, and the power door locks would cycle while driving. They’d already replaced the battery and checked the alternator. After connecting my scan tool, I found multiple communication loss codes pointing towards the BCM. Instead of sending them to a dealer for a new module and a hefty programming fee, we installed one of our pre-programmed units. The entire job took less than an hour, and all the ghost-in-the-machine issues were gone. This is the value of a VIN-matched part—it turns a complex electronic problem into a straightforward repair.
Common Signs of a Failing BCM
If you’re noticing any of the following, your BCM is the likely culprit. A failing module can disrupt communication across the vehicle’s network, often setting codes like U0140, U0155, or U0100.
- ✔ Power windows, mirrors, or door locks operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security system light flashing, or the car alarm going off randomly.
- ✔ Intermittent no-start condition where the engine cranks but won’t fire up.
- ✔ Inaccurate or dead gauges on the instrument cluster.
- ✔ Remote keyless entry failing to work consistently.
A Straightforward Guide to BCM Installation
Installing your new 2006-2011 Lucerne Body Control Module is a manageable job for a confident DIYer. For the Buick Lucerne, the BCM is typically located on the right side of the dashboard, accessible after removing the glove box or a lower dash panel.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting any electrical work.
- Access the Module: On your Lucerne, remove the necessary panels to gain clear access to the BCM on the right side of the dash.
- Disconnect and Remove: Carefully unplug all electrical connectors from the old BCM. Note their orientation. Then, unbolt or unclip the module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical connectors.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Final Checks: Start the vehicle and test all body functions—lights, locks, windows, radio, etc.—to confirm the repair was successful. Note the post-installation procedures below, as some systems may require recalibration.
Important Post-Installation Notes
While this module is programmed for your VIN, some vehicle systems may require a ‘handshake’ with the new BCM. This is normal.
- 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 relearn may be required to ensure brake lights and traction control function correctly.
- No Core Charge: You can keep your old module, as there is no core charge or need to return it.
Disclaimer: Vehicle systems vary. Always refer to a factory service manual or a certified mechanic if you are unsure about any step.
Verified Vehicle Compatibility
This BCM is a direct replacement for part number 20864767 and a wide range of other GM part numbers. Please verify your part number or contact us with your VIN to confirm compatibility. This module fits the following vehicles, among others:
- 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
- ESCALADE ESV 10
- ESCALADE EXT 10
- EXPRESS 1500 VAN 08-12
- EXPRESS 2500 VAN 08-12
- EXPRESS 3500 VAN 08-12
- G8 08-09
- HUMMER H2 08-09
- IMPALA 06-13
- LUCERNE 06-11
- MONTE CARLO 06-07
- OUTLOOK 07-10
- SAVANA 1500 VAN 08-12
- SAVANA 2500 VAN 08-12
- SAVANA 3500 VAN 08-12
- SRX 07-09
- STS 10
- SUBURBAN 1500 10
- TAHOE 10
- TORRENT 07-09
- TRAVERSE 09-12
- VUE 08-10
- YUKON 10
- YUKON XL 1500 10
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.
Frequently Asked Questions
Why do you need my VIN?
Your VIN is essential for us to program the BCM with the exact software and settings for your vehicle’s specific options. This ensures compatibility and proper function, just like a part from the dealer, but without the extra trip.
Is this BCM truly plug-and-play?
Yes, for the vast majority of functions. Because it is pre-programmed to your VIN, it eliminates the need for initial setup programming. However, as noted, certain integrated systems like the airbag (SRS) may require a simple ‘relearn’ or sync procedure with a professional scan tool after installation.
What if my airbag light comes on after I install it?
This is an expected possibility. It means the new BCM needs to be electronically introduced to the airbag’s Supplemental Deployment Module (SDM). A repair shop with a capable bidirectional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Do I need to send my old BCM back?
No. We do not require a core return for this part. You can keep your original module.
What tools are needed for the installation?
Basic hand tools are usually all that’s required for the physical installation, such as a socket set and screwdrivers to remove dash panels. No special programming tools are needed from your end, as we handle all the programming before shipment.