End the Electrical Gremlins in Your Buick Lucerne
Are you dealing with bizarre and frustrating electrical issues in your 2006-2011 Buick Lucerne? One moment the power windows work, the next they don’t. Maybe the security light is flashing, the radio acts possessed, or the interior lights have a mind of their own. These aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM), the central hub for your car’s body electronics. Driving with a faulty BCM can be unpredictable and unsafe. This replacement Body Control Module, part number 15872421, is the reliable, long-term solution you need to restore order and get your vehicle functioning correctly again.
Case Study: A Tricky Diagnosis
I remember a 2009 Lucerne that came into my shop with a complaint that would drive any owner crazy. The car would intermittently refuse to start, but only on warm days. The battery was new, the starter checked out, and there were no engine codes. After hooking up my scan tool, I noticed communication with the BCM was dropping out as the cabin temperature rose. On a hunch, I monitored the data stream while using a heat gun near the BCM located behind the right side of the dash. Sure enough, as soon as it got warm, communication was lost and the anti-theft system would engage, preventing a start. A faulty solder joint on the main processor was the culprit—a common failure point. Replacing the faulty unit with a properly prepared 2006-2011 Lucerne BCM solved the problem permanently. This is why a quality replacement is key.
Is Your Lucerne Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, a faulty Body Control Module is the likely cause:
- âś” Erratic or non-functional power windows, door locks, and mirrors.
- âś” Interior dome lights or dashboard lights staying on or not working at all.
- âś” The security system light flashing, leading to a no-start condition.
- âś” Horn honking randomly or not working when pressed.
- âś” Intermittent issues with the radio or climate control display.
- âś” Communication error codes, such as U0140, U0155, or other U-codes, stored in the system.
The Power of Our Cloning Service
The biggest headache with replacing a BCM is the need for expensive programming at a dealership. Our included Cloning Service eliminates that step entirely. We transfer the critical data from your original, failing BCM directly onto this replacement unit. This means the module arrives at your door ready for installation, with no additional programming or key relearning required. It’s a true plug-and-play solution that saves you time, money, and a trip to the dealer. Simply provide us with your vehicle’s VIN after purchase, and we handle the rest, ensuring a seamless repair.
A Straightforward Guide to Installation
Installing your new 2006-2011 Lucerne BCM is a manageable job for a confident DIYer. Here is a general guide to get you started:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait about 10 minutes to ensure all systems are powered down.
- Locate the BCM: In the 2006-2011 Buick Lucerne, the BCM is typically located behind the glove box or on the right side of the dashboard. You will likely need to remove the glove box assembly for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New BCM: Mount the new, pre-programmed BCM in the same location and securely fasten it. Reconnect all the electrical connectors, making sure they click into place.
- Reassemble and Reconnect: Reinstall the glove box and any other panels you removed. Reconnect the negative battery terminal.
- Post-Installation Checks: Start the vehicle and test all body functions—windows, locks, lights, radio, etc. Note that some vehicles may require the post-installation procedures mentioned below.
Important Post-Installation Notes
While our cloning service makes this a plug-and-play process, some GM vehicles may require a ‘relearn’ or ‘sync’ procedure for specific systems after a BCM is replaced. This is dependent on your vehicle’s specific configuration.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure proper function of the brake lights and stability control systems.
Disclaimer: Vehicle systems vary. Always refer to a factory service manual or consult a qualified professional if you are unsure about any step.
Guaranteed Vehicle Compatibility
This module is a direct replacement for part number 15872421 and other interchangeable numbers. It is guaranteed to fit the following vehicles:
AVALANCHE 1500 10 Body Control (BCM); (under steering column), ID 25892622
CAPRICE 11-13 Body Control (BCM)
CAPTIVA SPORT 12 Body Control (BCM); (center dash), ID 20921435, 20921436, or 22860591
CTS 08 Body Control (BCM); RH dash
CTS 08-13 Body Control (BCM); LH dash
DTS 06-11 Body Control (BCM); (RH center dash)
ENCLAVE 08-12 Body Control (BCM); (LH dash)
EQUINOX 07-09 Body Control (BCM); (center dash)
ESCALADE 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
ESCALADE ESV 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
ESCALADE EXT 10 Body Control (BCM); (under steering column), ID 25892622
EXPRESS 1500 VAN 08-12 Body Control (BCM); (center dash)
EXPRESS 2500 VAN 08-12 Body Control (BCM)
EXPRESS 3500 VAN 08-12 Body Control (BCM)
G8 08-09 Body Control (BCM); (center dash)
HUMMER H2 08-09 Body Control (BCM); (LH firewall)
IMPALA 06-12 Body Control (BCM); (LH dash)
IMPALA 13 Body Control (BCM); (LH dash), ID 22820315
LUCERNE 06-11 Body Control (BCM); (right side dash)
MONTE CARLO 06-07 Body Control (BCM); (LH steering column)
OUTLOOK 07-10 Body Control (BCM); (center dash)
SAVANA 1500 VAN 08-12 Body Control (BCM); (center dash)
SAVANA 2500 VAN 08-12 Body Control (BCM)
SAVANA 3500 VAN 08-12 Body Control (BCM)
SRX 07-09 Body Control (BCM); LH dash
STS 10 Body Control (BCM); center dash
SUBURBAN 1500 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
TAHOE 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
TORRENT 07-09 Body Control (BCM); (center dash)
TRAVERSE 09-12 Body Control (BCM); (LH dash)
VUE 08-10 Body Control (BCM); (center dash)
YUKON 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
YUKON XL 1500 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
This part is also a direct replacement for the following part numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 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 (Vehicle Identification Number) allows us to access the exact factory software and calibration files for your specific vehicle. This ensures the cloned BCM works perfectly with the options your car was built with.
What is the Cloning Service?
Our Cloning Service involves transferring the essential configuration and security data from your original BCM to the replacement unit. This makes the new module plug-and-play, avoiding the need for a costly trip to the dealership for programming.
Do I need to send my original BCM to you?
Yes, for the Cloning Service to be performed, you will need to send us your original module. We will clone the data and return your original module along with the newly prepared replacement.
Will I need a scan tool after installation?
In most cases, no. The module is plug-and-play. However, as noted above, some GM vehicles may require a scan tool to sync the airbag system or perform a brake pedal position relearn if a warning light appears.
Is this a reliable fix for my 2006-2011 Lucerne BCM issues?
Absolutely. We address the common failure points found in the original modules and use the latest GM software updates during the programming process, providing a durable and dependable solution to your vehicle’s electrical problems.