Restore Full Functionality to Your Buick Lucerne
Is your 2006-2011 Buick Lucerne experiencing a baffling array of electrical issues? From power windows and door locks that have a mind of their own to a security light that won’t turn off, a failing Body Control Module (BCM) can turn your comfortable ride into a source of daily frustration. The BCM is the central command for your vehicle’s body electronics, and when it fails, it can cause intermittent and confusing problems that are often difficult to diagnose. This is a direct-fit replacement solution, programmed specifically for your vehicle to restore order and reliability.
A Technician’s Notebook: The Phantom Drain
I once had a 2008 Lucerne in my bay with a classic BCM failure symptom: a parasitic battery drain that nobody could pinpoint. The owner had replaced the battery twice. Every morning, it was dead. After checking all the usual suspects, I hooked up my multimeter and started pulling fuses. The draw dropped significantly when I pulled the BCM fuse. The internal circuitry of the old module had failed, preventing it from going to ‘sleep’ and causing it to constantly draw power. Installing a properly programmed BCM didn’t just fix the weird electrical glitches; it solved the dead battery problem for good.
Common Signs of a Failing BCM
If you’re noticing these issues, your BCM is the likely culprit. A replacement is often the most effective way to solve these problems permanently. Look out for:
- ✔ Erratic or non-functional power windows, door locks, or interior lights.
- ✔ The security system light stays on or flashes, potentially causing a no-start condition.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ Inconsistent operation of dashboard gauges or warning lights.
- ✔ Communication error codes, such as U0140, indicating a loss of communication with the BCM.
- ✔ Wipers activating on their own or not turning off.
Your Straightforward BCM Installation Guide
Installing your pre-programmed 2006-2011 Lucerne Body Control Module is a manageable task for a confident DIYer. The BCM is typically located on the right side of the dash. Follow these general steps:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Access the Module: You will likely need to remove the glove box or a lower dash panel on the passenger side to gain access to the BCM.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that must be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New BCM: Mount the new module in the same location and securely reconnect all electrical connectors. Ensure they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Test Functions: Start the vehicle and test all body functions—windows, locks, lights, wipers, etc.—to confirm the repair was successful.
Important Post-Installation Notes
While we program the module to your VIN for a seamless experience, some vehicle systems may require a ‘handshake’ with the new BCM. This may include an Airbag System Sync (‘Setup SDM Primary Key in BCM’) or a Brake Pedal Position Relearn. These procedures typically require a professional scan tool and are only necessary if related warning lights appear after installation. And remember, there’s no core charge, so you can keep your old part.
Verified Fitment for Your GM Vehicle
This BCM is a direct replacement for part number 15872421 and is compatible with a wide range of General Motors vehicles. While this listing is focused on the 2006-2011 Lucerne Body Control Module, it also fits the following models. Please verify your part number or contact us with your VIN to ensure compatibility.
ACADIA 07-12 Body Control (BCM); (LH dash)
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)
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 & ESV/EXT 10 Body Control (BCM); (under steering column)
EXPRESS/SAVANA VANS 08-12 Body Control (BCM); (center dash)
G8 08-09 Body Control (BCM); (center dash)
HUMMER H2 08-09 Body Control (BCM); (LH firewall)
IMPALA 06-13 Body Control (BCM); (LH dash)
MONTE CARLO 06-07 Body Control (BCM); (LH steering column)
OUTLOOK 07-10 Body Control (BCM); (center dash)
SRX 07-09 Body Control (BCM); LH dash
STS 10 Body Control (BCM); center dash
SUBURBAN/TAHOE/YUKON/YUKON XL 10 Body Control (BCM); (under steering column)
TORRENT 07-09 Body Control (BCM); (center dash)
TRAVERSE 09-12 Body Control (BCM); (LH dash)
VUE 08-10 Body Control (BCM); (center dash)
Note: This is not an exhaustive list. Compatibility may depend on specific options or part number IDs.
What does ‘programmed to my VIN’ mean?
It means we load your vehicle’s specific factory software and settings onto the BCM using your Vehicle Identification Number (VIN). This ensures the module works correctly with the options and systems equipped on your car, eliminating the need for expensive dealership programming.
Is this a difficult part to install myself?
For someone with basic mechanical skills, this is a very manageable job. Accessing the module behind the dash is usually the most time-consuming part. Since our module arrives pre-programmed, the physical swap is straightforward and requires no special programming tools.
Will this fix my car’s security light issue?
In most cases, yes. The BCM is a critical part of the vehicle’s anti-theft system (Pass-Key/Passlock). A faulty BCM is a very common cause of a persistent security light and related no-start problems. Replacing it often resolves these issues.
Do I need to send my old BCM back?
No. We do not require you to return your original module. There is no core charge associated with this purchase, saving you the time and expense of a return shipment.
What if my airbag light comes on after installation?
This is uncommon, but if it happens, it means the new BCM needs to be electronically synced with the airbag’s Sensing and Diagnostic Module (SDM). This procedure, called ‘Setup SDM Primary Key in BCM,’ requires a professional-grade scan tool to complete.