Restore Your Buick’s Electrical System with a VIN-Programmed BCM

Is your 2006-2011 Buick Lucerne experiencing a frustrating array of electrical problems? From power windows that have a mind of their own to dashboard lights flickering without reason, these are classic signs of a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can disrupt everything from your interior lighting and security system to your power locks and driver information display. This isn’t just an annoyance; it’s a critical failure that can compromise your vehicle’s functionality and safety.

We offer a dependable and straightforward solution: a replacement Body Control Module, part number 15921353, that arrives at your door fully programmed for your specific vehicle. Using the VIN you provide at checkout, we load the latest GM-certified software onto the module. This crucial step ensures seamless integration with your Lucerne’s existing systems, eliminating the need for an expensive trip to the dealership for programming. You get a reliable part that’s ready for installation right out of the box.

From the Diagnostic Bay: The Case of the Ghostly Lucerne

I remember a 2009 Lucerne that came into my shop with what the owner called “ghosts in the machine.” The radio would turn off, the dome light would stay on, and the anti-theft system would randomly engage, preventing the car from starting. A scan showed a flurry of communication errors (U-codes) pointing to the BCM. After confirming power and ground to the module were solid, we knew the internal logic had failed. Swapping in a VIN-programmed BCM like this one resolved every single issue in one go. It’s a common failure point I’ve seen dozens of times on these platforms, and a pre-programmed module is the most efficient fix.

Common Signs of a Failing BCM

If you’re experiencing any of the following, a failing BCM is the likely culprit. A diagnostic scan might reveal communication codes like U0140, U0155, or other B-series (Body) codes.

✔ Power windows, locks, or mirrors operating erratically or not at all.
✔ Interior or exterior lights flickering, staying on, or not turning on.
✔ The vehicle’s security system engaging randomly, causing no-start conditions.
✔ Inaccurate or malfunctioning gauges on the instrument cluster.
✔ Warning lights (like the airbag or ABS light) appearing for no apparent reason.
✔ Remote keyless entry failing to work consistently.

Your Straightforward BCM Installation Guide

Installing your new 2006-2011 Lucerne BCM is a manageable job for a confident DIYer or any professional technician. In the Lucerne, the BCM is typically located behind the right side of the dashboard (glove box area).

Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow all systems to power down completely.
Access the Module: Remove the glove box assembly and any surrounding trim panels to gain clear access to the BCM. It will have several large electrical connectors attached.
Disconnect and Remove: Carefully unplug all electrical connectors from the old BCM. Note their orientation. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
Install the New BCM: Mount your new, pre-programmed BCM onto the bracket. Securely plug in all the electrical connectors, ensuring they click into place.
Reassemble and Reconnect: Reinstall the glove box and any trim panels you removed. Reconnect the negative battery terminal.
Post-Installation Checks: Start the vehicle and test all body functions—windows, locks, lights, radio, etc. Please see the important notes below regarding potential post-install procedures.

Important Post-Installation Information

While this BCM is programmed to your VIN, some GM vehicles require a final handshake between modules after installation. Be aware of the following:

Airbag System Sync: If the airbag warning light is illuminated after installation, a procedure called “Setup SDM Primary Key in BCM” must be performed with a professional-grade scan tool to sync the new BCM with the airbag system.
Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light and traction control operation. This also requires a capable scan tool.
No Core Charge: You can keep your old module, as there is no core charge or need to return it.

Verified Vehicle Compatibility

This Body Control Module is a direct replacement for part number 15921353 and a wide range of other interchangeable part numbers. It fits numerous GM vehicles, though the mounting location may vary. Always verify the part number on your original module before ordering.

This module fits the following vehicles (and many more):

ACADIA 07-12 (LH dash)

BUICK LUCERNE 06-11 (right side dash)

CADILLAC DTS 06-11 (RH center dash)

CHEVROLET IMPALA 06-12 (LH dash)

CHEVROLET TAHOE 10 (under steering column)

CHEVROLET TRAVERSE 09-12 (LH dash)

EXPRESS/SAVANA VANS 08-12 (center dash)

GMC YUKON 10 (under steering column)

HUMMER H2 08-09 (LH firewall)

…and many others listed in the original fitment data.