If you’re dealing with baffling electrical issues in your Buick LaCrosse or other compatible GM vehicle, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable car into a source of constant frustration. It’s the vehicle’s central command center for all body-related electronics—from your power windows and door locks to the interior lights and security system. When it starts to fail, the symptoms can be unpredictable and confusing.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We offer a professional programming service for this genuine OEM 2014-2016 LaCrosse BCM. The process is simple: you purchase this module, send us your vehicle’s original BCM, and we transfer all the critical, vehicle-specific data to this replacement unit. We then ship the fully programmed module back to you, ready for installation. This cloning service means you can bypass expensive dealership programming fees and lengthy wait times. It’s the most efficient way to get your car back to 100% functionality.
Is Your LaCrosse Showing These Symptoms?
- ✔️ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔️ Interior or exterior lights flickering, staying on, or not turning on.
- ✔️ The security system engaging randomly or the key fob not working correctly.
- ✔️ False warning lights on the dashboard, such as a persistent airbag or service traction system message.
- ✔️ Communication error codes (U-codes) stored in the system when scanned.
- ✔️ The vehicle intermittently fails to start, even with a good battery and starter.
From the Diagnostic Bay
I remember a 2015 Buick Regal that came into my shop with a laundry list of complaints. The owner said the radio would randomly shut off, the dome light would flicker while driving, and sometimes the car wouldn’t recognize the key fob. He’d already replaced the battery with no luck. A full diagnostic scan showed multiple communication faults pointing to the BCM. Instead of a costly new module and a trip to the dealer for programming, we used this exact cloning service. We had the programmed replacement BCM back in a couple of days, installed it in under 30 minutes, and every single electrical gremlin was gone. The customer saved hundreds of dollars and a major headache.
Your Straightforward BCM Installation Guide
Installing your newly programmed 2014-2016 LaCrosse BCM is a direct swap. While the exact location varies by model (see fitment list), the process is generally the same.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most LaCrosse and Malibu models, it’s behind the driver’s side (LH) kick panel. For other models like the Volt or SRX, it may be in the engine compartment or under the dash. Refer to your vehicle’s service manual for the precise location.
- 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 Module: Mount the replacement BCM in the same position and securely reconnect all electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Post-Install Checks: Start the vehicle and test all body functions—windows, locks, lights, radio, etc. Note that some vehicles may require the additional procedures listed below.
Important Post-Installation Notes
While our programming makes this a near plug-and-play repair, some vehicle systems may need to be re-synced after installation:
- 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 BCM with the airbag module.
- Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn may be required to ensure the brake lights and traction control system function correctly.
Disclaimer: Always consult a factory service manual or a qualified technician for procedures specific to your vehicle.
Verified Vehicle Compatibility List
This module is a direct fit for the following vehicles and part numbers. Please verify your part number (13580698) or one of the interchangeable numbers listed below.
Interchangeable Part Numbers: 13578458, 13589115, 13589637, 13590173, 13590851, 13591300, 13592376, 13593775, 13593776, 13594564
- Buick LaCrosse: 2014-2015 (LH kick panel)
- Buick LaCrosse: 2016 (LH kick panel, ID 13580698 or 13594564)
- Buick Regal: 2014-2017 (LH dash)
- Cadillac ELR: 2014-2016 (RH cowl) / 2016 (Communication; RH engine compartment)
- Cadillac SRX: 2014-2016 (LH dash)
- Chevrolet Camaro: 2014 (Conv, RH dash), 2015 (RH dash)
- Chevrolet Malibu: 2014-2015 (LH kick panel)
- Chevrolet Malibu Limited: 2016 (VIN 1, LH kick panel)
- Chevrolet Spark EV: 2014-2016 (Electric model, left lower a-pillar)
- Chevrolet Volt: 2014-2015 (RH engine compartment)