Restore Full Electrical Function to Your GM Vehicle
Dealing with bizarre electrical problems in your 2014-2016 Buick LaCrosse, Malibu, or Regal? Flickering lights, malfunctioning power windows, or a security system that acts up on its own are classic signs of a failing Body Control Module (BCM). As the central hub for your car’s body electronics, a faulty BCM can create a cascade of frustrating and unpredictable issues. This isn’t just an inconvenience; it can affect vehicle safety and reliability. I’ve seen countless vehicles in my bay with these exact symptoms, where owners have spent hundreds chasing down individual component faults, only to find the BCM was the root cause all along.
We offer a straightforward and reliable solution. This is a replacement LaCrosse Body Control Module that comes fully programmed using the data from your original unit. This cloning service eliminates the need for expensive trips to the dealership for programming with a proprietary scan tool. The process is simple: you purchase this service, ship your original BCM to us, and we transfer all the critical vehicle-specific information to this quality replacement module. We then ship it back to you, ready for a true plug-and-play installation.
Common Signs of a Failing BCM
If you’re experiencing any of the following, a failing BCM is the likely culprit. A proper diagnosis is key, but these symptoms are strong indicators that your module needs attention. Look out for communication-related Diagnostic Trouble Codes (DTCs), often in the U-series (e.g., U0140, U0155).
- ✔ Erratic or non-functional interior and exterior lights (headlights, dome lights, dash lights).
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The anti-theft or security system engaging randomly, preventing the car from starting.
- ✔ Horn honking unexpectedly or the key fob losing its connection.
- ✔ Warning messages on the instrument cluster, such as “Service Theft Deterrent System.”
- ✔ Complete loss of communication, leading to a no-start condition.
From the Diagnostic Bay: The Case of the Haunted Malibu
A customer brought in a 2015 Malibu with a list of complaints that sounded like a ghost was in the machine. The radio would turn on and off, the driver’s side window wouldn’t go down, and occasionally, the car wouldn’t start, showing a security light on the dash. They had already replaced the window switch and the battery. My scan tool showed multiple lost communication codes with various modules. Instead of chasing each individual symptom, experience pointed me directly to the BCM. After confirming power and ground to the module were good, we tested the communication network and found the BCM was erratically dropping off. A cloned LaCrosse Body Control Module (the same part family) had the car fixed and back to the customer the next day—no more ghosts, just reliable operation.
Your Straightforward BCM Installation Guide
Once you receive your programmed module from us, installation is simple. For the 2014-2016 LaCrosse, the BCM is typically located behind the driver’s side (LH) kick panel. Always verify the location for your specific model.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Access the Module: Carefully remove the trim and kick panel on the driver’s side to expose the BCM. It’s a black box with several large electrical connectors.
- Disconnect and Remove: Take a photo of the connector positions for reference. Carefully release the locking tabs on each electrical connector and unplug them from the old BCM. Remove any bolts or clips holding the module in place and take it out.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Reconnect all electrical connectors firmly until they click into place.
- Final Steps: Reinstall the kick panel and any trim pieces you removed. Reconnect the negative battery terminal. Start the vehicle and test all functions—lights, locks, windows, etc.
Post-Installation Checks
Our programming service handles the critical data transfer, but some vehicle systems may require a handshake with the new BCM. Please be aware of the following:
- Airbag System Sync: If the 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 correct brake light operation and traction control functionality.
Disclaimer: We offer this guidance based on years of experience. However, always consult a factory service manual for your specific vehicle for detailed procedures and torque specs.
Verified Compatibility for Your Vehicle
This programming service and replacement module are compatible with a range of GM vehicles. Please verify your original part number is on this list. The module’s physical location varies by model as noted below.
Interchangeable Part Numbers: 13580698, 13578458, 13589115, 13589637, 13590173, 13590851, 13591300, 13592376, 13593775, 13593776, 13594564
Compatible Models:
- 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)
- Cadillac SRX 2014-2016: (LH dash)
- Chevrolet Camaro 2014-2015: (RH dash)
- Chevrolet Malibu 2014-2015: (LH kick panel)
- Chevrolet Malibu 2016: VIN 1 (Limited), (LH kick panel)
- Chevrolet Spark 2014-2016: Electric (EV), (left lower A-pillar)
- Chevrolet Volt 2014-2015: (RH engine compartment)
Frequently Asked Questions
How does this mail-in programming service work?
It’s simple. After your purchase, we will contact you with instructions to ship your original BCM to our facility. Once we receive it, our technicians will transfer the vehicle-specific data to the replacement module and ship it back to you, typically within 1-2 business days.
Why is cloning my original BCM better than installing a blank one?
Cloning transfers your car’s unique VIN, security information, and specific options. This makes the replacement module plug-and-play, avoiding the need for expensive and complex programming at a dealership, which is required for a new, blank module.
Where is the BCM on my 2014 LaCrosse?
On the 2014-2016 Buick LaCrosse, the Body Control Module is located behind the driver’s side (left-hand) kick panel, near the interior fuse box area.
Do I need to send my keys with the module?
No, you do not need to send your keys. All the necessary immobilizer and security data is stored within the BCM itself, which is what we transfer during the cloning process.
What if my original BCM is completely dead or not communicating?
In many cases, even if the BCM is failing, we can still extract the necessary data from the memory chip. If we are unable to retrieve the data, we will contact you to discuss other options.
Is there a core charge for this part?
No, there is no core charge. Our service involves programming a replacement module for you. You are welcome to keep your original, non-functional module.