Restore Your Cadillac’s Brain and Banish Electrical Chaos
Is your 2015 Cadillac XTS acting possessed? Flickering lights, malfunctioning power windows, random security alerts, or a car that refuses to start can all point to a single culprit: a failing Body Control Module (BCM). As an ASE-certified technician with over two decades of experience, I’ve seen how a faulty BCM can turn a luxury vehicle into a source of constant frustration. The BCM is the central command for your car’s body electronics, managing everything from your interior lights and door locks to the anti-theft system. When it fails, chaos ensues.
Forget the exorbitant costs and scheduling headaches of a dealership visit. This is a hassle-free, mail-in programming service. You simply send us your original BCM, and we transfer all of its critical data—including VIN, mileage, and key programming—to this fully tested replacement module. The result? A true plug-and-play solution that gets your Cadillac back to its reliable, comfortable self without any need for expensive dealer-specific tools or programming.
Case Study: A Tricky Diagnosis
A customer brought in a ’15 XTS with a laundry list of bizarre, intermittent issues. The radio would sometimes not turn on, the passenger side power window worked only occasionally, and he’d get a random “Service Theft System” message. He’d already replaced the battery and checked fuses. On the surface, the problems seemed unrelated. However, after connecting my scan tool, I noticed communication loss codes (U-codes) pointing to the BCM. This is a classic sign. The module wasn’t completely dead, but internal board failures were causing it to drop communication with other modules, creating these ghost-like problems. By cloning his original BCM, we preserved all vehicle-specific settings and resolved every single issue in one go, saving him hundreds compared to the dealership quote.
Diagnosing a Faulty 2015 XTS Body Control Module
A failing BCM can manifest in numerous ways, often mimicking other problems. If you’re a DIY enthusiast or a professional mechanic trying to pinpoint the issue, this replacement 2015 XTS Body Control Module is the definitive fix for these symptoms. Before you start replacing individual switches or motors, check if your vehicle is exhibiting multiple issues from the list below, as this strongly indicates a central BCM failure.
Is Your Cadillac Showing These Electrical Faults?
- ✔ Power windows or door locks operate erratically or not at all.
- ✔ The anti-theft system engages randomly, preventing the car from starting (common DTC B2955).
- ✔ Interior or exterior lights (headlights, dome lights) flicker or fail to work.
- ✔ The dashboard displays false warnings or error messages.
- ✔ Key fobs are no longer recognized by the vehicle.
- ✔ Wipers or the horn activate without input.
- ✔ Communication loss with other modules, often setting U-series diagnostic trouble codes (e.g., U0140, U0155).
Your Straightforward BCM Installation Roadmap
Our cloning service makes the physical replacement simple. Once you receive the programmed module from us, follow these general steps. The BCM in the 2015 XTS is typically located in the left front hinge pillar area.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: Access the module by removing any necessary trim panels around the driver’s side lower dash or hinge pillar.
- Disconnect and Remove: Carefully unplug the electrical connectors from your old BCM. Note their orientation. Then, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical connectors.
- Reconnect Battery: Re-attach the negative battery terminal.
- Test Functionality: Start the car and test all body functions—windows, locks, lights, wipers, and key fobs—to confirm the repair.
Important Post-Installation Notes
In some cases, minor relearn procedures may be needed after installing the new BCM. These are typically straightforward:
- Airbag System Sync: If the airbag light is on after installation, a scan tool procedure called “Setup SDM Primary Key in BCM” is required to sync the systems. This is only necessary if the light appears.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure proper brake light and traction control operation.
- No Core Charge: You can keep your old module, as there is no core charge or need to return it.
Verified Compatibility for Your GM Vehicle
This BCM is a direct-fit solution for a wide range of GM vehicles. Please verify your part number is listed below. Our programming service ensures it works seamlessly with your specific model.
Replaces Part Numbers: 13592137, 13506935, 13506936, 13587704, 13594764
Fits Select Models Including:
- 2015 Cadillac XTS
- 2015-2016 Cadillac ATS
- 2015-2016 Cadillac CTS
- 2015 Chevrolet Corvette
- 2015-2016 Chevrolet Impala (New Style)
- 2015-2018 Chevrolet Sonic
- 2015 Chevrolet Silverado & GMC Sierra Trucks (1500/2500/3500)
- 2015 Chevrolet Suburban & Tahoe
- 2015 Cadillac Escalade & Escalade ESV
- 2015 GMC Yukon & Yukon XL
Always consult your vehicle’s service manual or a professional for specific location and procedure details. Fitment can vary based on options and specific IDs.
Frequently Asked Questions
How does the mail-in cloning service work?
After you purchase, we will contact you with instructions to ship your original BCM to us. Once we receive it, we extract the unique vehicle data and transfer it to the replacement module. We then ship the ready-to-install BCM back to you, typically within 1-2 business days.
Do I need to take my car to the dealer after installation?
No! The entire point of our service is to avoid dealer programming. Because we clone your original data, the new module is plug-and-play. In rare cases, a minor relearn procedure might be needed, but this does not require proprietary dealer software.
What if my original BCM is water damaged or won’t communicate?
In many cases, even with significant damage, we can still recover the necessary data. If for some reason the data is completely unrecoverable, we will contact you to discuss options and provide a full refund if we cannot proceed.
Is this a guaranteed fix for my vehicle’s problems?
This part is a guaranteed fix for a faulty BCM. It is crucial to properly diagnose the issue first. If your vehicle exhibits multiple symptoms from our list (erratic lights, locks, security issues), a failing BCM is the most likely cause. We cannot be responsible for misdiagnosis of other vehicle issues.
Will my mileage and keys work correctly?
Yes. Our cloning process transfers your vehicle’s exact mileage, VIN, and key fob information to the new module. Everything will function just as it did before the original BCM failed.
Where is the BCM located on my 2015 Cadillac XTS?
On the 2015 XTS, the Body Control Module is typically found inside the cabin, attached to the left front hinge pillar, often accessible by removing the lower driver-side dash trim panels.