Tired of Your Car’s Electrical Gremlins?
Is your 2015-2016 Chevrolet Impala acting possessed? One minute the power windows work, the next they don’t. The security light is on, the radio is acting up, or you’re seeing a cascade of random warning lights on your dash. Before you start tearing apart wiring harnesses, the culprit is often the Body Control Module (BCM). As the central hub for your vehicle’s body electronics, when the BCM fails, it creates chaos. This isn’t just an annoyance; it can affect vehicle security and safety systems.
From the Diagnostic Bay: The Case of the Confused Cadillac
I once had a 2015 Cadillac XTS in my bay that was driving the owner crazy. The interior lights would flicker, the key fob would work intermittently, and the car sometimes refused to start. The owner had already replaced the battery and checked the main grounds. After hooking up my scan tool, I saw a dozen communication codes (U-codes) pointing to a network failure. Instead of a complex wiring issue, the root cause was a failing BCM. It was intermittently dropping communication with other modules. By replacing it with a properly cloned unit, we restored full functionality in an afternoon, saving the customer from an expensive and lengthy diagnostic nightmare at the dealership. This is a classic BCM failure scenario.
How Our Simple Mail-In Programming Service Works
The biggest headache with replacing a BCM isn’t the physical install—it’s the complex and expensive programming required to make it work with your specific vehicle. We eliminate that problem entirely. Our service provides you with a replacement BCM that is a direct, plug-and-play solution. We handle the technical part for you. The process is simple:
- Place Your Order: After you purchase, we will contact you with clear instructions for the next steps. Please ensure your contact information is accurate.
- Ship Us Your Original BCM: You will need to remove your original BCM and ship it to our facility.
- We Clone Your Data: Our expert technicians will transfer all the critical data—including your vehicle’s VIN, mileage, and specific electronic options—from your original module to the replacement unit.
- We Ship It Back: We ship the fully programmed, ready-to-install BCM back to you, typically within one business day of receiving your original. You’ll get a tracking number so you know exactly when it’s coming.
This process ensures 100% compatibility and avoids any need for a trip to the dealer for programming. Plus, there is no core charge; you can keep your original module.
Common Signs of a Failing BCM
- ✔ Power windows, door locks, or interior lights operating erratically or not at all.
- ✔ The anti-theft or security light stays on, preventing the car from starting.
- ✔ The horn honks randomly or the alarm goes off without reason.
- ✔ Problems with the instrument cluster, such as gauges not working or displaying incorrect information.
- ✔ Wipers or turn signals functioning intermittently.
- ✔ Communication error codes, often in the U-series (e.g., U0140, U0100), stored in the system.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any work on the electrical system.
- ✔ Locate Your BCM: On the 2015-2016 Impala, the BCM is typically located on the left-hand (driver’s side) of the dashboard. For other models, its location can vary (see fitment list below). Consult a service manual if you’re unsure.
- ✔ Remove the Old Module: Carefully disconnect the electrical connectors. They have locking tabs that need to be released. Then, unbolt the module from its mounting bracket.
- ✔ Mail It In: Package your original BCM securely and ship it to us using the instructions we provide.
- ✔ Install the New Module: Once you receive the programmed BCM from us, simply mount it in place and reconnect the electrical connectors. Ensure they click securely into place.
- ✔ Reconnect the Battery: Reattach the negative battery terminal. Your vehicle should now start and function correctly with the new BCM.
Important Post-Installation Notes
In some cases, additional steps may be required 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 new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure proper brake light and traction control operation.
- Disclaimer: Procedures can vary. We always recommend consulting a factory service manual or a qualified technician for your specific vehicle.
Verified Vehicle Compatibility
This BCM, part number 13587704, is a direct replacement for part numbers 13592137, 13506935, 13506936, and 13594764. It fits the following GM vehicles:
- 2015-2016 Chevrolet Impala (VIN 1, New Style, LH dash)
- 2015-2016 Cadillac CTS (Sdn, LH dash)
- 2015-2016 Cadillac ATS (On firewall)
- 2015 Cadillac XTS (Left front hinge pillar)
- 2015 Chevrolet Corvette (LH dash)
- 2015-2018 Chevrolet Sonic (RH rear quarter panel)
- 2015 Chevrolet Silverado 1500, 2500, 3500 (Under steering column)
- 2015 GMC Sierra 1500, 2500, 3500 (Under steering column / LH firewall)
- 2015 GMC Sierra Denali 1500, 2500, 3500 (Under steering column)
- 2015 Chevrolet Suburban 1500 / Tahoe (Under steering column)
- 2015 Cadillac Escalade / Escalade ESV (Under steering column)
- 2015 GMC Yukon / Yukon XL 1500 (Under steering column)
Please verify your part number and vehicle options to ensure compatibility.
Frequently Asked Questions
What exactly is a ‘cloning’ or ‘programming’ service?
This service transfers all the essential software and vehicle-specific data (like VIN and options) from your original BCM to our replacement unit. This makes the new module a perfect electronic match for your car, so it works right out of the box without needing a dealer’s computer.
Do I have to pay a core charge?
No. There is absolutely no core charge for this part. We only need your original module to perform the data transfer service.
How long does the entire process take?
Once we receive your original BCM, we typically program and ship the replacement unit back to you within one business day. Total turnaround time will depend on shipping times to and from our facility.
Is this something I can install myself?
Yes, this is a great job for a confident DIYer. The physical removal and installation of the BCM is straightforward on most models. Since we handle all the programming, you won’t need any special electronic tools for the installation itself.
What if my original BCM is completely dead or not communicating?
In most cases, even if the BCM has failed, we can still extract the necessary data. If your module has suffered extreme physical damage (fire, flood, etc.), please contact us before ordering to discuss options.