Restore Full Functionality to Your GM Vehicle with a Perfectly Cloned BCM
Is your 2015 Sierra Denali 3500 or other compatible GM vehicle acting possessed? Flickering lights, intermittent power windows, a security system that randomly goes off, or a frustrating no-start condition are all classic signs of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s body electronics, and when it starts to fail, it can cause a cascade of confusing and unpredictable problems. In my 20+ years of automotive diagnostics, I’ve seen how a faulty BCM can turn a reliable truck into a source of daily frustration. Dealerships will quote you a fortune for a new module plus expensive programming fees. We offer a better, more affordable solution.
This is a comprehensive cloning service for a replacement BCM compatible with part number 13587704. You simply send us your original BCM, and our expert technicians will transfer all of your vehicle’s critical data—including the VIN, mileage, and specific options—to this fully tested replacement unit. We then ship it back to you, ready for a straightforward installation. This process eliminates the need for any additional programming or trips to the dealer, saving you significant time and money. It’s the most reliable way to get your vehicle’s electronics working like new again.
A Technician’s Notebook: The Case of the Haunted Sierra
A customer brought in his 2015 Sierra 2500 with a list of bizarre issues. The radio would turn on and off by itself, the dome light would flicker, and sometimes the truck wouldn’t recognize the key fob. He’d already replaced the battery and checked the grounds. After connecting my scan tool, I found multiple ‘U’ codes (U0140, U0155) indicating a loss of communication with the BCM. Instead of a complex and costly wiring chase, we started with the most likely culprit. We performed a BCM cloning service just like this one. After a 20-minute install, every single one of the ghost-like electrical problems was gone. It’s a testament to how central this one module is to the vehicle’s entire operation.
Signs Your GM Vehicle’s BCM is Failing
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, your Body Control Module is the likely cause:
- ✔ Power windows, locks, or mirrors not working or operating erratically.
- ✔ Interior or exterior lights flickering, staying on, or not turning on at all.
- ✔ The security system or alarm is falsely triggering.
- ✔ The vehicle won’t start, and the starter doesn’t engage (no-crank condition).
- ✔ Warning lights on the dashboard, such as the airbag or security light, are illuminated.
- ✔ Key fobs are not being recognized by the vehicle.
- ✔ Communication error codes stored in the system (e.g., U0140, U0100).
Your Straightforward BCM Installation Guide
Installing your pre-programmed BCM is a simple process. While the exact location varies slightly by model (see fitment list), the steps are generally the same.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On most Sierra/Silverado trucks, the BCM is located under the driver’s side of the dashboard, near the steering column. For other models, it may be on the firewall or in a kick panel.
- Disconnect and Remove: Carefully unplug all 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 BCM: Mount the replacement BCM in the same position and securely reconnect all the electrical connectors. You’ll hear a click as they lock into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Relearns (If Needed): Start the vehicle and check all functions. In some cases, as detailed below, an airbag system sync or brake pedal position relearn may be required using a professional scan tool if related warning lights appear.
Post-Installation Checks & Procedures
Our cloning service handles 99% of the work, but some vehicle systems may require a quick sync after installation:
- ✔ Airbag System Sync: If the airbag warning light is on after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the systems. This requires a professional-grade diagnostic tool.
- ✔ Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn may be necessary to ensure correct brake light and traction control operation.
- ✔ No Core Required: You do not need to send your old part back to us after the job is done. There is no core charge.
Disclaimer: Always consult your vehicle’s factory service manual or a qualified technician for procedures specific to your make and model.
Will This Fit My Vehicle?
This BCM cloning service is compatible with units matching part number 13587704 and other interchangeable numbers. It is a verified fit for the following GM models:
- Cadillac ATS: 2015, 2016
- Cadillac CTS: 2015, 2016
- Cadillac Escalade / ESV: 2015
- Cadillac XTS: 2015
- Chevrolet Corvette: 2015
- Chevrolet Impala: 2015-2016 (New Style)
- Chevrolet Silverado 1500 / 2500 / 3500: 2015
- Chevrolet Sonic: 2015-2018
- Chevrolet Suburban 1500: 2015
- Chevrolet Tahoe: 2015
- GMC Sierra 1500 / 2500 / 3500: 2015
- GMC Sierra Denali 1500 / 2500 / 3500: 2015
- GMC Yukon / Yukon XL 1500: 2015
This module also replaces part numbers: 13592137, 13506935, 13506936, and 13594764.
Frequently Asked Questions
How does the cloning service work?
After you place your order, we will provide you with instructions to ship your original BCM to us. Once we receive it, we extract the unique data and program it into the replacement module. We then ship the ready-to-install BCM back to you.
Do I need to get this programmed by a dealer?
No. The entire point of our service is to deliver a module that is already programmed for your specific vehicle. This completely avoids the need for expensive dealership programming.
Is this a simple plug-and-play installation?
Yes, for the most part. The physical installation is plug-and-play. In some rare cases, a ‘relearn’ procedure for the airbag or brake pedal sensor may be needed if a warning light appears, which requires a pro-level scan tool.
What happens if I install it and the airbag light comes on?
This means the new BCM needs to be synced with the airbag system’s SDM. A mechanic with a capable scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
How do I know if my BCM is the problem?
Multiple, unrelated electrical issues are the biggest clue. Things like power locks, windows, lights, and the radio acting up simultaneously often point directly to a faulty BCM. A diagnostic scan for communication codes (U-codes) can also help confirm it.
Is there a core charge for this part?
No, there is absolutely no core charge. You can keep your original module after the service is complete.