Restore Full Functionality to Your GM Truck or SUV
Is your 2015 Sierra plagued by baffling electrical problems? One minute the power windows work, the next they don’t. Maybe your radio is acting possessed, or worse, the truck won’t start at all. As a technician with over two decades of experience, I’ve seen these exact issues hundreds of times, and they almost always point to a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s electronics, controlling everything from interior lights and door locks to security systems and communication between other modules. When it fails, it creates chaos.
Forget expensive dealership visits, towing fees, and the headache of programming a new module from scratch. We offer a simple, reliable solution. This is a replacement BCM that comes pre-programmed with your vehicle’s exact data. The process is easy: you purchase this service, send us your original BCM, and we meticulously transfer all the critical information—including VIN, mileage, and key data—to this fully tested replacement unit. We then ship it back to you, ready for a plug-and-play installation. It’s the most efficient way to get your truck back to 100% without the dealership hassle.
Is Your Sierra Showing These BCM Failure Signs?
A failing BCM can manifest in numerous ways, often starting as intermittent annoyances before becoming major problems. If you’re experiencing any of the following, a faulty BCM is the likely culprit:
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or failing to turn on.
- ✔ The security system engaging randomly, preventing the vehicle from starting (anti-theft light flashing).
- ✔ Inaccurate or non-functional gauges on the instrument cluster.
- ✔ The radio or infotainment system turning on and off by itself.
- ✔ Communication error codes stored, such as U0140 (Lost Communication With Body Control Module).
- ✔ A vehicle that cranks but refuses to start.
A Technician’s Notebook: The Ghost in the Machine
A customer brought in a 2015 Sierra 1500 with a truly frustrating problem. The truck would randomly fail to start, but only in the mornings. By the time the tow truck got it to my shop, it would fire right up. We checked the battery, starter, and alternator—all perfect. No codes were stored initially. I decided to keep it overnight. The next morning, sure enough, it wouldn’t start, and the anti-theft light was blinking. This time, I caught a U0140 code. The BCM wasn’t waking up properly in the cold, preventing it from authorizing the ignition. By cloning his original module’s data onto a replacement unit, we solved the “ghost” that had been haunting him for months. This service provides that same definitive fix.
The Smart Solution for Your 2015 Sierra BCM
Our cloning service is designed to be the most straightforward path to repair. By transferring the data from your original module, we ensure the replacement BCM is a perfect digital match for your truck. This preserves your key programming and vehicle-specific settings, making the installation process as simple as swapping the part. There is no core charge, so you can keep your original module.
Your Straightforward BCM Installation Guide
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- ✔ Locate the BCM: On most 2015 Sierra and Silverado models, the BCM is located under the steering column, on the driver’s side of the dashboard. Consult a service manual for the exact location on other compatible models.
- ✔ Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that must be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Mount your pre-programmed replacement BCM and securely plug in all the electrical connectors. Ensure they click into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all body functions—windows, locks, lights, radio, etc.—to confirm the repair is successful.
Important Post-Installation Notes
In some cases, additional synchronization 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 airbag system with the new BCM.
- Brake Pedal Position Relearn: To ensure proper brake light and traction control operation, a brake pedal position sensor relearn might be necessary, which also requires a capable diagnostic tool.
Verified Fitment For These GM Models
This BCM is a direct-fit replacement for units with part numbers 13592137, 13506935, 13506936, 13587704, or 13594764. It is compatible with a wide range of vehicles. Please verify your part number and check the list below to ensure proper fitment.
- 2015 Cadillac ATS: Body Control (BCM); (on firewall)
- 2015-2016 Cadillac CTS: Body Control (BCM); (LH dash)
- 2015 Cadillac Escalade & ESV: Body Control (BCM); (under steering column)
- 2015 Cadillac XTS: Body Control (BCM); (left front hinge pillar)
- 2015 Chevrolet Corvette: Body Control (BCM); (LH dash)
- 2015-2016 Chevrolet Impala: Body Control (BCM); VIN 1 (New Style), (LH dash)
- 2015 Chevrolet Silverado 1500/2500/3500: Body Control (BCM); (under steering column)
- 2015-2018 Chevrolet Sonic: Body Control (BCM); (RH rear quarter panel)
- 2015 Chevrolet Suburban 1500: Body Control (BCM); (under steering column)
- 2015 Chevrolet Tahoe: Body Control (BCM); (under steering column)
- 2015 GMC Sierra 1500/2500/3500 (incl. Denali): Body Control (BCM); (under steering column or LH firewall)
- 2015 GMC Yukon & Yukon XL 1500: Body Control (BCM); (under steering column)
Frequently Asked Questions
How does the programming service work?
It’s simple. After you place your order, we will contact you with instructions to ship your original BCM to us. Once we receive it, we transfer all the necessary data to the replacement module and ship it back to you, usually within 24-48 hours.
Do I need to have my keys reprogrammed?
No. Because we clone the data from your original module, the replacement BCM will recognize your existing keys. This saves you a significant amount of time and money compared to a dealership repair.
Is this a plug-and-play part?
Yes, for over 95% of installations. Once programmed with your vehicle’s data, you simply install it. In rare cases, as noted above, an airbag sync or brake pedal relearn may be needed, which requires a professional scan tool.
What if my original BCM is completely dead or missing?
Our cloning service requires a readable original module. If your BCM is water-damaged, burnt, or physically broken, please contact us before ordering to discuss potential recovery options.
Why is this better than buying a used BCM from a junkyard?
A used BCM from another vehicle will have the wrong VIN and security information. It will not start your vehicle and would still require expensive and complex programming at a dealership. Our service eliminates that entire process.