If you’re dealing with the baffling and frustrating electrical issues that plague a failing Body Control Module (BCM) in your 2015 GMC Sierra or other compatible GM vehicle, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a bad BCM can turn a reliable truck into a source of constant headaches—from lights that flicker for no reason to a vehicle that refuses to start. This isn’t just an inconvenience; it can be a major disruption to your work and daily life.
Forget the expensive dealership visits, towing fees, and complex on-vehicle programming. We offer a straightforward and reliable solution. This listing is for a replacement BCM that comes pre-programmed with your vehicle’s exact data. The process is simple: you purchase this module, ship your original BCM to us, and we handle the complex part. We will clone the vital information—like your VIN and specific vehicle options—from your original unit to this replacement. We then ship the ready-to-install module back to you, making the final repair as simple as swapping the part. This ensures seamless integration and functionality, just like the original.
Is Your Truck Showing These Symptoms?
A failing BCM is the central nervous system for your vehicle’s electronics, and when it goes bad, the symptoms can be widespread and seem unrelated. Here’s what I often see in the shop:
- ✔ Intermittent or non-functional power windows, locks, and mirrors.
- ✔ Dashboard lights flickering, dimming, or staying on unexpectedly.
- ✔ The security system acting erratically or preventing the engine from starting (Security light on).
- ✔ Horn blaring or wipers activating on their own.
- ✔ Inconsistent radio or climate control operation.
- ✔ Communication error codes, such as U0100, U0140, or other ‘U’ codes, indicating a loss of communication with other modules.
- ✔ A complete no-start condition where the starter doesn’t even engage.
From the Diagnostic Bay: The Case of the Haunted Sierra
A customer brought in his 2015 Sierra 1500, convinced it was possessed. The horn would honk randomly in his driveway, the interior lights would pulse, and some mornings, it just wouldn’t start. He’d already replaced the battery and checked the main grounds. After hooking up my scan tool, I saw a dozen intermittent communication codes across multiple systems, all pointing back to one culprit. The BCM was failing internally, sending corrupt data across the CAN bus network. Instead of a complicated rewiring job, the fix was a properly programmed BCM. This is a classic example of how a single module can cause chaos, and why a correctly programmed replacement is critical.
Your Straightforward Guide to Installation
Once you receive your pre-programmed module from us, the final step is simple. On most 2015 Sierra and Silverado models, the BCM is located under the driver’s side of the dashboard, near the steering column. While exact steps can vary, here is a general guide:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: Remove any necessary lower dash panels to access the module. It’s typically a black box with multiple large electrical connectors.
- Disconnect and Remove: Carefully unplug all wiring harnesses 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 Module: Mount your new, pre-programmed BCM in the same location. Securely plug in all the wiring harnesses, making sure they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, radio, etc.—to confirm the repair was successful.
Important Post-Installation Notes
Our programming service handles the critical data transfer, but some GM vehicles require a final handshake between modules after installation. Be aware of the following:
- Airbag System Sync: If your airbag warning light is on after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure may be needed. This requires a professional-grade scan tool to sync the modules and clear the light.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn might be necessary for proper brake light and traction control operation. This is also performed with a scan tool.
- No Core Charge: You are not required to return your old BCM to us. There is no core charge associated with this purchase.
Disclaimer: Always consult a factory service manual or a qualified technician for procedures specific to your vehicle’s exact model and options.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 13592137, 13506935, 13506936, 13587704, and 13594764. It is guaranteed to fit the following vehicles:
Cadillac: ATS (2015-16), CTS (2015-16), Escalade / ESV (2015), XTS (2015)
Chevrolet: Corvette (2015), Impala (2015-16), Silverado 1500/2500/3500 (2015), Sonic (2015-18), Suburban 1500 (2015), Tahoe (2015)
GMC: Sierra 1500/2500/3500 (2015), Sierra Denali 1500/2500/3500 (2015), Yukon / Yukon XL 1500 (2015)
Please verify your part number and check the specific notes in the fitment chart to ensure a perfect match for your vehicle.
Frequently Asked Questions
How does this mail-in programming service work?
It’s simple. After you complete your purchase, we will contact you with instructions for shipping your original BCM to our facility. Once we receive it, our technicians will transfer the necessary programming and security data to the replacement module. We then ship the ready-to-install BCM back to you, typically within 1-2 business days.
Is this BCM truly plug-and-play?
Yes, because we clone the data from your original module, the replacement BCM will be plug-and-play regarding security, VIN, and vehicle options. This eliminates the need for dealer programming. However, as noted, some vehicles may require a minor relearn procedure (like for the airbag or brake pedal sensor) with a scan tool after installation.
What if my part number is not listed but my vehicle is?
It is critical to match the part number. While this BCM fits many vehicles, GM uses different modules with subtle hardware and software variations. Please match one of the compatible part numbers (13592137, 13506935, etc.) from your original module to guarantee compatibility.
Where is the BCM located on a 2015 Sierra?
On the 2015 GMC Sierra and Chevy Silverado, the Body Control Module is typically mounted under the driver-side dashboard, to the left of the steering column. You may need to remove the lower dash trim panel for access.
How long does the whole process take?
We program and ship the module back to you within 1-2 business days of receiving your original BCM. The total time will depend on the shipping speed you choose to send your module to us and the return shipping method.