Is Your 2015 Sierra Plagued by Electrical Gremlins?
If your 2015 GMC Sierra is experiencing bizarre electrical issues like flickering lights, malfunctioning power windows, a security system that acts on its own, or even a no-start condition, the culprit is often a failing Body Control Module (BCM). The BCM is the central nervous system for your truck’s body electronics, managing everything from interior lighting and door locks to the anti-theft system. When it fails, it can create a cascade of frustrating and seemingly unrelated problems.
We had a 2015 Silverado come in with a classic parasitic draw. The owner had replaced the battery twice, but it would still be dead every few mornings. Standard tests weren’t revealing the source. After digging into the network data, we noticed the BCM wasn’t allowing other modules to go to sleep properly. It was keeping the network ‘awake’ all night, slowly draining the battery. A replacement BCM, cloned with the original’s data, solved the problem instantly. It’s a perfect example of how a faulty BCM can manifest as a completely different issue.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ Interior or exterior lights staying on, flickering, or not turning on.
- ✔ Erroneous warning lights on the dashboard (e.g., ‘Service Theft System’).
- ✔ Key fob not being recognized or working intermittently.
- ✔ Engine cranks but refuses to start due to security system confusion.
- ✔ Unexplained battery drain leading to a dead battery overnight.
The Simple, No-Dealer-Visit Solution
Don’t let a faulty BCM keep your truck off the road or force you into an expensive and time-consuming visit to the dealership. Our service provides you with a fully programmed replacement 2015 Sierra Body Control Module that is ready for installation right out of the box. We achieve this through a professional cloning process that transfers all the critical vehicle-specific data from your original BCM to the replacement unit.
How Our Programming Service Works:
- ✔ Place Your Order: Complete your purchase through our secure checkout.
- ✔ Ship Us Your Original BCM: We will contact you with simple shipping instructions. Carefully package your original BCM and send it to our facility.
- ✔ We Clone Your Data: Upon arrival, our technicians will perform a full data transfer from your original module to the replacement unit. This includes VIN, mileage, key data, and other vehicle-specific settings.
- ✔ Receive Your Plug-and-Play BCM: We ship the newly programmed BCM back to you, typically within 1-2 business days. You’ll receive tracking information as soon as it’s on its way.
Post-Installation Information
Because this module is a direct clone of your original, installation is straightforward. Simply disconnect the battery, remove the old BCM (typically located under the steering column), and install the new one. However, in some GM vehicles, certain systems may require a quick sync procedure after the new module is installed.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool and syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light operation and traction control function.
Always consult a factory service manual or a qualified technician if you are unsure about any part of the installation process.
Guaranteed Fitment for Your Vehicle
This 2015 Sierra Body Control Module is a direct replacement for several part numbers, ensuring compatibility. Please verify that your original module’s part number is on this list:
Compatible Part Numbers: 13592137, 13506935, 13506936, 13587704, 13594764
This BCM fits a wide range of 2015 and newer GM trucks, SUVs, and cars, including the GMC Sierra 1500/2500/3500, Chevrolet Silverado 1500/2500/3500, Tahoe, Suburban, Cadillac Escalade, CTS, ATS, and more. Please refer to the detailed fitment list to confirm compatibility with your specific model and options.
Frequently Asked Questions
What exactly does a Body Control Module (BCM) do?
The BCM is a computer that controls and monitors most of your vehicle’s non-engine-related electronic functions. This includes power windows, door locks, interior and exterior lighting, the security system, and communication between various other modules in the vehicle.
How does this programming service work?
You purchase this service and then ship your original BCM to us. We extract the unique data from your module—like the VIN and key information—and flash it onto the replacement unit. This makes the replacement BCM an exact electronic copy of your original, ensuring it works seamlessly with your vehicle.
Is this BCM truly plug-and-play?
Yes, in 99% of cases. Because we clone your original data, the vehicle will recognize the new module as its own, eliminating the need for dealership programming. In rare cases, a simple relearn procedure, like for the airbag system, may be required as noted in the description.
What happens if I can’t send my original BCM?
This specific service requires your original module to perform the data clone. If your original module is lost or completely destroyed, please contact us, as we may have other options available.
How long does the entire process take?
Once we receive your original BCM, our programming service typically takes 1-2 business days. The total time will depend on shipping times to and from our facility. We will ship the programmed module back to you promptly and provide tracking.