Is Your 2015 Sierra Plagued by Electrical Gremlins?
The Body Control Module, or BCM, is the central nervous system for your truck’s electronic accessories. It doesn’t control the engine, but it manages nearly everything else: your power windows, door locks, interior and exterior lighting, security system, and even the instrument cluster. When the BCM starts to fail in a 2015 GMC Sierra, it can create a host of bizarre and frustrating symptoms that seem unrelated, making diagnosis a nightmare for the uninitiated. From flickering lights to a security system that won’t disarm, a faulty BCM can make your reliable truck feel unpredictable and unsafe.
From the Diagnostic Bay
We had a 2015 Sierra 1500 in the shop last month that was driving its owner crazy. The dome lights would randomly stay on, the driver’s side window would only work intermittently, and the radio would sometimes refuse to turn off after the key was removed. The owner had already replaced the window switch and checked every fuse he could find. After hooking up our professional scan tool, we saw a flood of communication errors pointing directly to the BCM. Instead of sending him to a dealership for a costly new module and programming, we performed a cloning service just like this one. We transferred the data from his original, failing BCM to a replacement unit. He had his truck back the next day, fully functional, with no further issues and for a fraction of the dealer’s quote.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Interior or exterior lights (headlights, taillights, dome lights) behaving erratically.
- ✔ The security system or keyless entry failing to work correctly.
- ✔ Warning lights appearing on the dashboard for no apparent reason.
- ✔ The horn honking randomly or not working at all.
- ✔ Wipers activating on their own or not responding to the switch.
- ✔ Significant battery drain when the vehicle is turned off.
The Simple, No-Hassle Solution: Our BCM Programming Service
Don’t let a dealership charge you a fortune for a new module and several hours of programming fees. Our service is designed to be the most straightforward and cost-effective solution available. We take the vital, vehicle-specific data from your original BCM—including key programming, security information, and optional feature settings—and perfectly clone it to a replacement unit. The result is a true plug-and-play module. Once you receive it back from us, you simply install it, and your truck’s electronics are restored to their original factory condition. There’s no need for additional trips to a mechanic or dealer for expensive calibration.
How The Process Works:
- ✔ Place Your Order: Complete your purchase through our secure checkout.
- ✔ We Contact You: We will reach out with clear, simple instructions for shipping your original BCM to our facility.
- ✔ We Program Your Module: Once we receive your original BCM, our expert technicians will transfer all necessary data to the replacement module within 1-2 business days.
- ✔ We Ship It Back: We ship your newly programmed BCM back to you with tracking information. Installation is as simple as removing the old unit and plugging in the new one.
Post-Installation Checks for Your 2015 Sierra BCM
In most cases, the installation is completely plug-and-play. However, due to the complex integration of modern vehicle systems, a couple of minor procedures may be necessary after installation. Please note the following:
- Airbag System Sync: If you see an airbag warning light after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure is required. This syncs the new BCM with the airbag system and can be performed with a professional-grade diagnostic tool.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be needed to ensure your brake lights and traction control system function perfectly.
Always consult a factory service manual or a qualified technician if you are unsure about any post-installation steps.
This module is a direct replacement for part numbers: 13592137, 13506935, 13506936, 13587704, and 13594764, and fits a wide range of GM vehicles including the Sierra, Silverado, Tahoe, Suburban, Escalade, and more. Please verify the part number and check the detailed fitment list to ensure compatibility.
Frequently Asked Questions
What exactly is a BCM cloning service?
We extract the unique software and security data from your original BCM and flash it onto a replacement unit. This makes the replacement module an exact electronic copy of your original, ensuring it works with your vehicle’s keys and systems without any additional programming.
Why can’t I just buy a used BCM and install it?
A used BCM is programmed to a different vehicle. When installed in your truck, it won’t recognize your keys or security settings, and your vehicle will not start. Our cloning service solves this by making the replacement module specific to your truck.
How long does the programming service take?
Once we receive your original module, our technicians typically complete the cloning process within 24-48 hours. We then ship the programmed replacement BCM back to you.
Is this difficult to install myself?
The BCM is typically located under the steering column. Physical installation is straightforward for someone with basic mechanical skills: disconnect the battery, remove a few trim panels, and unplug the electrical connectors. Our service eliminates the difficult software and programming part of the job.
What if my original BCM is completely dead or missing?
If your original BCM is non-communicative or lost, a cloning service is not possible. In these rare cases, please contact us directly to discuss alternative solutions we may be able to provide.