If your 2015 GMC Sierra or other compatible GM vehicle is acting possessed, you’ve likely come to the right place. As a technician with over two decades of experience, I’ve seen it all: dash lights flickering like a disco, power windows with a mind of their own, the horn blaring randomly, or a truck that simply refuses to start. These aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM), the central nervous system for your vehicle’s electronics.
The BCM manages everything from your interior lights and power locks to the security system and communication between other vital modules. When it fails, chaos ensues. Traditionally, a replacement meant a costly trip to the dealership for the part, installation, and—most importantly—expensive programming. Without programming, a new module is just a plastic box. Our solution eliminates that expensive and time-consuming final step.
The Smart, Simple Solution: Pre-Programmed for You
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a fully tested, reliable BCM and transfer the specific data from your vehicle’s original module directly onto it. This cloning process makes the replacement module a perfect digital twin of your old one, ensuring it communicates seamlessly with your truck’s existing systems. The result? You get a part that is truly plug-and-play, saving you hundreds of dollars and the headache of scheduling a dealership appointment.
Case Study: A Tricky Diagnosis
A 2015 Sierra 1500 came into my shop last month with a bizarre list of complaints. The owner said the radio would switch off, the driver’s side window wouldn’t roll down, and occasionally the anti-theft light would flash, preventing it from starting. There were no consistent trouble codes, just a generic U0140 (Lost Communication With Body Control Module) that would pop up intermittently. After verifying the power and ground circuits to the BCM were solid, we knew the module itself was failing internally. Instead of a multi-day dealer affair, the owner chose our cloning service. We had his original BCM overnighted, programmed the replacement the day it arrived, and shipped it back. He installed it himself in under an hour and all the strange electrical gremlins were gone for good.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, your 2015 Sierra BCM is the likely culprit:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights staying on, flickering, or not working at all.
- ✔ The security system engaging randomly, causing a no-start condition.
- ✔ Horn or alarm sounding without reason.
- ✔ Inconsistent operation of the radio or infotainment system.
- ✔ Diagnostic trouble codes such as U0140, B1001, or other ‘U’ (network) codes.
- ✔ Warning lights on the dash for systems controlled by the BCM (e.g., airbags, service theft system).
A Straightforward Guide to Installation
Our cloning service makes the physical swap simple. Once you receive your programmed module, follow these general steps. The BCM in most Sierra/Silverado models is located under the driver’s side dash, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning work on any electrical components.
- Locate the BCM: On your 2015 Sierra, this is typically under the steering column. You may need to remove a lower dash panel for access.
- Disconnect Connectors: Carefully release the locking tabs on each electrical connector and pull them straight out from the module. Do not force them. Note their orientation for easier reinstallation.
- Remove the Old Module: Unfasten any bolts or clips holding the original BCM in place and remove it from the vehicle.
- Install the New Module: Seat your new, pre-programmed BCM in the mounting bracket and secure it. Reconnect all electrical connectors firmly until they click into place.
- Reconnect Battery: Reattach the negative battery terminal. Your vehicle’s core functions should now be restored.
Important Post-Installation Note: In some cases, additional relearn procedures may be required. For example, if the airbag light is on, a scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ function. A ‘Brake Pedal Position Relearn’ might also be necessary. Always consult a factory service manual or a qualified technician if you encounter any issues.
Verified Vehicle Compatibility
This BCM, part number 13506936, is a direct fit for a wide range of General Motors vehicles. Please match your original part number to one of the numbers below (13592137, 13506935, 13506936, 13587704, 13594764) and confirm your vehicle is on this list:
- ATS: 2015-2016 (on firewall)
- Corvette: 2015 (LH dash)
- CTS: 2015-2016 (Sdn, LH dash)
- Escalade / Escalade ESV: 2015 (under steering column, w/ opt AVF)
- Impala: 2015-2016 (VIN 1, New Style, LH dash)
- Sierra 1500 / Denali 1500: 2015 (under steering column)
- Silverado 1500: 2015 (under steering column)
- Sierra/Silverado 2500/3500: 2015 (under steering column or LH firewall, check ID)
- Sierra Denali 2500/3500: 2015 (under steering column, check ID)
- Sonic: 2015-2018 (RH rear quarter panel)
- Suburban 1500: 2015 (under steering column, w/ opt AVF)
- Tahoe: 2015 (under steering column, w/ opt AVF)
- XTS: 2015 (left front hinge pillar)
- Yukon / Yukon XL 1500: 2015 (under steering column, w/ opt AVF)
Frequently Asked Questions
How does the cloning process work?
After you place your order, we will provide instructions for shipping your original BCM to us. Once we receive it, our technicians will use specialized equipment to read the unique vehicle data and securely write it to the replacement module. We then ship the plug-and-play replacement back to you.
Do I need to send my keys?
No. Since we are cloning the data from your original module, which already recognizes your keys, you do not need to send them. The replacement module will work with your existing keys upon installation.
Is this a guaranteed fix for my problem?
This part will fix issues caused by a faulty BCM. While the symptoms listed are very common for BCM failure, we always recommend a proper diagnosis by a qualified mechanic to confirm the BCM is the root cause before ordering.
What if my original BCM is completely dead or ‘fried’?
In most cases, even if the BCM is not functioning in the vehicle, we can still recover the necessary data from the memory chip. If your module has severe physical damage (e.g., from fire or a major collision), please contact us first to discuss options.
What is the turnaround time?
We pride ourselves on a fast turnaround. The programming is typically completed and the module is shipped back out within 1-2 business days of us receiving your original BCM.
Is there a core charge?
No, there is no core charge for this service. You can keep your original module after we have completed the data transfer.