Solve Your Truck’s Electrical Headaches with a Programmed BCM
If you’re dealing with bizarre electrical problems in your 2015 GMC Sierra—like power windows with a mind of their own, flickering interior lights, a security system that won’t disarm, or a dashboard lit up with warning lamps—you’re likely facing a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated issues. In my 20+ years as a technician, I’ve seen these modules cause more diagnostic confusion than almost any other component. The good news is, there’s a straightforward, cost-effective solution.
This isn’t just a replacement part; it’s a complete service. We provide a fully tested BCM that is professionally programmed with the exact data from your truck’s original module. This cloning process makes the replacement completely plug-and-play. You avoid expensive towing fees and the high labor costs associated with dealership programming. Simply send us your original BCM, and we’ll handle the complex data transfer, shipping you back a module that’s ready for installation right out of the box.
Is Your GM Vehicle Showing These Symptoms?
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ Interior or exterior lights staying on, flickering, or not turning on.
- ✔ The security or anti-theft system preventing the vehicle from starting.
- ✔ Inaccurate gauge readings or a completely dead instrument cluster.
- ✔ Warning lights for the airbag, ABS, or traction control system are illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) stored in the system, such as U0140 (Lost Communication With Body Control Module) or other B-series codes.
From the Diagnostic Bay
I remember a 2015 Sierra 1500 that came into the shop with the owner at his wit’s end. The dome lights would flicker randomly, the radio would shut off, and sometimes the key fob wouldn’t work. He’d already replaced the battery and checked all the fuses. After connecting my scan tool, I saw multiple communication loss codes pointing to the BCM. Instead of a costly new module and hours of programming at the dealer, we used a cloned BCM. The installation took less than 30 minutes, and every single electrical gremlin was gone. It’s a prime example of how the right part, correctly programmed, can be a simple fix for a very complex problem.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ 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. For other GM models, its location can vary (e.g., firewall, quarter panel), so consult a service manual if you’re unsure.
- ✔ Remove the Original Module: Carefully disconnect all electrical connectors from the BCM. Take a photo beforehand if it helps you remember the orientation. Unbolt or unclip the module from its mounting bracket.
- ✔ Install the Programmed Module: Mount your new, pre-programmed BCM in the same location. Reconnect all electrical connectors firmly until they click into place.
- ✔ Reconnect the Battery: Reattach the negative battery terminal.
- ✔ Perform Final Checks: Start the vehicle and test all body functions—windows, locks, lights, wipers, and radio—to ensure everything is working correctly. Address any post-install procedures if necessary.
Post-Installation Procedures & Important Notes
While our cloning service makes this a plug-and-play repair, some vehicle systems may require a quick handshake with the new BCM. Please be aware of the following:
- Airbag System Sync: If the airbag warning light is on 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: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light and traction control operation.
- No Core Charge: You can keep your original module as there is no core charge or need to return it after the service.
Disclaimer: Vehicle systems vary. For procedures specific to your exact model, always refer to a factory service manual or consult a qualified automotive technician.
Verified Vehicle Compatibility
This BCM programming service is compatible with units bearing part numbers 13592137, 13506935, 13506936, 13587704, or 13594764. It is a direct solution for the following vehicles:
- 2015 Cadillac ATS: Body Control (BCM); (on firewall)
- 2016 Cadillac ATS: Body Control (BCM); (on firewall), ID 13587704
- 2015-2016 Cadillac CTS: Body Control (BCM); (LH dash)
- 2015 Cadillac Escalade & 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), ID 13587704
- 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 / Denali 1500: Body Control (BCM); (under steering column)
- 2015 GMC Sierra 2500 / Denali 2500: Body Control (BCM); (under steering column or LH firewall)
- 2015 GMC Sierra 3500 / Denali 3500: Body Control (BCM); (under steering column or LH firewall)
- 2015 GMC Yukon & Yukon XL 1500: Body Control (BCM); (under steering column)
Frequently Asked Questions
Frequently Asked Questions
How does the programming service work?
After you place your order, we will contact you with instructions to ship your original BCM to us. Once we receive it, we extract the vehicle-specific data and transfer it to the replacement module. We then ship the ready-to-install BCM back to you.
Do I need any special tools to install this?
For the physical installation, you’ll only need basic hand tools to access and unbolt the module. Our programming service eliminates the need for an expensive dealership scan tool for the initial setup. However, a scan tool might be needed for post-install relearn procedures like the airbag sync, if required.
Will this fix my key fobs and security system?
Yes. Because we clone the data from your original module, all security information, including key fob programming, is transferred over. Your existing keys will work immediately without any additional programming.
How long does the whole process take?
We typically program and ship the replacement module the same day we receive your original BCM. The total turnaround time will depend on shipping times to and from our facility. We provide tracking information as soon as your part is on its way back to you.
What if my original BCM is completely dead or not communicating?
In many cases, even if the BCM is failing, we can still extract the necessary data. If your module has severe water or fire damage, data recovery may not be possible. Please contact us before ordering if you suspect this is the case.