Restore Your Truck’s Electrical System with a Hassle-Free BCM Solution
If you’re dealing with bizarre electrical gremlins in your 2015 GMC Sierra 3500, you’re not alone. Flickering lights, malfunctioning power windows, a temperamental security system, or dashboard warnings that come and go are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can make your truck frustrating and unreliable. This isn’t just an inconvenience; it can affect safety systems and leave you stranded. Forget the expensive dealership visit, the towing fees, and the long wait for programming. We offer a streamlined, reliable solution.
This is a professionally programmed BCM, ready for installation. Our process is simple: you send us your original BCM, and we transfer all the critical data—including VIN, mileage, and key programming—to this replacement unit. This cloning service ensures the new module is a perfect digital match for your truck, making installation as close to plug-and-play as possible and eliminating the need for expensive dealer-only tools.
Is Your GM Vehicle Showing These Symptoms?
- ✔ Intermittent or non-working power windows, door locks, or interior/exterior lights.
- ✔ The security or anti-theft system light stays on, preventing the engine from starting.
- ✔ Horn honking randomly or not working at all.
- ✔ Windshield wipers behaving erratically or not activating.
- ✔ False warnings on the driver information center (DIC).
- ✔ Communication error codes, such as U0140 (Lost Communication With Body Control Module), stored in other modules.
Case Study: A Tricky Diagnosis
I recently had a 2015 Sierra 2500 in the shop with a complaint that would drive any owner crazy: the headlights would flicker, the radio would cut out, and sometimes the truck wouldn’t start, showing a ‘Service Theft Deterrent System’ message. The owner had already replaced the battery and checked the main grounds. After connecting my scan tool, I found a dozen communication codes pointing in different directions. The key was that all the failing systems were managed by the BCM. Instead of just throwing parts at it, we pulled the original BCM. After cloning it to one of our replacement units, every single electrical issue was resolved. The problem wasn’t a dozen separate failures; it was one failing BCM causing chaos across the network. This service gets directly to the root of those complex problems.
Your Straightforward Installation Guide
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- ✔ 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 dash. You may need to remove a lower dash panel for access.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors 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 BCM: Mount the replacement BCM in the same location and securely reconnect all electrical connectors. Ensure they click into place.
- ✔ Reconnect Power: Reattach the negative battery terminal.
- ✔ Perform Post-Install Checks: Start the vehicle and verify that all body functions (lights, locks, windows, etc.) are working correctly. Refer to the post-installation procedures below if any warning lights appear.
Important Post-Installation Information
Because this module is cloned from your original, most functions will work immediately. However, in some cases, additional steps may be required:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This 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 to satisfy the traction control system.
- No Core Charge: You can keep your original module. There’s no need to send it back to us after the service is complete.
Disclaimer: Vehicle systems vary. Always consult a factory service manual or a qualified technician if you are unsure about any step.
Will This Fit My Vehicle?
This BCM is a direct replacement for part number 13506936 and is interchangeable with the following part numbers: 13592137, 13506935, 13587704, and 13594764. It is guaranteed to fit the following models:
- ATS: 2015-2016
- Corvette: 2015
- CTS: 2015-2016
- Escalade / Escalade ESV: 2015
- Impala: 2015-2016 (New Style)
- Silverado 1500 / 2500 / 3500: 2015
- Sierra 1500 / 2500 / 3500: 2015
- Sierra Denali 1500 / 2500 / 3500: 2015
- Sonic: 2015-2018
- Suburban 1500: 2015
- Tahoe: 2015
- XTS: 2015
- Yukon / Yukon XL 1500: 2015
Frequently Asked Questions
How does the cloning service work?
After you place your order, we will contact you with instructions to ship your original BCM to us. Once we receive it, our technicians will extract the vehicle-specific data and flash it onto the replacement module. We then ship the programmed module back to you, typically within 1-2 business days.
Will I need to have this programmed by a dealer?
No. Our cloning service transfers all necessary programming, including the VIN and security information. This eliminates the need for any additional programming by a dealership, saving you time and money.
Is this a guaranteed fix for my truck’s electrical problems?
This part is a solution for 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 source of your issues before ordering.
What if my original BCM is completely dead or not communicating?
In most cases, even if the BCM is failing, we can still extract the necessary data. If your module has severe water or fire damage, please contact us before ordering to discuss options.
How long will my truck be down?
Downtime depends on shipping times to and from our facility. We perform the cloning service and ship the replacement module back out within 24-48 hours of receiving your original part. We recommend using an expedited shipping service to minimize downtime.