Restore Your Truck’s Functionality and Eliminate Electrical Headaches
If your 2015 GMC Sierra 3500 is plagued by bizarre electrical issues—like flickering lights, malfunctioning power windows, or a dashboard that’s lit up like a Christmas tree—you’re likely dealing with a failing Body Control Module (BCM). As the central nervous system for your truck’s electronics, a faulty BCM can cause chaos, making your reliable workhorse feel unpredictable. This isn’t just an annoyance; it can be a safety concern. This replacement BCM, pre-programmed with your vehicle’s original data, is the definitive, no-hassle solution to get your truck back to 100%.
Our professional cloning service makes this repair straightforward. Forget about costly dealership visits, towing fees, and days of downtime waiting for programming. You simply send us your original BCM, and we transfer all the critical data—including VIN, mileage, and key information—to this replacement unit. When you receive it back, it’s a true plug-and-play installation. We handle the complex part so you can handle the simple swap.
A Technician’s Notebook: The Ghost in the Machine
I had a 2015 Sierra 3500 roll into my bay last month with a list of complaints that seemed unrelated. The driver said his radio would turn off randomly, the driver’s side power window wouldn’t work, and occasionally the truck wouldn’t start, with no crank and just a click. He’d already replaced the battery. My initial scan showed a slew of communication codes (U-codes) pointing to lost communication with various modules. This is a classic sign. Instead of chasing individual components, I went straight for the central hub: the BCM. A faulty BCM acts like a bad switchboard operator, dropping calls between all the other modules. A replacement 2015 Sierra 3500 BCM, cloned from his original, solved every single issue at once. It’s a reminder that sometimes the most confusing problems have a single, central cause.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely culprit:
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security system engaging randomly or preventing the engine from starting.
- ✔ The radio or infotainment system malfunctioning.
- ✔ False warnings on the instrument cluster (e.g., “Service 4WD”).
- ✔ Diagnostic Trouble Codes (DTCs) related to lost communication, such as U0100, U0140, or other U-codes.
- ✔ Inconsistent starting or a no-crank, no-start condition.
A Straightforward Guide to Installation
Installing your pre-programmed BCM is a simple process that most DIYers can complete with basic hand tools. Here’s a general guide:
- Safety First: Always disconnect the negative terminal from your truck’s battery and wait a few minutes before beginning work.
- Locate the BCM: On most 2015 Sierra/Silverado trucks, the BCM is located under the driver’s side of the dashboard, near the steering column or on the firewall.
- Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs, so be gentle. Then, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Reconnect all electrical connectors, ensuring they click securely into place.
- Reconnect Power: Reattach the negative battery terminal.
- Test Functionality: Start the truck and test all the systems that were previously malfunctioning—windows, locks, lights, etc.
Important Post-Installation Note: In some cases, additional steps may be needed. If your airbag light is on, a professional scan tool is required to perform the “Setup SDM Primary Key in BCM” procedure. Similarly, a “Brake Pedal Position Relearn” may be necessary for proper brake light and traction control operation. Always refer to a factory service manual for specifics related to your vehicle.
Verified Vehicle Compatibility
This module is a direct-fit replacement for several GM vehicles and is guaranteed to be compatible if your original part number is listed below. Please match your part number or vehicle from the list to ensure proper fitment.
Interchangeable Part Numbers: 13592137, 13506935, 13506936, 13587704, 13594764
This part will fit these makes and models with these options:
- 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 & Denali Models: 2015
- Sonic: 2015-2018
- Suburban 1500: 2015
- Tahoe: 2015
- XTS: 2015
- Yukon & Yukon XL 1500: 2015
Note: Location varies by model (e.g., under steering column, on firewall, LH dash). Please verify the location on your specific vehicle.
Frequently Asked Questions
How does the programming service work?
After you purchase, we will contact you with instructions to ship your original BCM to us. Once we receive it, we transfer its data to the new module and ship it back to you, typically within 1-2 business days. This makes the replacement a simple plug-and-play install on your end.
Do I need to send my keys?
No, you do not need to send your keys. All the necessary security information is stored within your original BCM and will be transferred during our cloning process.
Is this a guaranteed fix for my truck’s problems?
This part resolves issues directly caused by a faulty BCM. If you’ve experienced the common symptoms listed (erratic lights, window/lock failure, communication codes), it is the most likely solution. Proper vehicle diagnosis is always recommended.
What if my airbag light comes on after installation?
This can happen occasionally. It means the new BCM needs to be synced with the airbag system’s SDM. A repair shop with a professional-grade diagnostic tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is there a core charge?
No, there is no core charge for this item. We need your original module for the data transfer service, but you are not charged a separate core fee.