Solving Your Truck’s Electrical Frustrations
If you’re dealing with bizarre electrical problems in your GMC Sierra or other GM truck, you know how frustrating it can be. One minute the power windows work, the next they don’t. The A/C blower motor has a mind of its own, and you might even have a persistent airbag light or a no-start condition that leaves you stranded. More often than not, the culprit is a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can cause a cascade of confusing and unpredictable issues. This replacement Body Control Module, part number 15284816, is the definitive solution to restore order and reliability to your vehicle.
This isn’t just a part; it’s a complete repair solution. We provide a professional Cloning Service, where we transfer the critical data from your original module to this replacement unit. The result is a true plug-and-play component, pre-configured to your truck’s specific VIN and options. This process eliminates the need for expensive and time-consuming programming at a dealership, getting your truck back to work faster. Whether you’re a seasoned mechanic or a DIYer tackling your first module replacement, this service simplifies the job immensely.
From the Diagnostic Bay: The Ghost in the Sierra
I remember a 2013 Sierra 2500 HD that came into my shop with a laundry list of intermittent complaints. The owner, a contractor, said his dash lights would flicker, the radio would cut out, and sometimes the truck wouldn’t start—the security light would just flash. He’d already replaced the battery and checked the main grounds. We spent hours chasing what seemed like a ghost. After confirming power and ground integrity to the BCM, we identified the module itself as the weak link. Internal circuit board failures in these BCMs are common after years of heat cycles and vibration. A cloned replacement module solved every single one of his issues in under 15 minutes of installation time. It’s a classic case where one part can resolve a dozen symptoms.
Is Your Sierra Exhibiting These Electrical Issues?
- ✔ Unresponsive or erratic power windows, door locks, or interior/exterior lights.
- ✔ HVAC system problems, such as a blower that won’t turn on or stays stuck on one speed.
- ✔ An active airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Vehicle security system malfunctions, leading to intermittent no-start or stalling conditions.
- ✔ Communication errors with other modules, triggering various U-codes on a scan tool.
- ✔ Horn, wipers, or other accessories working intermittently or not at all.
A Straightforward Guide to Installation
Replacing your 2013 Sierra 2500 Body Control Module is a job most owners can handle with basic tools. The module is typically located under the driver’s side dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work. Wait a few minutes for the system to fully discharge.
- Locate the BCM: On most GM trucks of this era, the BCM is mounted to a bracket beneath the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Seat the replacement module into the bracket and securely plug in all electrical connectors. You should hear a click as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all body functions—lights, locks, windows, wipers, and HVAC—to confirm the repair.
- Post-Installation Steps: In some cases, an airbag light may persist. This requires an “Airbag System Sync” or “Setup SDM Primary Key” procedure using a compatible professional scan tool. A “Brake Pedal Position Relearn” may also be needed.
Verified Vehicle Compatibility List
This module is a direct replacement for part number 15284816 and interchanges with numerous other part numbers, including 25844480, 25835966, 15263363, and more. It is designed for a wide range of 2007-2013 General Motors trucks and SUVs. While this listing focuses on the 2013 Sierra 2500 Body Control Module, it also fits models such as:
GMC: Sierra 1500/2500/3500, Sierra Denali, Yukon, Yukon XL
CADILLAC: Escalade, Escalade ESV, Escalade EXT
Please verify the part number on your original module or contact us with your VIN to ensure perfect fitment.
Frequently Asked Questions
What exactly is the “Cloning Service”?
Our Cloning Service involves transferring the unique programming and vehicle-specific data from your original, failing BCM directly onto the replacement unit we provide. This makes the new module an identical twin to your old one, ensuring it works seamlessly with your truck’s existing keys, security system, and optional features without any need for dealership intervention.
Do I have to send you my original BCM?
Yes. For the cloning process to work, we need your original module to extract the necessary data. After you place your order, we will provide instructions for sending your part to us. We perform the service and send both your original module and the ready-to-install replacement back to you promptly.
Will this fix my airbag light with code B1001?
A faulty BCM is a very common cause of the B1001 code. Replacing it often resolves the issue. However, after installation, you may need to perform an “Airbag System Sync” (also called “Setup SDM Primary Key in BCM”) with a professional-grade scan tool to clear the light. This procedure re-establishes communication between the BCM and the airbag system.
Is there a core charge for this part?
No, there is no core charge. We require your original module for the cloning service, but it will always be returned to you along with the programmed replacement unit. You are not charged an extra fee.
What if the part number on my module is different?
This module is interchangeable with a long list of GM part numbers, including 25835966, 15943678, 20939137, 22860591, and many others. If your part number is on our compatibility list, this unit will work for you. If you’re unsure, send us your VIN, and our experts will confirm compatibility.