Fix Your Truck’s Electrical Headaches for Good
If you’re dealing with a cascade of bizarre electrical issues in your 2007-2011 GMC Sierra 3500, the Body Control Module (BCM) is the most likely culprit. As the central hub for your truck’s comfort and convenience features, a failing BCM can make daily driving a nightmare. This replacement Sierra 3500 Body Control Module, part number 15284816, is the definitive solution. We simplify the repair process with our professional cloning service, which transfers all the critical data from your original module to this replacement unit. The result is a true plug-and-play part that requires no expensive trip to the dealership for programming.
A Technician’s Notebook: The Ghost in the Machine
I remember a 2009 Sierra 3500 work truck that came into my bay with a list of complaints that seemed unrelated. The driver said the radio would cut out, the driver’s side window worked intermittently, and the HVAC blower would sometimes refuse to turn on. He’d already replaced the battery and checked fuses. After hooking up my scanner, I saw a handful of communication codes and a specific DTC B1001 for the airbag system. This pattern of widespread, non-specific electrical failures immediately pointed me to the BCM. A faulty BCM acts like a bad switchboard operator, sending the wrong signals—or none at all. By installing a cloned BCM, we restored full functionality in under 15 minutes, solving all the ghost-like issues at once and getting that work truck back on the job.
Is Your Sierra Exhibiting These Symptoms?
A failing BCM doesn’t usually die silently. It will often cause a variety of frustrating problems. If you’re noticing any of the following, it’s time to inspect your BCM:
- ✔ Erratic or non-functional power windows, door locks, or interior lights.
- ✔ The security system acts up, preventing the truck from starting.
- ✔ The HVAC system or blower motor operates intermittently or not at all.
- ✔ An airbag warning light is illuminated on the dash, often with a DTC B1001.
- ✔ Wipers, horn, or other accessories work unpredictably.
- ✔ Communication issues between various vehicle modules.
A Straightforward Guide to BCM Installation
Replacing your Sierra 3500 Body Control Module is a job most DIYers can handle with basic tools. Thanks to our cloning service, the electronic setup is already done for you.
- Safety First: Always disconnect the negative terminal from your truck’s battery before working on any electronic components.
- Locate the BCM: On most GM trucks of this era, the BCM is located under the driver’s side of the dashboard, near 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 old BCM and remove it from its mounting bracket.
- Install the New Module: Seat the new, cloned BCM into the bracket and reconnect all electrical harnesses. Ensure they click securely into place.
- Reconnect and Test: Reconnect the battery terminal. Start the vehicle and test all functions: lights, locks, windows, HVAC, and wipers to confirm the repair.
- Post-Installation Checks: In some cases, an airbag light may persist. This requires a ‘Setup SDM Primary Key in BCM’ procedure using a bi-directional scan tool. Similarly, a Brake Pedal Position relearn may be needed for optimal performance.
Verified Fitment for Your GM Truck or SUV
This module is a direct replacement for part number 15284816 and other interchangeable parts, ensuring broad compatibility across the GM truck and SUV lineup. Please verify your part number before ordering.
SIERRA 3500 PICKUP 08-11 Body Control (BCM)
Also fits a wide range of Chevrolet Silverado, Suburban, Tahoe, Avalanche; GMC Sierra, Yukon; and Cadillac Escalade models from 2007-2013. This part is interchangeable with: 25835966, 15263363, 15263497, 15878753, 15943678, 15926094, 20939137, and more.
Frequently Asked Questions
What exactly is a ‘Cloning Service’?
Our cloning service is a process where our technicians transfer the essential vehicle-specific data (like VIN, mileage, and key information) from your original, faulty BCM to the replacement unit. This makes the new module a perfect electronic match for your truck, eliminating the need for dealership programming.
Do I have to send my original BCM to you?
Yes. For the cloning service to work, we need your original module to extract the data. We perform the service and ship both your original module and the ready-to-install replacement back to you.
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, if the light remains on after installation, you may need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a compatible professional scan tool to sync the airbag system.
Is there a core charge for this part?
No, there is no core charge. Your original module is required for our cloning service, and it will always be returned to you along with the programmed replacement unit.
What if I still have problems after installation?
Our parts come with a one-year warranty and expert support. Before installation, it’s always a good idea to check for poor ground connections, which can mimic BCM failure. If issues persist, consult the factory service manual or contact our support team for assistance.