Fix Your Truck’s Electrical Gremlins for Good
Are you chasing down bizarre electrical issues in your 2003-2007 Silverado 3500? One minute the power windows work, the next they don’t. The HVAC controls have a mind of their own, and a pesky airbag light stays on. As the central command for your truck’s body electronics, a failing Body Control Module (BCM) is almost always the culprit. This replacement BCM, part number 15064149, is the definitive solution. We simplify the repair with our professional Cloning Service, transferring all the critical data from your original module to this one. The result is a true plug-and-play part that restores full functionality without a costly trip to the dealership.
A Technician’s Notebook: The Case of the Haunted Silverado
A customer brought in his ’06 Silverado 3500 with a list of complaints that sounded like the truck was possessed. The radio would turn on and off, the door locks would cycle randomly while driving, and the security light would flash, sometimes causing a no-start condition. He’d already replaced the battery and checked all the fuses. After connecting my scan tool, I saw a handful of communication loss codes (U-codes) pointing to the BCM. Instead of sending him to a dealer for a new module and programming, we used our cloning service. I pulled the original BCM, copied its data to a quality replacement unit, and sent him the ready-to-install part. The physical swap took him less than 10 minutes. He called back the next day, thrilled that every single issue was gone. This is the power of a correctly prepared module.
Is Your Silverado Showing These Symptoms?
A faulty BCM can cause a cascade of frustrating problems. Over my 20+ years in diagnostics, I’ve seen these modules fail in hundreds of GM trucks. Here are the most common signs that your 2003-2007 Silverado 3500 BCM is on its way out:
- ✔ Intermittent or non-functional power windows, door locks, or interior lights.
- ✔ HVAC blower motor or climate controls not working correctly.
- ✔ The security system acts up, preventing the engine from starting (flashing security light).
- ✔ An active airbag warning light on the dash, often with a DTC like B1001 (Option Configuration Error).
- ✔ Wipers, horn, or exterior lights operating erratically or not at all.
- ✔ A network scan reveals multiple communication DTCs related to body systems.
A Straightforward Guide to BCM Installation
Replacing the BCM is a job most DIYers can handle with basic tools. The key is our cloning service, which eliminates the need for any programming. Just swap the modules.
- Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work. This prevents shorts and helps reset the vehicle’s systems.
- Locate the BCM: On most Silverado and Sierra trucks, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black plastic box with several large multi-pin connectors.
- Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, unclip or unbolt the module from its mounting bracket.
- Install the New Module: Seat your new, cloned BCM into the mounting bracket and securely plug in all the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect and Test: Reconnect the battery terminal. Start the truck and test all the functions that were previously malfunctioning—windows, locks, HVAC, lights, etc.
- Post-Installation Checks: In some cases, you may need a professional scan tool for follow-up procedures like the ‘Setup SDM Primary Key in BCM’ if the airbag light remains on, or a ‘Brake Pedal Position Relearn’. This is vehicle-specific but good to be aware of.
Will This Fit My Truck? Verified Vehicle Compatibility
This module is a direct replacement for part number 15064149 and other interchangeable numbers (see list below). It is engineered for a wide range of General Motors trucks and SUVs. While this page focuses on the 2003-2007 Silverado 3500 BCM, it also fits:
- Chevrolet Avalanche 1500/2500 (2003-2006)
- Chevrolet Silverado 1500/2500/3500 (2003-2007 Classic)
- Chevrolet Suburban 1500/2500 (2003-2006)
- Chevrolet Tahoe (2003-2006)
- Chevrolet Express & GMC Savana Vans (2004-2007)
- GMC Sierra 1500/2500/3500 & Denali (2003-2007 Classic)
- GMC Yukon & Yukon XL (2003-2006)
- Cadillac Escalade, ESV, EXT (2003-2006)
- Hummer H2 (2003-2007)
This module interchanges with the following part numbers: 10383536, 15116066, 15136225, 15136877, 15137393, 15137394, 15137395, 15137396, 15198116, 15257043, 15257044, 15257045, 15257046, 10367690, 15194170.
Frequently Asked Questions
Frequently Asked Questions
How does the Cloning Service work?
After you place your order, you’ll send us your original BCM. Our technicians will use specialized equipment to extract the unique vehicle data—including VIN, mileage, and option content—and flash it directly onto your new module. This makes it a perfect electronic match for your truck.
Do I get my original module back?
Yes. We always return your original module along with the newly programmed replacement. We do not require a core and there are no core charges.
What if my old BCM is completely dead or water damaged?
In many cases, even if the BCM is non-functional, we can still retrieve the necessary data for cloning. If the data is completely unrecoverable, we can often program the replacement using your vehicle’s VIN, though this may require additional security relearn procedures upon installation.
Will I need a mechanic to perform any relearn procedures?
Usually not. Because the cloned BCM is an exact copy, most vehicles will not require any further steps. However, as a precaution, be aware that some GM models may require an ‘Airbag System Sync’ or ‘Brake Pedal Position Relearn’ with a pro-level scan tool if related warning lights appear.
Is this a reliable, long-term fix?
Absolutely. This module is built to meet or exceed OEM specifications for durability and performance. By addressing the root cause of your electrical problems, you are restoring the vehicle’s reliability for the long haul. The part is backed by our one-year warranty.