Tired of Chasing Electrical Gremlins in Your GM Truck?
If your 2003-2007 GMC Sierra 3500 is suffering from bizarre electrical issues like flickering lights, a dead instrument cluster, or power windows with a mind of their own, you’ve likely met the culprit: a failing Body Control Module (BCM). As the central command for your truck’s body electronics, when the BCM goes down, it can cause a cascade of frustrating and hard-to-diagnose problems. This isn’t just an inconvenience; it can affect vehicle security and safety. Our professional cloning service for the 2003-2007 Sierra 3500 BCM is the definitive, hassle-free solution to restore your truck’s functionality and your peace of mind.
From the Diagnostic Bay: The Case of the Haunted Sierra
I remember a 2006 Sierra 3500 rolling into my bay with a list of complaints that seemed unrelated. The radio would cut out, the driver’s side power lock worked intermittently, and the security light would stay on, sometimes causing a no-start. The owner had already replaced the battery and checked fuses. A scan showed a handful of communication codes (U-codes) and a BCM internal fault (B1001). Instead of a costly new module and hours of dealership programming, we opted for a cloned unit. We transferred the original data to a replacement BCM. The swap took 10 minutes, and every single issue was resolved instantly. It’s a perfect example of how the right part, correctly prepared, saves time, money, and headaches.
Is Your Sierra Showing These Symptoms?
- ✔️ Intermittent or non-functional power windows, door locks, or interior lights.
- ✔️ The security system acts erratically, preventing the truck from starting.
- ✔️ HVAC controls are unresponsive, or the blower motor works only on high or not at all.
- ✔️ The airbag warning light is illuminated, often with a diagnostic trouble code like B1001 (Option Configuration Error).
- ✔️ Unexplained battery drain when the vehicle is off due to the BCM not going to ‘sleep’.
- ✔️ Communication loss DTCs (U-codes) stored in other modules, pointing to a BCM network issue.
How Our BCM Cloning Service Works
Forget about expensive dealership visits and programming fees. Our cloning service is the most reliable way to replace your BCM. We transfer the vital data from your original, faulty module directly onto this replacement unit. This process copies everything—your vehicle’s VIN, mileage, key data, and specific equipment options (RPO codes). The result is a true plug-and-play module that is 100% compatible with your truck’s specific configuration, requiring no further setup.
Important Note: This is a cloning service. After purchase, you will need to send us your original Body Control Module. We will then clone the data to the replacement unit and ship both modules back to you. We do not keep your original part.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting work.
- ✔ Locate the BCM: On most 2003-2007 Sierra and Silverado models, the BCM is located under the driver’s side of the dashboard, near the steering column.
- ✔ Remove the Old Module: 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 cloned BCM into the mounting bracket and securely plug in all electrical connectors. You should hear a ‘click’ as they lock into place.
- ✔ Reconnect and Test: Reconnect the battery terminal. Start your vehicle and test all body functions—lights, locks, windows, wipers, and HVAC—to confirm the repair.
Post-Installation Checks
In most cases, no further steps are needed. However, depending on your vehicle’s specific state before the failure, a couple of relearn procedures might be required. These are typically only necessary if you see a related warning light after installation.
- Airbag System Sync: If the airbag light is on, a technician will need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a bidirectional scan tool.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure proper brake light and stability control operation.
Verified Vehicle Compatibility
This BCM, part number 15137395, is a direct replacement for a wide range of GM trucks and vans. It is interchangeable with several other part numbers, including 15116066, 15136225, 15137394, 15198116, and more. It fits models such as:
Chevrolet Silverado 1500/2500/3500 (2003-2007 Classic)
Chevrolet Avalanche 1500/2500 (2003-2006)
GMC Yukon / Yukon XL (2003-2006)
Chevrolet Tahoe / Suburban (2003-2006)
Cadillac Escalade / ESV / EXT (2003-2006)
Hummer H2 (2003-2007)
Chevrolet Express Van (2004-2007 with opt PRP)
GMC Savana Van (2004-2007 with opt PRP)
Please verify your part number or contact us with your VIN to ensure perfect fitment for your specific vehicle and options.
Frequently Asked Questions
How does the cloning service work step-by-step?
You purchase the service, we provide shipping instructions, you send us your original BCM, we transfer 100% of its data to the replacement module, and then we ship both your original and the newly cloned module back to you.
Why is cloning a better solution than dealership programming?
Cloning creates an exact replica of your original module’s software, including all vehicle-specific options and security information. This avoids compatibility issues that can sometimes arise with standard programming and makes the installation truly plug-and-play.
Will I need a scan tool or a trip to the mechanic after installation?
For over 95% of installations, no further steps are needed. A professional scan tool is only required in the rare case that the airbag system needs to be re-synced with the BCM, as indicated by a warning light.
What is the turnaround time for the service?
Once we receive your module, the cloning process is typically completed within 1-2 business days before it is shipped back out to you.
Do I get my old BCM back?
Yes, absolutely. Your original module is always returned to you along with the cloned replacement unit. We do not keep cores.
Is this BCM compatible with part number 15116066?
Yes, this module is a fully compatible replacement for part number 15116066 and many others. Our cloning process ensures it will work correctly in place of any of the interchangeable part numbers listed.