Solve Persistent Electrical Problems in Your GM Truck
If your 2003-2007 Chevrolet Silverado 1500 is plagued by strange electrical issues, a failing Body Control Module (BCM) is often the root cause. As a technician with over two decades of experience, I’ve seen firsthand how a faulty BCM can create a cascade of frustrating problems that seem unrelated. From power windows that won’t budge to a security light that prevents your truck from starting, this module is the central command for your vehicle’s body electronics. This replacement BCM, part number 15137395, is the definitive solution to restore order and reliability to your truck.
From the Diagnostic Bay: The Case of the Haunted Silverado
A customer brought in a 2005 Silverado 1500 with a laundry list of complaints: the radio would cut out, the dome light would flicker, and sometimes the power locks wouldn’t respond. He’d already spent a small fortune replacing the battery and checking grounds. After connecting my scanner, I saw a handful of communication codes pointing to the BCM. Instead of hours of complex wiring diagnostics, we opted for a BCM replacement. With our cloning service, the essential data from his old module was transferred to the new one. The result? A 15-minute install and every single ghost in his machine was gone. This is a common story, and this part is the hero every time.
What is Our BCM Cloning Service?
The biggest headache with replacing a modern BCM is the need for expensive dealership programming. Our unique Cloning Service eliminates that step entirely. You simply send us your original BCM, and we professionally transfer its key vehicle-specific data to this new unit. This ensures that all your existing keys, security information, and vehicle options work perfectly the moment you plug it in. It’s a true plug-and-play fix that saves you time, money, and a trip to the dealer. We handle the technical work so you can get back on the road.
Is Your Silverado Showing These Electrical Gremlins?
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ HVAC blower motor or climate controls not working correctly.
- ✔ The security system light is on, or the vehicle won’t start (anti-theft issue).
- ✔ An airbag warning light on the dash, sometimes with a B1001 code.
- ✔ Erratic interior or exterior lighting behavior.
- ✔ Communication loss DTCs (U-codes) stored in the system.
A Straightforward Guide to BCM Replacement
- ✔ Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- ✔ Locate the BCM: On most Silverado and Sierra models, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black box with several large electrical connectors.
- ✔ Swap the Module: Carefully unplug the electrical connectors from your old BCM. They have locking tabs that need to be depressed. Remove the old module and install your new, pre-programmed unit in its place.
- ✔ Reconnect and Test: Re-attach all electrical connectors firmly. Reconnect the battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and HVAC to confirm the repair.
- ✔ Post-Install Checks: In some cases, an ‘Airbag System Sync’ or ‘Brake Pedal Position Relearn’ may be needed if related warning lights appear. This requires a professional scan tool but is not always necessary.
Verified Fitment for Your GM Truck or SUV
This BCM is a direct replacement for part number 15137395 and is interchangeable with several other part numbers, including 15116066, 15137394, and 15198116. It fits a wide range of GM trucks and SUVs. Please verify your part number before ordering. Key compatible models include:
- ✔ Chevrolet Silverado 1500 / 2500 / 3500 (2003-2007 Classic)
- ✔ GMC Sierra 1500 / 2500 / 3500 (2003-2007 Classic)
- ✔ Chevrolet Tahoe & Suburban (2003-2006)
- ✔ GMC Yukon & Yukon XL (2003-2006)
- ✔ Cadillac Escalade, ESV, EXT (2003-2006)
- ✔ Chevrolet Avalanche (2003-2006)
- ✔ Hummer H2 (2003-2007)
Note: Fitment can vary based on specific options like Crew Cab or transmission type. Always confirm compatibility.
Frequently Asked Questions
What exactly does the Cloning Service do?
Our Cloning Service copies the vital, vehicle-specific data (like VIN, mileage, key codes, and RPO options) from your original BCM to the replacement unit. This makes the new module a perfect electronic match for your truck, avoiding the need for dealer programming.
Do I need to send my original BCM to you?
Yes. For the cloning process to work, we need your original module to extract the data. We will return your original module along with the newly programmed replacement.
Is this a difficult part for a DIYer to install?
Not at all. The physical installation is very simple and typically takes less than 30 minutes with basic tools. It’s usually located under the driver’s side dash and involves unplugging a few connectors and swapping the box.
What happens if my airbag light comes on after installation?
This can occasionally happen. It means the new BCM needs to be electronically introduced to the airbag system’s computer (SDM). A professional mechanic with a capable scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is there a core charge for this part?
No, there is no core charge. We always return your original module to you after the cloning service is complete, so you don’t have to worry about core returns or fees.