Restore Your Van’s Electrical Systems with a Plug-and-Play BCM
If you’re dealing with bizarre electrical issues in your 2004-2007 Chevrolet Express 2500 Van—like power windows with a mind of their own, a dead HVAC panel, or a security light that won’t let your engine start—you’ve likely met the culprit: a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and hard-to-diagnose problems. This replacement BCM, part number 15116066, is the definitive solution, arriving at your door with a complete cloning service of your original module’s data, eliminating the need for expensive dealership programming.
Case Study: The Ghost in the Work Van
I remember a 2006 Express 2500 that came into my shop. The owner, a contractor, was at his wit’s end. Some days the dome lights wouldn’t turn off, draining the battery. Other days, the power door locks wouldn’t respond. He’d already replaced the battery and checked all the fuses. After connecting my scanner, I saw a handful of communication codes but nothing pointing to a single failed component. This is a classic sign. In my 20+ years of experience, these widespread, intermittent electrical faults on GM platforms almost always trace back to a failing BCM. The internal logic board develops micro-fractures or capacitor issues, causing unpredictable behavior. We installed a cloned BCM, and every single issue vanished instantly. It’s a fix that restores not just the vehicle, but the owner’s confidence.
Is Your GM Van Showing These Electrical Gremlins?
A failing BCM doesn’t always trigger a check engine light. Instead, it manifests as a series of annoying and seemingly unrelated problems. Here are the most common symptoms I see in the shop:
- ✔ The HVAC blower motor works intermittently or not at all, leaving you without heat or A/C.
- ✔ Power door locks or windows fail to operate from the switch.
- ✔ The anti-theft system acts up, causing a no-start condition and a flashing security light.
- ✔ An airbag warning light is illuminated, often with a diagnostic trouble code like B1001 (Option Configuration Error).
- ✔ Interior or exterior lights (headlights, brake lights) behave erratically, staying on or not turning on at all.
- ✔ Wipers won’t turn on, or they won’t park in the correct position.
Your 5-Minute Path to a Fully Functional Van
One of the best parts of this solution is the simplicity of the installation. Because we handle the programming via our cloning service, you don’t need any special computers or a trip to the dealer. Just basic hand tools and a few minutes of your time.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: In most 2004-2007 Express and Savana vans, the BCM is located in the center of the dashboard, often behind a lower access panel.
- Swap the Module: Carefully unplug the electrical connectors from your old BCM. They have locking tabs, so be gentle. Remove any mounting bolts or clips holding it in place. Install the new module and securely reconnect all harnesses.
- Reconnect Power: Reattach the negative battery terminal.
- Verify the Fix: Start the vehicle and test all the functions that were previously malfunctioning—lights, locks, windows, HVAC, etc.
Important Post-Installation Note: In some cases, a vehicle may require an ‘Airbag System Sync’ or ‘Brake Pedal Position Relearn’ using a professional scan tool if related warning lights appear. This is dependent on the specific vehicle configuration. Also, there is no core charge! You send us your original module for the cloning service, and we send it right back to you with your new, ready-to-install part.
Verified to Fit These GM Models
This BCM is a direct replacement for part number 15116066 and is interchangeable with several other part numbers, including 15136225, 15198116, and 10383536. It is confirmed to fit the following vehicles, specifically models with the commercial tradesman package (opt PRP) for vans:
- Chevrolet Express 1500/2500/3500 Van (2004-2007)
- GMC Savana 1500/2500/3500 Van (2004-2007)
- Chevrolet Avalanche 1500/2500 (2003-2006)
- Chevrolet Silverado & GMC Sierra 1500/2500/3500 (2003-2007 Classic)
- Chevrolet Suburban & GMC Yukon XL (2003-2006)
- Chevrolet Tahoe & GMC Yukon (2003-2006)
- Cadillac Escalade, ESV, EXT (2003-2006)
- Hummer H2 (2003-2007)
Frequently Asked Questions
What is a ‘Cloning Service’ and why do I need it?
Cloning is a process where we transfer the vehicle-specific data (like VIN, mileage, and security information) from your original BCM to the replacement one. This makes the new module plug-and-play, so the vehicle accepts it without needing a trip to the dealership for expensive programming.
Do I need to send my original BCM to you?
Yes. For the cloning service to work, we need your original module to extract the necessary data. We will return your original module along with the newly programmed replacement.
Is this hard to install myself?
Not at all. For most DIYers with basic tools, the physical swap takes less than 10 minutes. The BCM is typically easy to access under the dash. Since the programming is done beforehand, it’s one of the easier electronic component replacements you can do.
Will this fix my airbag light?
If the airbag light is caused by a BCM communication error (like DTC B1001), this will resolve the root cause. However, after installation, you may need a technician with a high-end scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and clear the light.
What if my original part number is different?
This module, 15116066, directly replaces many other GM part numbers like 15136225, 15198116, and more. As long as your vehicle is on our compatibility list, this module is the correct fit for your application.