Fix Your Truck’s Electrical Gremlins for Good
If you’re dealing with baffling electrical issues in your 2003-2007 GMC Sierra 1500 or another compatible GM truck, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable truck into a source of constant frustration. This isn’t just a part; it’s the central command for your vehicle’s comfort and convenience features. Our professional cloning service for the GM 15116066 BCM is the definitive solution to get your truck’s electronics working flawlessly again.
We solve the biggest headache of module replacement: programming. Instead of you paying for expensive dealership tools and labor, we handle it all. You send us your original BCM, and we expertly transfer its unique data—your VIN, security information, and specific vehicle options—onto this quality replacement unit. The result? A true plug-and-play module that is ready for installation the moment it arrives at your door. We even send your original module back to you. This process restores full functionality and eliminates the communication errors that cause so many problems.
A Technician’s Notebook
I remember a 2006 Silverado 2500 that came into the shop with a classic case of BCM failure. The customer complained of the radio turning on and off by itself, the driver’s side power window not working, and an intermittent no-start condition. He’d already replaced the battery and checked the main grounds. We scanned it and found a slew of U-codes (communication errors) and a B1001 code for an SDM configuration error. Instead of just throwing parts at it, we inspected the BCM connectors for corrosion—they were clean. The diagnosis pointed squarely at an internal failure in the BCM. With our cloned module, the truck was fixed in under an hour, all symptoms gone. It’s a common story for these otherwise bulletproof trucks.
Is Your Truck Showing These Telltale Signs?
A failing BCM doesn’t always cause a check engine light, often leading to a difficult diagnosis. If you’re noticing any of these symptoms, your Sierra 1500 Body Control Module is the most likely culprit:
- ✔ The A/C or heater blower motor works intermittently or not at all.
- ✔ Your power windows, door locks, or interior lights have a mind of their own.
- ✔ The airbag warning light is on, often with a DTC like B1001 (Option Configuration Error).
- ✔ The security light is flashing, and the truck won’t start (PassLock issues).
- ✔ Wipers operate erratically or won’t turn off.
- ✔ A collection of communication (U-codes) or body-related (B-codes) diagnostic trouble codes are present.
Your 5-Minute BCM Installation Guide
Replacing your BCM is one of the easier DIY jobs you can do on your truck. No complex tools are needed, and it typically takes less than five minutes.
- Safety First: Always disconnect the negative terminal on your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the BCM: On most GM trucks and SUVs like the Sierra or Tahoe, the BCM is located under the driver’s side dashboard, to the left of the steering column. In Express/Savana vans, it’s often behind the center dash panel.
- Disconnect and Remove: The module is held in by simple clips or a few small bolts. Carefully unplug the electrical connectors (they have locking tabs, so don’t force them) and remove the old BCM.
- Install the New Module: Plug the connectors into your newly cloned BCM and secure it in place.
- Reconnect and Test: Reconnect the battery terminal. Start the vehicle and test all functions: windows, locks, HVAC, lights, and wipers to confirm the repair.
Post-Installation Checks
Our cloning service ensures a smooth installation, but due to the complexity of modern vehicle systems, a couple of relearn procedures may be necessary in some cases. If your airbag light remains on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. Similarly, a ‘Brake Pedal Position Relearn’ might be required on certain models. These are standard procedures for any professional shop.
Verified Vehicle Compatibility List
This cloning service is for part number 15116066 and is compatible with a wide range of General Motors vehicles. It is interchangeable with part numbers 10383536, 15136225, 15136877, 15137393, 15137394, 15137395, 15137396, 15198116, 15257043, 15257044, 15257045, 15257046, 10367690, 15064149, and 15194170. Please verify your part number before ordering.
- Cadillac: Escalade, ESV, EXT (2003-2006)
- Chevrolet: Avalanche 1500/2500 (2003-2006), Silverado & Sierra 1500/2500/3500 (2003-2007 Classic), Suburban 1500/2500 (2003-2006), Tahoe (2003-2006), Express Van 1500/2500/3500 (2004-2007)
- GMC: Sierra Denali (2003-2007 Classic), Yukon & Yukon XL 1500/2500 (2003-2006), Savana Van 1500/2500/3500 (2004-2007)
- Hummer: H2 (2003-2007)
Frequently Asked Questions
What exactly is a ‘Cloning Service’?
Cloning is a service where we transfer the complete software and vehicle-specific data (like VIN, mileage, and key codes) from your original, failing BCM to this replacement unit. This makes the new part an exact digital copy of the old one, allowing it to work in your truck without any additional programming.
Do I need to send my original BCM to you?
Yes. For the cloning service to work, we require your original module. We will perform the service and ship both your original module and the ready-to-install replacement back to you.
Will this fix my airbag light?
In many cases where the light is caused by a BCM communication error (like DTC B1001), yes. However, if the light stays on after installation, it means the new BCM and the airbag module (SDM) need to be synced. This requires a ‘Setup SDM Primary Key’ procedure with a bi-directional scan tool.
Is this a difficult part for a DIYer to install?
Not at all. The BCM is one of the more accessible modules on these trucks. It’s typically held in with clips and is located under the dash. With basic hand tools and our instructions, most people can swap it in under 5 minutes.
Is there a core charge?
No. Since you are sending your original part to us for the cloning service and we return it to you, there is no core charge or need to handle a separate core return.