Are you chasing electrical gremlins in your GM truck? One minute the A/C works, the next it doesn’t. Your power locks have a mind of their own, and a pesky airbag light refuses to go away. As a technician with over 20 years of experience, I’ve seen these exact frustrations hundreds of times. The culprit is often a failing Body Control Module (BCM)—the central command center for your vehicle’s electronics. This isn’t just an inconvenience; it can affect vehicle security and safety. Stop swapping relays and checking grounds endlessly. This is the definitive solution to restore full functionality and peace of mind to your truck.
We offer this OEM-quality Body Control Module, part number 15116066, with a professional cloning service. This means we transfer the exact data from your original module to this replacement unit. The result is a true plug-and-play part that retains all your vehicle’s specific options and security information, eliminating the need for an expensive and time-consuming trip to the dealership for programming. It’s the most reliable way to fix your 2003-2007 Silverado 2500 BCM and get your truck operating like new again.
From the Diagnostic Bay: The Case of the Haunted Silverado
A customer brought in his ’05 Silverado 2500, completely fed up. His radio would cut out, the driver’s side window wouldn’t roll down, and his battery was draining overnight. He’d already replaced the battery and the window switch with no luck. On the scan tool, I saw a handful of U-codes (loss of communication) and a B1001 (Option Configuration Error). Instead of just throwing parts at it, I checked the data bus communication at the BCM connectors. The signals were erratic. This confirmed the BCM itself was the source of the data corruption, causing a cascade of failures. We installed a cloned BCM, and every single issue was resolved instantly. This is a classic failure pattern I’ve diagnosed on over 500 GM trucks from this era.
Is Your Truck Showing These Symptoms?
A faulty BCM can cause a wide range of confusing electrical problems. If you’re experiencing any of the following, a replacement is likely the solution:
- âś” Intermittent or non-functional power windows, door locks, or interior lights.
- âś” HVAC system failures, such as a blower motor that won’t turn on or switches between settings on its own.
- âś” An active airbag light on the dash, often accompanied by diagnostic trouble code (DTC) B1001.
- âś” Vehicle security system acting up, leading to a no-start condition or the security light staying illuminated.
- âś” Erratic behavior from windshield wipers or exterior lighting.
- âś” A collection of communication codes (U-codes) stored in various modules.
A Straightforward Guide to Installation
For most DIYers, this is a quick and simple job. You’ll have your truck back to normal in minutes. The BCM is typically located under the driver’s side dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On most Silverado and Sierra models, it’s a black box with several large multi-colored connectors located just above the driver’s left foot, mounted to a bracket.
- Remove the Old Module: Carefully release the locking tabs on each electrical connector and pull them straight out. The module itself is usually held in place by a couple of small bolts or clips. Remove them and take out the old BCM.
- Install the New Module: Seat your new, cloned BCM into the mounting bracket and secure it. Firmly plug in all the electrical connectors until they click into place.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and test all functions—windows, locks, HVAC, lights, etc.
Important Post-Installation Note: In some cases, you may need a professional scan tool to perform an “Airbag System Sync” (also called ‘Setup SDM Primary Key in BCM’) if the airbag light remains on. A “Brake Pedal Position Relearn” might also be required on certain models. Your original module will be returned to you with the cloned unit; we do not require a core.
Will This Fit My Truck or SUV?
This module is a direct replacement for a wide range of General Motors vehicles and is interchangeable with part numbers 10383536, 15136225, 15136877, 15137393, 15137394, 15137395, 15137396, 15198116, 15257043, 15257044, 15257045, 15257046, 10367690, 15064149, and 15194170. It is verified to fit the following models:
- Chevrolet Avalanche 1500/2500 (2002-2006)
- Chevrolet Silverado 1500/2500/3500 Pickup (2003-2007 Classic)
- Chevrolet Suburban 1500/2500 (2003-2006)
- Chevrolet Tahoe (2003-2006)
- Chevrolet Express Van 1500/2500/3500 (2004-2007)
- GMC Sierra 1500/2500/3500 Pickup & Denali (2003-2007 Classic)
- GMC Yukon & Yukon XL 1500/2500 (2003-2006)
- GMC Savana Van 1500/2500/3500 (2004-2007)
- Cadillac Escalade, ESV, EXT (2003-2006)
- Hummer H2 (2003-2007)
Frequently Asked Questions
Frequently Asked Questions
What exactly is a BCM cloning service?
Cloning is a process where we transfer the complete software and vehicle-specific configuration data—including the VIN and security information—from your original BCM to the replacement unit. This makes the new module an exact digital copy, ensuring it works perfectly with your truck’s other systems without any additional programming.
Do I need to send my original BCM to you?
Yes, for the cloning service to be performed, you must send us your original module. We will perform the service and ship both your original module and the newly programmed replacement back to you promptly.
Will this fix my airbag light that is on?
If the airbag light is caused by a BCM fault or a B1001 code, this will resolve the root cause. However, after installation, you may still need to have a technician with a high-level scan tool perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and turn off the light.
Is this a difficult part for a DIYer to install?
No, this is one of the more straightforward electronic module replacements. It’s typically located in an accessible spot under the dash and requires only basic hand tools and about 5-10 minutes of your time. Our installation guide above walks you through the process.
My part number is slightly different. Will this still work?
This module, 15116066, directly replaces many other part numbers. Please check the detailed fitment list above which includes a comprehensive list of interchangeable part numbers to confirm compatibility for your vehicle.