Are you battling bizarre electrical issues in your Chevy Silverado or GMC Sierra HD? One minute the power windows work, the next they don’t. The security light is flashing, the HVAC system has a mind of its own, or worse, your truck won’t start. As a technician with over two decades of experience, I’ve seen these exact symptoms hundreds of times, and they almost always point to a failing Body Control Module (BCM). This isn’t just an inconvenience; it’s a reliability issue that can leave you stranded. This BCM, part number 15136877, is the definitive solution for your 2003-2007 Silverado 3500 BCM problems.
What makes our service the best choice for both professional shops and DIY mechanics is our expert Cloning Service. Instead of just programming a replacement module with your VIN, we perform a complete data transfer from your original BCM to this new unit. This process copies all the specific settings, key data, and software configurations unique to your truck. The result is a true plug-and-play module that requires no expensive trip to the dealership for additional programming. It’s the most seamless and reliable way to restore your truck’s electronic functions perfectly.
From the Diagnostic Bay: The Case of the Haunted Silverado
A customer brought in his ’05 Silverado 3500 with a laundry list of complaints: intermittent no-start, radio cutting out, and the airbag light flickering. He’d already replaced the battery and checked the grounds. After connecting my scanner, I saw a slew of communication DTCs and a B1001 code. Instead of chasing electrical ghosts for hours, I went straight for the BCM. We performed our cloning service on a replacement unit, and once installed, every single issue was resolved. This is a classic failure pattern for these modules, and our cloning process saved the customer hundreds in diagnostic and dealership programming fees.
Is Your Truck Showing These Telltale BCM Failure Signs?
- ✔ Non-responsive or erratic power windows, door locks, and interior lights.
- ✔ The security system acts up, preventing the engine from starting (Passlock issues).
- ✔ HVAC controls are dead, or the blower motor runs intermittently.
- ✔ The airbag warning light is illuminated, often with a DTC like B1001 (Option Configuration Error).
- ✔ Unexplained battery drain when the vehicle is off.
- ✔ A variety of communication codes (U-codes) stored in other modules.
A Straightforward Guide to Installation
- ✔ Send Us Your Original BCM: After placing your order, you’ll ship your original Body Control Module to us. Our cloning service ensures all your vehicle’s specific data is transferred.
- ✔ Safety First: Once you receive your cloned module back, disconnect the vehicle’s negative battery terminal to prevent electrical shorts and help reset the system.
- ✔ Locate the Module: On most Silverado/Sierra trucks, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s typically held in place by retaining clips.
- ✔ Swap the Connectors: Carefully disconnect the multiple wiring harnesses from the old BCM and connect them to your new, cloned unit. The connectors are color-coded and keyed to only fit in the correct spot.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all body functions—lights, locks, windows, wipers, and HVAC—to confirm the repair is successful.
This module is a direct replacement for multiple part numbers, including 15116066, 15136225, 15198116, and others. By choosing our cloning service for your 2003-2007 Silverado 3500 BCM, you’re getting a reliable, cost-effective repair that restores your truck to factory-fresh functionality.
Verified Vehicle Compatibility
This BCM is compatible with a wide range of General Motors trucks and SUVs. Please verify your model and year below. This part fits Crew Cab models for most pickups listed.
GMC: Sierra 1500/2500/3500 (03-07 Classic), Sierra Denali (03-07 Classic), Yukon/Yukon XL (03-06)
Cadillac: Escalade, ESV, EXT (03-06)
Hummer: H2 (03-07)
Note: For 2007 models, this fits the ‘Classic’ body style with the creased door skin only.
Frequently Asked Questions
Frequently Asked Questions
How does the Cloning Service work?
You send us your original BCM. We use specialized equipment to read the unique data—including VIN, mileage, and key information—and write it directly onto the replacement module. We then ship both your original module and the ready-to-install replacement back to you. This eliminates the need for any dealer programming.