Restore Full Electrical Function to Your GM Truck
If your 2003-2007 GMC Sierra 3500 is experiencing a frustrating array of electrical problems—from flickering lights and a dead HVAC blower to a security system that won’t cooperate—the Body Control Module (BCM) is the most common culprit. As the central command for your truck’s body electronics, a failing BCM can make your reliable workhorse feel unpredictable. This replacement Body Control Module, part number 15064149, is the definitive solution, offered with a professional cloning service that makes installation a true plug-and-play experience, eliminating the need for expensive dealership programming.
Case Study: The Ghost in the Machine
I once had a 2006 Sierra 2500HD in the bay that was driving its owner crazy. The radio would turn on and off by itself, the driver’s side window worked intermittently, and the airbag light was on with a B1001 code. The owner had already replaced the battery and checked all the fuses. After connecting my scanner, I saw multiple communication loss codes pointing to the BCM. These modules often suffer from internal solder joint failure or component breakdown over time, creating these ‘ghost’ issues. By providing a cloned BCM, we transferred all the original vehicle data, and the truck was back to normal in under 10 minutes. This is the exact service we provide here—a fast, reliable fix for complex problems.
Is Your Sierra Plagued by These Electrical Gremlins?
- ✔ Power windows, door locks, or mirrors not responding or working erratically.
- ✔ HVAC controls are inoperative, or the blower motor only works on certain speeds or not at all.
- ✔ The anti-theft or security system acts up, causing a no-start condition.
- ✔ Interior dome lights or exterior lights (headlights, taillights) flicker or fail to turn on.
- ✔ An airbag warning light is illuminated on the dash, often with a DTC like B1001 (Option Configuration Error).
- ✔ Unexplained battery drain when the vehicle is off, caused by the BCM not going to ‘sleep’.
Simple Swap: Your BCM Installation Guide
- ✔ Safety First: Before you begin, disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the system.
- ✔ Locate the Module: On most Sierra and Silverado models, the BCM is located under the driver’s side of the dashboard, near the steering column. You may need to remove a lower dash panel for access.
- ✔ Disconnect and Remove: Carefully unplug the multiple wiring harness connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Seat the new, cloned BCM into the mounting bracket and securely plug in all the wiring harnesses. You’ll hear a click as they lock into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, wipers, and HVAC—to confirm the repair was successful.
Expert Pro Tip: Post-Installation Checks
Expert Pro Tip: Post-Installation Checks
After installing your cloned Sierra 3500 Body Control Module, it’s a good idea to check for any remaining trouble codes. While our cloning service handles the critical data, some vehicles may require a ‘Brake Pedal Position Relearn’ or, if the airbag light persists, an ‘SDM Key Sync’ with a bi-directional scan tool. These are simple procedures for any professional shop and are sometimes necessary to fully integrate the new module with other vehicle systems.
Will This Fit My Truck?
This BCM is a direct-fit replacement for a wide range of General Motors trucks and vans from the 2002-2007 era. It is compatible with part numbers 15116066, 15064149, 15136225, 15198116, and others. While this listing is focused on the Sierra 3500 Body Control Module, it also fits:
- ✔ Chevrolet Silverado, Suburban, Tahoe, Avalanche (1500/2500/3500)
- ✔ GMC Sierra, Yukon, Yukon XL (1500/2500/3500) & Sierra Denali
- ✔ Cadillac Escalade, ESV, EXT
- ✔ Hummer H2
- ✔ Chevrolet Express & GMC Savana Vans (with specific options)
Always verify your part number or consult our fitment list to ensure perfect compatibility.
Frequently Asked Questions
Expert Pro Tip: Post-Installation Checks
After installing your cloned Sierra 3500 Body Control Module, it’s a good idea to check for any remaining trouble codes. While our cloning service handles the critical data, some vehicles may require a ‘Brake Pedal Position Relearn’ or, if the airbag light persists, an ‘SDM Key Sync’ with a bi-directional scan tool. These are simple procedures for any professional shop and are sometimes necessary to fully integrate the new module with other vehicle systems.