Tired of Chasing Electrical Gremlins in Your GM Truck?
If you’re dealing with a GMC Sierra or another GM truck from this era that seems to have a mind of its own—windows that won’t roll down, a blower motor that works intermittently, or a security light that keeps you from starting the engine—you’ve likely met the frustrating reality of a failing Body Control Module (BCM). As the central hub for your truck’s body electronics, a faulty BCM can cause a cascade of baffling issues. This isn’t just an inconvenience; it can affect your vehicle’s safety and reliability. This direct-replacement BCM, part number 15064149, is the definitive solution, arriving pre-programmed to your truck’s specific VIN for a true plug-and-play repair.
From the Diagnostic Bay: The Case of the Haunted Sierra
I remember a 2006 Sierra 3500 rolling into my shop with a laundry list of complaints from the owner. The radio would shut off, the dome light would flicker, and the power locks worked only when they felt like it. He’d already replaced the battery and checked all the main grounds. We scanned it and pulled a B1001 for an option configuration error, along with a slew of communication codes. While we always check for bad grounds and wiring first—especially under the driver’s side sill plate where moisture can collect—everything checked out. The culprit was a classic internal BCM failure. We installed a VIN-programmed module just like this one, and in less than 10 minutes, every single issue was resolved. This is a common failure point on these trucks, and a pre-programmed module is the fastest, most reliable fix.
Is Your Sierra Showing These Telltale Signs?
A failing BCM can manifest in numerous ways. If your truck is experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔️ Intermittent or non-functional power windows, door locks, or interior lights.
- ✔️ HVAC system problems, such as a blower motor that won’t turn on or is stuck on high.
- ✔️ The security or anti-theft light is on, causing a no-start or crank-no-start condition.
- ✔️ An illuminated airbag light, often accompanied by Diagnostic Trouble Codes (DTCs) like B1001.
- ✔️ Unpredictable behavior from your windshield wipers or exterior lighting.
- ✔️ Communication errors with other modules on the vehicle’s network.
Your 5-Minute Installation Guide
Getting your truck back to 100% is easier than you think. No need for an expensive trip to the dealership. For most DIYers and professional mechanics, this is a quick and straightforward job.
- Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work. This prevents short circuits and helps reset the vehicle’s systems.
- Locate the BCM: On most 2003-2007 Sierra and Silverado models, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black plastic box with several large electrical connectors.
- Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once unplugged, remove the old module from its mounting bracket and install the new one.
- Connect and Test: Plug the connectors firmly into your new, pre-programmed BCM. Reconnect the battery terminal. Start the truck and test all functions—windows, locks, lights, wipers, and HVAC—to confirm the repair.
Important Post-Installation Information
Because this module is pre-programmed, most functions will work immediately. However, depending on your vehicle’s specific configuration, a couple of simple procedures may be needed:
- Airbag System Sync: If the airbag warning light is on after installation, a technician will need to use a professional scan tool to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor relearn may be required to ensure proper brake light and traction control operation.
- No Core Charge: You are not required to send your old part back. There is no core charge, saving you time and hassle.
Verified Fitment for Your GM Truck or SUV
This Body Control Module is a guaranteed fit for a wide range of General Motors vehicles. It is a direct replacement for part numbers 15064149, 15116066, 15198116, 10383536, and others. Please verify your vehicle from the list below:
CHEVROLET SILVERADO 1500/2500/3500 (2003-2007 Classic)
CHEVROLET SUBURBAN 1500/2500 (2003-2006)
CHEVROLET TAHOE (2003-2006)
CHEVROLET EXPRESS VAN 1500/2500/3500 (2004-2007 w/ PRP option)
GMC SIERRA 1500/2500/3500 & DENALI (2003-2007 Classic)
GMC YUKON & YUKON XL 1500/2500 (2003-2006)
GMC SAVANA VAN 1500/2500/3500 (2004-2007 w/ PRP option)
CADILLAC ESCALADE, ESV, EXT (2003-2006)
HUMMER H2 (2003-2007)
Note: For 2007 models, this fits the ‘Classic’ body style (with creased door skin) only.
Frequently Asked Questions
Do I need to take my truck to the dealer for programming?
No. This module comes fully pre-programmed to your vehicle’s VIN. It is ready for installation right out of the box, saving you hundreds in dealership fees.
What tools do I need for installation?
For most models, you’ll only need a basic socket set to disconnect the battery and possibly a small trim removal tool to access the module. No special electronic tools are required for the physical installation.
Will this fix my airbag light?
If the airbag light is on due to a faulty BCM (like DTC B1001), this module will resolve the root cause. However, you may need a scan tool to perform the “Setup SDM Primary Key” procedure to clear the light after installation, as it’s a critical safety system communication check.
Is there a core charge for my old BCM?
No, there is no core charge. You can keep your old part without any penalty, making the process simpler and more convenient for you.
What is the warranty on this part?
This Body Control Module is backed by our one-year warranty, giving you peace of mind and confidence in your repair.