Restore Your Truck’s Electrical System with a Programmed BCM

If you’re battling bizarre electrical issues in your 2003-2007 GMC Sierra 2500 HD, the Body Control Module (BCM) is often the culprit. As the central command for your truck’s body electronics, a failing BCM can cause a cascade of frustrating problems, from non-functional power windows and erratic lights to a no-start condition that leaves you stranded. This replacement BCM, part number 15194170, is offered with our expert cloning service, providing a true plug-and-play solution to get your workhorse back in service without expensive dealership programming.

We transfer the critical data from your original module to this replacement unit. This process ensures that all your vehicle’s specific settings and security information are preserved, making the installation seamless. This is the most efficient way to resolve deep-seated electrical faults and restore the factory operation of your truck’s comfort and convenience features.

Is Your Sierra 2500 Showing These Electrical Faults?

A faulty BCM can manifest in numerous ways. Over my 20+ years in diagnostics, I’ve seen these modules cause some of the most confusing symptoms. Here are the common red flags:

• ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
• ✔ Interior or exterior lights staying on, flickering, or refusing to turn on.
• ✔ HVAC and climate control problems, such as a blower motor that won’t run or mode doors that are stuck.
• ✔ An active airbag light, often accompanied by diagnostic trouble code (DTC) B1001, indicating a configuration error.
• ✔ Security system malfunctions, causing the anti-theft light to flash and preventing the engine from starting.
• ✔ Unexplained battery drain or strange communication codes between modules.

A Straightforward Guide to BCM Installation

Replacing the BCM is a job most DIYers can handle with basic tools. Our cloning service makes it a simple component swap.

1. Step 1: Safety First – Always disconnect the negative terminal from your truck’s battery before beginning any electrical work. This prevents short circuits and helps reset the vehicle’s systems.
2. Step 2: Locate the BCM – On most 2003-2007 Sierra and Silverado trucks, 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.
3. Step 3: Disconnect and Remove – Carefully unplug the electrical 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.
4. Step 4: Install the New Module – Mount the new, cloned BCM in the same location and securely reconnect all electrical harnesses. Ensure they click into place.
5. Step 5: Reconnect and Test – Reconnect the battery terminal. Start the truck and test all functions controlled by the BCM: lights, locks, windows, wipers, and HVAC to confirm the repair.

Post-Installation Professional Tips

While our cloning service makes this a plug-and-play repair, some GM vehicles may require a couple of quick relearn procedures. If you see an airbag light, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ function. In some cases, a ‘Brake Pedal Position Relearn’ may also be necessary to ensure proper brake light and stability control operation. This highlights the importance of a proper diagnosis before ordering a 2003-2007 Sierra 2500 BCM.

Verified Fitment for Your GM Truck or SUV

This BCM is a direct replacement for part number 15194170 and is interchangeable with several other part numbers, including 15116066, 15136225, 15198116, and more. It is confirmed to fit the following models (please verify your specific options):

• GMC Sierra 2500/3500 Pickup (2003-2007 Classic): Crew Cab models.
• Chevrolet Silverado 2500/3500 Pickup (2003-2007 Classic): Crew Cab models.
• GMC Sierra 1500 / Denali (2003-2007 Classic): Crew Cab models.
• Chevrolet Silverado 1500 (2003-2007 Classic): Crew Cab models.
• Chevrolet Avalanche 1500/2500 (2003-2006)
• Chevrolet Suburban & GMC Yukon XL (2003-2006)
• Chevrolet Tahoe & GMC Yukon (2003-2006)
• Cadillac Escalade, ESV, EXT (2003-2006)
• Hummer H2 (2003-2007)
• Chevrolet Express & GMC Savana Van (2004-2007): Models with commercial tradesman package (opt PRP).