Fix Your Truck’s Electrical Gremlins for Good
If you’re dealing with a frustrating array of electrical issues in your GMC Sierra, Chevrolet Silverado, or other GM truck, the Body Control Module (BCM) is the most common culprit. As the central command center for your vehicle’s body electronics, a failing BCM can cause chaos—from flickering lights and dead power windows to a no-start condition. This OEM-quality Body Control Module, part number 15284816, is the definitive solution. We pre-program it to your truck’s specific VIN, ensuring it works perfectly right out of the box, no expensive dealership visit required.
A Technician’s Notebook: The Case of the Haunted Sierra
I had a 2013 GMC Sierra 3500 roll into my bay that had its owner at his wit’s end. The radio would randomly shut off, the driver’s side window wouldn’t roll down, the HVAC blower was intermittent, and the security light was on. He’d replaced the battery and checked fuses, but the problems persisted. After hooking up my scanner, I saw a slew of communication codes. From years of experience with these GMT900 platforms, I knew it wasn’t five different problems; it was one. The BCM was failing internally, causing network-wide disruptions. We installed a VIN-programmed module just like this one, and in less than 10 minutes, every single issue was resolved. It’s a textbook example of how a single component, the 2013 Sierra 3500 BCM, can fix a dozen symptoms at once.
Is Your GM Truck Showing These Telltale Signs?
A failing BCM often creates bizarre and seemingly unrelated symptoms. If your vehicle is experiencing any of the following, this module is the likely fix:
- ✔ Unresponsive power windows, door locks, or interior/exterior lights.
- ✔ HVAC system failures, such as a blower motor that won’t turn on or stays stuck on high.
- ✔ An illuminated airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Security system malfunctions, leading to intermittent no-start or stalling conditions.
- ✔ Erratic behavior from windshield wipers or radio controls.
- ✔ A dashboard that looks like a Christmas tree with multiple warning lights.
A Straightforward Guide to Installation
One of the best features of this module is its simple, DIY-friendly installation. You can get your truck back to 100% in your own driveway.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the BCM: On most 2007-2013 GM trucks and SUVs, the BCM is located under the driver’s side of the dashboard, near the steering column.
- Remove the Old Module: Carefully disconnect the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, the module can be unclipped or unbolted from its bracket.
- Install the New Module: Seat the new, pre-programmed BCM into the mounting bracket and firmly reconnect all electrical connectors until they click into place.
- Reconnect & Test: Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and HVAC to confirm the repair.
Post-Installation Note: In some cases, an airbag light may remain on. This is a communication sync issue, not a part defect. It requires a professional scan tool to perform the “Setup SDM Primary Key in BCM” function to clear the light. Additionally, a Brake Pedal Position relearn may be needed on certain models.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of popular GM vehicles. It is interchangeable with part numbers 25835966, 15263363, 15943678, and others. Please verify your part number or contact us with your VIN to ensure perfect fitment.
Chevrolet: Avalanche 1500 (2007-2011), Silverado 1500/2500/3500 (2007-2013), Suburban 1500/2500 (2007-2011), Tahoe (2007-2011)
GMC: Sierra 1500/2500/3500 (2007-2013), Sierra Denali (2007-2013), Yukon & Yukon XL (2007-2011)
Note: For 2007 models, this fits the ‘new style’ with a smooth door skin. For 2010 and 2013 models with specific options, please match ID 25835966.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer that acts as the brain for your vehicle’s body-related accessories. It controls non-engine functions like your lights, power windows, door locks, security system, wipers, and climate controls.
Why is VIN programming so important?
VIN programming loads your vehicle’s specific software and options into the BCM. Without it, the module won’t know how to operate your truck’s features correctly. Our service saves you a trip to the dealer and ensures plug-and-play installation.
Is this a difficult part to replace myself?
No, this is a great DIY-friendly repair. The module is typically accessible under the driver’s side dashboard and requires basic tools and less than 15 minutes to swap out.
What if the airbag light is still on after I install it?
This is normal for some vehicles. The new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). This is done via a ‘Setup SDM Primary Key’ procedure with a bi-directional scan tool. Any professional repair shop can perform this sync.
Is there a core charge for this part?
No. We do not require you to send your old part back. There is no core charge, which simplifies the process for you.