Tired of Your Truck’s Electrical Gremlins? Here’s the Solution.
If you’re dealing with a 2013 GMC Sierra 2500 or another GM truck that seems to have a mind of its own—windows that won’t roll down, a blower motor that works intermittently, or a persistent airbag light—the Body Control Module (BCM) is the most likely culprit. As the central command for your vehicle’s body electronics, a failing BCM can cause a cascade of frustrating and hard-to-diagnose issues. This OEM-quality replacement, equivalent to part number 15263363, is your direct-fit, hassle-free solution. We pre-program it to your vehicle’s specific VIN, so it arrives ready for a true plug-and-play installation, getting you back on the road without a costly trip to the dealership.
A Technician’s Notebook: The Ghost in the Machine
I once had a 2011 Silverado in the bay with an airbag light that just wouldn’t quit. The customer had already replaced the BCM from another supplier, but the DTC B1001 kept coming back. After confirming the new BCM was good, I went back to basics. A quick check with a multimeter revealed a corroded ground strap on the frame beneath the driver’s door. These GMT900 platforms are notorious for it. After cleaning the contact points and re-securing the ground, the new BCM communicated perfectly with the SDM (airbag module) and the light stayed off. Moral of the story: When replacing a BCM, always take five extra minutes to inspect the main body grounds. It can save you hours of headaches.
Is Your Truck Showing These Telltale Signs?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Airbag warning light is on, often with a DTC B1001 (Loss of Communication with SDM).
- ✔ Power windows, door locks, or interior/exterior lights operate erratically or not at all.
- ✔ The HVAC system is unresponsive, or the blower motor works only on certain speeds.
- ✔ Your vehicle’s security system is malfunctioning, causing no-start or stalling conditions.
- ✔ The instrument cluster displays strange warnings or gauges behave abnormally.
- ✔ Radio or entertainment system randomly shuts off or fails to power on.
Your 5-Minute BCM Installation Guide
Replacing the BCM is one of the more straightforward electronic repairs you can do. No complex tools are needed, and it’s typically located in an easy-to-access spot. This is a job most DIYers can handle with confidence.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the BCM: On most GM trucks and SUVs, you’ll find it under the driver’s side dashboard, to the left of the steering column. It’s a black box with several large multi-pin connectors.
- Swap the Modules: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once unplugged, remove the old module (it’s often held by simple clips or a couple of small bolts) and install the new one in its place.
- Reconnect and Test: Plug the connectors firmly into your new, pre-programmed BCM. Reconnect the negative battery terminal.
- Final Checks: Start the vehicle and test all body functions: lights, wipers, windows, locks, and HVAC. In most cases, you’re done! For any lingering airbag lights, a post-install procedure may be needed (see our FAQ).
Verified Vehicle Compatibility
This module is a direct replacement for part number 15263363 and other interchangeable parts, ensuring a perfect fit for a wide range of GM vehicles. Please verify your model and year below.
Cadillac: Escalade, Escalade ESV, Escalade EXT (2007-2013)
Chevrolet: Avalanche 1500 (2007-2013), Silverado 1500/2500/3500 (2007-2013), Suburban 1500/2500 (2007-2013), Tahoe (2007-2013)
GMC: Sierra 1500/2500/3500 (2007-2013), Sierra Denali (2007-2013), Yukon & Yukon XL (2007-2013)
Note: Some 2007 models require the ‘new style’ body with a smooth door skin. Some 2010+ models may require matching the ID 25835966. Please provide your VIN for guaranteed compatibility.
Frequently Asked Questions
Do I need to do any programming after I install this?
No. This module comes fully programmed to your vehicle’s VIN. It is ready for installation right out of the box, saving you a trip to the dealer.
My airbag light is on after installing. What do I do?
This can happen. It means the new BCM needs to be electronically ‘introduced’ to the airbag system’s Sensing and Diagnostic Module (SDM). A professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the modules and turns off the light.
What is a core charge? Do I need to send my old part back?
There is absolutely no core charge for this part. You can keep your old module or dispose of it, with no need to return it to us.
Will this fix my truck’s stalling issue?
In some cases, yes. A failing BCM can disrupt the anti-theft system (Passlock/Passkey), which can lead to intermittent stalling or no-start conditions. Replacing a faulty BCM often resolves these security-related engine problems.
Is this a genuine OEM part?
This is a high-quality, new-condition part built to meet or exceed original equipment specifications for performance and reliability. It is backed by our one-year warranty.