Restore Full Functionality to Your GM Truck or SUV
If you’re dealing with bizarre electrical problems in your GMC Sierra, Chevrolet Silverado, or other GM vehicle, a failing Body Control Module (BCM) is often the culprit. As the central command for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating issues. This OEM-quality replacement, part number 22860591 (interchangeable with 25844480 and others), is the definitive solution. We pre-program it to your vehicle’s specific VIN, ensuring it works perfectly right out of the box, with no expensive dealership programming required.
A Technician’s Notebook: The Case of the Haunted Sierra
A customer brought in his 2013 GMC Sierra 2500 with a list of complaints that sounded like the truck was possessed. The dome lights would flicker, the radio would cut out, and the HVAC blower was completely dead. He’d already replaced the battery and checked fuses. After connecting my scanner, I saw a dozen communication codes. In my 20+ years of experience, this points directly to a BCM issue. We swapped in a VIN-programmed module, and before installing it, I double-checked the main BCM ground point under the dash. It was clean, so we proceeded. In less than 10 minutes, every single issue was resolved. This is a classic BCM failure scenario I’ve seen hundreds of times on these GMT900-platform trucks.
Is Your GM Truck Showing These Signs of BCM Failure?
A failing BCM doesn’t always cause a check engine light, but it creates a host of other problems. If you’re experiencing any of the following, this module is your likely solution:
- ✔ HVAC controls are unresponsive or the blower motor works intermittently.
- ✔ The airbag warning light is on, often with a DTC B1001 (Setup SDM Primary Key in BCM) stored.
- ✔ Power windows, door locks, or exterior lights work sporadically or not at all.
- ✔ The security system acts up, causing no-start conditions or random alarm activation.
- ✔ You’re chasing strange electrical gremlins, stalling, or misfires that aren’t related to the engine computer.
- ✔ Multiple communication U-codes are present when scanning the vehicle.
A Straightforward Guide to Your BCM Installation
Replacing your 2013 Sierra 2500 Body Control Module is a simple job that most DIYers can handle in minutes. The module is located under the driver’s side dashboard, near the steering column.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the BCM: Remove the lower dash panel beneath the steering wheel (usually held by clips or a few screws) to access the module.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once unplugged, unclip the module from its mounting bracket.
- Install the New Module: Snap your new, VIN-programmed BCM into the mounting bracket and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, wipers, windows, locks, and HVAC to confirm the repair.
- Post-Install Check: If your airbag light remains on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ function. This syncs the new BCM with the airbag system. Some models may also require a ‘Brake Pedal Position Relearn’.
Verified Vehicle Compatibility List
This module is a direct-fit replacement for a wide range of General Motors trucks and SUVs. Please verify your part number or contact us with your VIN. This part fits the following vehicles (and more):
- Cadillac Escalade/ESV/EXT: 2007-2011
- Chevrolet Avalanche 1500: 2007-2011
- Chevrolet Silverado 1500: 2007-2011
- Chevrolet Silverado 2500/3500: 2007-2013
- Chevrolet Suburban 1500/2500: 2007-2011
- Chevrolet Tahoe: 2007-2011
- GMC Sierra 1500: 2007-2011
- GMC Sierra 2500/3500: 2007-2013
- GMC Sierra Denali: 2007-2013
- GMC Yukon/Yukon XL: 2007-2011
Note: For 2013 models, this part fits vehicles with option ID 25835966. For 2007 models, it fits the ‘new style’ with a smooth door skin.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for plug-and-play installation, saving you time and money.
Is there a core charge for my old part?
Absolutely not. There is no core charge, so you can keep your old module without any hassle or extra cost.
What tools do I need for the installation?
Basic hand tools are all that’s required, typically a socket or nut driver to remove the lower dash panel. No special electronic tools are needed unless the airbag light procedure is necessary post-installation.
Will this fix my airbag light with code B1001?
Yes, a faulty BCM is a common cause of the B1001 code. However, after installing the new module, you may need a professional scan tool to perform the ‘Setup SDM Primary Key’ procedure to clear the light.
What if this doesn’t fix my problem?
This module comes with a one-year warranty. While it resolves the vast majority of common electrical issues, we always recommend proper diagnostics. If you have any questions, our expert support team is here to help.