Restore Full Functionality to Your GM Truck with a Pre-Programmed BCM
If you’re battling bizarre electrical issues in your 2013 Sierra Denali 3500—like flickering lights, a dead HVAC blower, or power windows with a mind of their own—the Body Control Module (BCM) is the most likely culprit. As the central command center for your truck’s body electronics, a failing BCM can cause a cascade of frustrating, hard-to-diagnose problems. This genuine OEM-spec module, part number 22860591 (interchangeable with 25844480 and others), is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play fix.
Is Your Sierra Showing These Electrical Gremlins?
A faulty BCM can manifest in numerous ways. Over my 20 years of diagnostics, I’ve seen these modules cause some of the most confusing symptoms for both DIYers and professional techs. Here are the most common signs that your 2013 Sierra Denali 3500 BCM needs replacement:
- ✔ Intermittent or total loss of power windows, door locks, or interior lighting.
- ✔ HVAC controls not responding or the blower motor working sporadically.
- ✔ The security system acting up, potentially causing no-start conditions or random alarm activation.
- ✔ An illuminated airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Headlights, taillights, or turn signals failing to operate correctly.
- ✔ Communication errors with other modules on the vehicle’s data network.
A Straightforward Guide to Installation
One of the best parts of this solution is its simplicity. Because we program the module to your VIN before shipping, you can avoid a costly trip to the dealership for programming. The entire replacement process can be done in your driveway in under 10 minutes.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most GM trucks from this era, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unclip or unbolt the old BCM and remove it from the vehicle.
- Install the New Module: Seat the new, pre-programmed BCM into the mounting bracket and securely plug in all the electrical connectors. You’ll hear a ‘click’ when they are properly seated.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions: lights, locks, windows, wipers, and the HVAC system to confirm the repair.
Important Post-Install Note: In some cases, particularly if you had an airbag code, the airbag light may remain on. This requires a ‘Setup SDM Primary Key in BCM’ procedure using a bi-directional scan tool. This is a simple function found in the BCM’s special functions menu that syncs it with the airbag system. Additionally, a Brake Pedal Position Relearn might be necessary on some models. And remember, there is absolutely no core charge—you can keep or discard your old part without any hassle.
Guaranteed Fitment for Your GM Truck or SUV
This Body Control Module is a direct-fit replacement for a wide range of General Motors vehicles, ensuring seamless integration and performance. It is compatible with the following models and part numbers:
Interchangeable Part Numbers: 22860591, 25844480, 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138.
Compatible Vehicles (2007-2013): Chevrolet Avalanche, Silverado 1500/2500/3500, Suburban, Tahoe; GMC Sierra 1500/2500/3500, Sierra Denali, Yukon, Yukon XL; Cadillac Escalade, ESV, EXT. Please verify your specific model and year for an exact match or contact our expert support team.
Frequently Asked Questions
What does VIN programming mean for me?
It means this module arrives ready for installation right out of the box. We flash it with your vehicle’s specific VIN and the latest GM software, so it communicates perfectly with your truck’s other systems without requiring a trip to the dealer for expensive programming.
Is this a difficult part for a DIYer to install?
Not at all. The BCM is typically held in by clips or simple bolts under the dashboard. With basic hand tools, most people can swap it out in 5-10 minutes. The most important part is that our pre-programming handles the complex software side for you.
My airbag light is on. Will this fix it?
Yes, a faulty BCM is a very common cause of the airbag light and code B1001. Replacing it will fix the root cause. However, after installation, you may need a professional scan tool to perform the ‘Setup SDM Primary Key’ function to clear the light, as it’s a safety system requirement.
Do I need to send my old BCM back?
No. We do not require a core return for this part. You can keep your old module, which saves you the time, cost, and hassle of shipping it back.
Will this 2013 Sierra Denali 3500 BCM fit other GM trucks?
Yes, this module is compatible with a wide array of GM trucks and SUVs from roughly 2007-2013, including many Silverado, Tahoe, Suburban, and Yukon models. Please check the detailed fitment list or provide your VIN to confirm compatibility.