Restore Full Functionality to Your GM Truck with a Pre-Programmed BCM
If you’re dealing with baffling electrical issues in your GMC Sierra or other GM truck—like a dead climate control panel, flickering lights, or power windows with a mind of their own—a failing Body Control Module (BCM) is the likely culprit. This isn’t just an annoyance; it can affect vehicle security and safety systems. This replacement module, equivalent to part number 15284816, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN. This eliminates the need for expensive dealership visits and gets your truck’s essential features working correctly right out of the box.
A Technician’s Notebook: The Grounding Gremlin
I once had a 2011 Sierra 3500 in my bay with a classic case of BCM failure symptoms: intermittent radio, windows not working, and a persistent airbag light. The customer had already replaced the BCM once himself, but the problems returned within a week. Before condemning the new part, I went straight to the main BCM ground point under the dash. Sure enough, the bolt was slightly loose and had a hint of corrosion. After cleaning the contact point and tightening the ground, all the issues disappeared. A faulty BCM can cause these problems, but always remember: a bad ground can mimic a bad module. Always check your grounds during installation to prevent a repeat failure.
Is Your Sierra Exhibiting These Electrical Gremlins?
A failing BCM doesn’t always cause a complete shutdown. Often, it presents as a series of frustrating, intermittent problems. Here’s what to look for:
- ✔ The HVAC blower motor works intermittently or not at all.
- ✔ Your airbag warning light is on, often with a DTC like B1001 stored.
- ✔ Power windows, door locks, or interior/exterior lights fail to operate correctly.
- ✔ The security system acts up, causing no-start conditions or random alarm activation.
- ✔ You’re chasing down confusing electrical codes that don’t point to a specific component.
A Straightforward Guide to BCM Installation
For most DIYers and professional technicians, this is a quick and simple job. The BCM is typically located under the driver’s side dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the Module: Remove the lower dash panel (if necessary) to access the BCM. It’s a black box with several large electrical connectors.
- Swap the Connectors: Carefully unplug the wiring harnesses from the old BCM. The connectors have release tabs that must be pressed. Plug them securely into your new, pre-programmed module.
- Mount the New BCM: Secure the new module in the same location as the old one.
- Post-Installation Checks: Reconnect the battery. Start the vehicle and test all body functions—lights, wipers, windows, locks, and HVAC. Important: If the airbag light remains on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. Some models may also require a ‘Brake Pedal Position Relearn’.
Why Choose a VIN-Programmed Module?
The Body Control Module is the central hub for your truck’s comfort and convenience features. Our service ensures this replacement 2011 Sierra Denali 3500 BCM is loaded with the latest GM software and calibrated specifically for your vehicle’s factory options. This provides a level of reliability and seamless integration that a generic, non-programmed part simply cannot match. It’s built to OEM specifications and backed by our one-year warranty, giving you peace of mind on the road. Plus, with no core charge, you can keep your old part without any hassle.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of General Motors trucks and SUVs. It interchanges with multiple part numbers, including 15284816, 25835966, 15943678, 20939137, and 22860591. Please verify your part number or contact us to confirm fitment for your specific vehicle.
CADILLAC ESCALADE, ESV, EXT 07-11
CHEVROLET SILVERADO 1500/2500/3500 PICKUP 07-13
CHEVROLET SUBURBAN 1500/2500 07-11
CHEVROLET TAHOE 07-11
GMC SIERRA 1500/2500/3500 PICKUP 07-13
GMC SIERRA DENALI 1500/2500/3500 07-13
GMC YUKON & YUKON XL 1500/2500 07-11
Note: For 2007 models, this fits the ‘new style’ with a smooth door skin. Some 2010-2013 models may require matching ID 25835966.
Frequently Asked Questions
Is this BCM truly plug-and-play?
Yes, because we program it to your vehicle’s VIN before shipping, it is ready for installation without requiring a trip to the dealership for programming. In rare cases, post-install procedures like an airbag system sync may be needed.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module without any extra fees or hassle.
What tools are required for installation?
Basic hand tools are usually all that’s needed to remove the lower dash panel for access. The BCM itself is held in by clips or small bolts, and the connectors have simple release tabs. No special tools are required for the physical swap.
Will this fix my airbag light with code B1001?
A faulty BCM is a very common cause for this code. Replacing it often resolves the issue, but you must perform the ‘Setup SDM Primary Key in BCM’ procedure with a compatible scan tool after installation to clear the light.
What if I order the wrong part?
We strongly encourage you to match the part number from your original BCM. If you’re unsure, please send us your VIN, and our expert team will verify compatibility for you before you order to ensure you get the right part the first time.