Restore Your Truck’s Electrical System with a Pre-Programmed BCM
If you’re dealing with bizarre electrical issues in your 2007-2011 GMC Sierra 1500, you’re not alone. Flickering lights, a dead HVAC blower, power windows with a mind of their own—these are classic signs of a failing Body Control Module (BCM). The BCM is the central command for your truck’s body electronics, and when it goes bad, it can create a frustrating and difficult-to-diagnose mess. This direct-fit replacement, part number 15926094, arrives at your door pre-programmed to your truck’s specific VIN, eliminating the need for an expensive trip to the dealership for programming.
Case Study: A Tricky Diagnosis
I once had a 2009 Sierra 1500 in my bay that was driving the owner crazy. The radio would turn off randomly, the driver’s side window wouldn’t work, and the airbag light was on, showing a DTC B1001. The owner had already replaced the window switch and checked fuses. The problem was intermittent, making it a nightmare to trace. After hooking up my scanner and seeing multiple communication errors across different systems, all pointing back to one central hub, I knew it was the BCM. A failing BCM can cause these seemingly unrelated problems because it’s the traffic cop for all these signals. We installed a VIN-programmed module, and within 15 minutes, every single issue was resolved. It’s a prime example of how one part can fix a dozen headaches.
Is Your Sierra Showing These Electrical Gremlins?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Erratic or non-functional power windows, door locks, or interior/exterior lights.
- ✔ HVAC system failures, like the blower motor not working or controls being unresponsive.
- ✔ An active airbag warning light, often with a DTC B1001 (Setup SDM Primary Key in BCM).
- ✔ Security system malfunctions, including no-start or stalling conditions due to immobilizer confusion.
- ✔ Strange instrument cluster behavior or multiple warning lights with no clear cause.
- ✔ Poor ground symptoms or communication loss codes (U-codes) stored in various modules.
Quick & Easy Installation Guide
Replacing your 2007-2011 Sierra 1500 BCM is a straightforward job that most DIYers can handle in their driveway. No complex procedures are needed for the initial swap.
- Safety First: Always disconnect the negative terminal from your truck’s battery to prevent electrical shorts.
- Locate the BCM: On most GMT900 platform trucks, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black box with several large multi-pin connectors.
- Swap the Module: Carefully unplug the electrical connectors. They have locking tabs, so be sure to depress them fully. Remove any mounting screws or clips holding the old BCM in place and install the new one.
- Reconnect & Test: Plug all connectors firmly into the new module. Reconnect your battery terminal. Start the vehicle and test all functions—lights, locks, windows, wipers, and HVAC—to confirm the repair.
- Post-Install Checks: In some cases, an airbag light may remain. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. A Brake Pedal Position Relearn might also be needed for full functionality.
Verified Fitment for Your GM Truck or SUV
This Body Control Module is a direct replacement for part number 15926094 and is interchangeable with a wide range of other GM part numbers. It is guaranteed to fit the following vehicles (please verify your specific model and options):
Cadillac: Escalade, ESV, 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: This module is a direct replacement for part numbers 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, and 22860591.
Frequently Asked Questions
Frequently Asked Questions
What does this Body Control Module do?
The BCM acts as the central computer for your vehicle’s body-related accessories. It controls functions like your power windows, door locks, interior and exterior lighting, security system, wipers, and HVAC climate control system.
Is this part really plug-and-play?
Yes! We program the module to your vehicle’s VIN before shipping. This means it will communicate correctly with your truck’s other systems right out of the box, saving you from a costly and time-consuming dealership visit for programming.
Why is my airbag light still on after installation?
This is a common security feature on GM vehicles. If the airbag light is on, it means the new BCM needs to be synced with the airbag system’s Sensing and Diagnostic Module (SDM). A mechanic with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to clear the light.
Do I need to send my old part back?
No. There is no core charge for this part. You can keep your old module, which is convenient and saves you the hassle of return shipping.
How do I know for sure that my 2007-2011 Sierra 1500 BCM is the problem?
The best way to be certain is with a proper diagnosis using a bi-directional scan tool. However, if you are experiencing multiple, unrelated electrical failures (like lights, locks, and HVAC all acting up), the BCM is the most common point of failure.