Restore Full Functionality to Your GM Truck
Are you dealing with baffling electrical issues in your 2007-2011 Chevrolet Avalanche? One moment the A/C works, the next it’s dead. The power locks have a mind of their own, and a persistent airbag light is on your dash. These aren’t separate problems; they’re classic signs of a failing Body Control Module (BCM). The BCM is the central command for your truck’s body electronics, and when it fails, it can cause a cascade of frustrating, intermittent issues. This replacement BCM, equivalent to part number 15940214, is the definitive solution to restore your vehicle’s reliability and convenience.
Case Study: The Ghost in the Avalanche
A customer brought in his ’09 Avalanche with a laundry list of complaints: dome lights flickering, radio cutting out, and the security light randomly preventing the truck from starting. He’d already replaced the battery and checked the alternator. After hooking up my scanner, I saw a dozen communication codes pointing to the BCM. Before condemning the module, I did my due diligence and checked the main BCM ground connection under the dash—a common weak point. The ground was solid. We installed one of our VIN-programmed BCMs, and in less than 10 minutes, every single electrical gremlin was gone. It’s a textbook example of how a single component can wreak so much havoc.
Is Your Avalanche Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the component you need to fix the problem for good. This is the solution for your 2007-2011 Avalanche BCM problems.
- ✔ Intermittent or non-functional HVAC controls, including a blower motor that won’t turn on.
- ✔ An illuminated airbag warning light, often with a DTC like B1001 (Setup SDM Primary Key In BCM).
- ✔ Unresponsive power windows, door locks, or interior/exterior lighting.
- ✔ Erratic security system behavior, leading to no-start or stalling conditions.
- ✔ A dashboard that looks like a Christmas tree, with multiple warning lights and communication error codes (U-codes).
- ✔ Wipers that operate randomly or not at all.
A Straightforward Guide to Installation
One of the best parts about this solution is its simplicity. Because we program the module to your vehicle’s VIN before shipping, you can avoid a costly and time-consuming trip to the dealership. Installation is a job most DIYers can handle with basic tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the BCM: On most GM trucks of this era, the BCM is located in the driver’s footwell, under the steering column, secured with a few clips or small bolts.
- Swap the Modules: Carefully unplug the electrical connectors from the old BCM. They have locking tabs, so be gentle. Remove the old module and install the new one in its place.
- Reconnect and Test: Plug the connectors firmly into the new BCM. Reconnect your battery terminal. Start the vehicle and test all functions: lights, locks, windows, HVAC, and wipers.
- Post-Install Checks: In some cases, an airbag light may remain or the brake lights may not function correctly. This is normal and requires a simple relearn procedure (see our FAQ).
Verified Vehicle Compatibility
This Body Control Module is a direct-fit replacement for a wide range of General Motors trucks and SUVs. It is interchangeable with part numbers 25835966, 15940214, 25844480, 20939137, and others. While it is the correct part for a 2007-2011 Avalanche BCM replacement, it also fits:
- Chevrolet Silverado, Suburban, Tahoe (2007-2013)
- GMC Sierra, Yukon, Yukon XL (2007-2013)
- Cadillac Escalade, ESV, EXT (2007-2011)
Please verify your specific part number or contact us with your VIN to ensure 100% compatibility.
Frequently Asked Questions
Do I need to take my truck to the dealer after installing this BCM?
No. We program the module with your vehicle’s VIN and the latest GM software before it ships. This makes it a true plug-and-play solution, saving you hundreds in dealership programming fees.
What if my airbag light is still on after installation?
This is a common and expected situation. The new BCM needs to be electronically ‘introduced’ to the airbag system’s SDM. This requires a scan tool with the ability to perform the ‘Setup SDM Primary Key in BCM’ function. Most professional repair shops can perform this in minutes.
Is this a difficult part to replace myself?
Not at all. For most DIYers with basic hand tools, this is a 5-10 minute job. The module is easily accessible under the driver’s side dashboard.
What is a core charge?
A core charge is a deposit you pay until you return your old part. We make it simple: there is absolutely no core charge on this BCM. You can keep your old part without any hassle.
Will this fix my truck’s stalling issue?
It can. While many things can cause a stall, a faulty BCM is a known culprit, especially if the stalling is related to the security system (Passlock/Passkey). If you have other electrical symptoms, the BCM is a strong possibility.