Solve Your Truck’s Electrical Gremlins for Good
If you’re dealing with a 2007-2011 Chevrolet Avalanche 1500 that seems to have a mind of its own—flickering lights, a dead instrument cluster, or a climate control system that’s gone on strike—you’re likely facing a failing Body Control Module (BCM). As the central hub for your truck’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated problems. This OEM-quality replacement, part number 15263497 (and interchangeable with 25844480), arrives pre-programmed to your vehicle’s specific VIN, eliminating the need for an expensive trip to the dealership for coding.
This isn’t just a part; it’s a permanent solution. By replacing your old module, you’re restoring the critical communication pathways that control everything from your power windows and door locks to your security system and wiper functions. Get your truck back to operating reliably and predictably with a component designed for a perfect fit and seamless integration.
From the Diagnostic Bay: The Ghost in the Machine
I remember a 2008 Avalanche that came into my shop with a laundry list of bizarre symptoms. The owner was convinced it was haunted. The radio would turn on by itself, the A/C blower worked only on high, and the security light would flash randomly, sometimes 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 towards the BCM. A quick check of the main ground under the driver’s side dash confirmed it was tight. It was a classic case of internal BCM failure. We swapped in a VIN-programmed module like this one, and in less than 10 minutes, every single issue was resolved. This is one of the most common and satisfying fixes for these GM trucks.
Your 5-Minute BCM Installation Guide
Installing your new 2007-2011 Avalanche 1500 BCM is a straightforward process that most DIYers can complete with basic tools. The module 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 any electronic components.
- Locate the BCM: On your Avalanche, find the BCM mounted to a bracket under the dash. You may need to remove a lower dash panel for easier access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs, so be gentle. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Seat the new, pre-programmed BCM into the 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. Turn the key to the ‘On’ position and test all functions: lights, wipers, locks, windows, and HVAC to confirm the repair was successful.
Is Your Truck Showing These Electrical Faults?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution.
- ✔ The air conditioning or heater blower motor is inoperative or works intermittently.
- ✔ Your power windows, door locks, or interior lights have stopped working correctly.
- ✔ An airbag warning light is illuminated on the dash, often with a DTC like B1001.
- ✔ The vehicle’s security system is malfunctioning, leading to no-start or stalling conditions.
- ✔ You’re seeing multiple, unrelated diagnostic trouble codes (DTCs) across various systems.
- ✔ The instrument panel gauges behave erratically or go dark.
This module is a direct replacement for multiple part numbers, including 15263497, 25835966, 15943678, 20939137, and 22860591.
Verified Vehicle Compatibility
This Body Control Module is engineered to fit a wide range of General Motors trucks and SUVs. While this page focuses on the 2007-2011 Avalanche 1500 BCM, it is also a guaranteed fit for the following models:
- Chevrolet: Silverado 1500/2500/3500 (2007-2013), Suburban 1500/2500 (2007-2011), Tahoe (2007-2011)
- GMC: Sierra 1500/2500/3500 & Denali (2007-2013), Yukon & Yukon XL (2007-2011)
- Cadillac: Escalade, ESV, EXT (2007-2011)
Note: Always verify your part number or consult the detailed fitment list to ensure perfect compatibility.
Frequently Asked Questions
Frequently Asked Questions
What does ‘VIN Programmed’ mean for me?
It means the module arrives ready for installation right out of the box. We program it with your vehicle’s VIN before shipping, so it communicates perfectly with your truck’s other systems without requiring any dealer-level tools or software.
Will I need to do anything after installing it?
In most cases, no. It’s a plug-and-play installation. However, if your airbag light was on due to a BCM communication error (like DTC B1001), you may need a professional scan tool to perform the ‘Setup SDM Primary Key’ function to sync the new BCM with the airbag system. A brake pedal position relearn might also be needed on some models.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep or dispose of your old module without any hassle.
Is this a reliable fix for my Avalanche’s electrical problems?
Absolutely. This module is built to OEM specifications and addresses the root cause of many common electrical failures in these GM trucks. It comes with a one-year warranty for your peace of mind.
What tools do I need for the installation?
You will typically only need basic hand tools, such as a socket set or nut driver to remove the mounting bolts and possibly a trim removal tool for any plastic panels. No special electronic tools are required for the physical installation.