Tired of Unpredictable Electrical Problems in Your Avalanche?
If your 2007-2011 Chevrolet Avalanche 1500 is acting possessed—with flickering lights, a dead HVAC system, or power windows with a mind of their own—you’re likely dealing with a failing Body Control Module (BCM). The BCM is the central nervous system for your truck’s comfort and security features. When it goes bad, it can cause a cascade of frustrating and seemingly unrelated issues. This VIN-programmed replacement BCM is the definitive solution, designed to restore your truck’s electronics to factory-perfect operation without a costly trip to the dealership.
We take the guesswork out of the repair. Simply provide your vehicle’s VIN during checkout, and our technicians will pre-program this module with the latest GM software specific to your truck. This ensures that when it arrives, it’s a true plug-and-play part. You can finally solve those persistent electrical gremlins and get your Avalanche back to being the reliable vehicle you depend on. This is the ideal fix for any DIY mechanic or professional shop looking for a fast, dependable solution for a 2007-2011 Avalanche 1500 BCM failure.
From the Diagnostic Bay
I remember a 2009 Avalanche that came into my shop with a laundry list of bizarre symptoms. The owner said the radio would sometimes not turn on, the driver’s side power lock was dead, and the security light would flash intermittently, occasionally preventing the truck from starting. He’d already replaced the battery and checked fuses. After hooking up my scanner, I saw a handful of communication codes pointing to the BCM. Instead of a lengthy and expensive diagnostic process, we opted for a pre-programmed BCM. The swap took less than 10 minutes, and every single issue was resolved instantly. It’s a textbook example of how a failing 2007-2011 Avalanche 1500 BCM can wreak havoc, and how a straightforward replacement is often the answer.
Is Your Avalanche Showing These Electrical Gremlins?
- ✔ Your power windows, door locks, or mirrors work intermittently or not at all.
- ✔ The HVAC blower motor is erratic, or the climate controls are unresponsive.
- ✔ An airbag warning light is illuminated, often with a DTC like B1001.
- ✔ The anti-theft or security system malfunctions, causing no-start conditions.
- ✔ Interior or exterior lights flicker, stay on, or fail to operate correctly.
- ✔ You’re experiencing phantom battery drain or strange grounding-related problems.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your truck’s battery before working on electrical components.
- ✔ Locate the BCM: On your Avalanche, the BCM is located under the driver’s side of the dashboard, typically to the left of the steering column.
- ✔ Remove the Old Module: Carefully disconnect the electrical connectors from the old BCM. They have locking tabs that need to be pressed to release. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New BCM: Mount your new, VIN-programmed BCM in the same location and reconnect all electrical connectors. Ensure they click securely into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Start the truck and test all functions: lights, windows, locks, wipers, and HVAC to confirm the repair.
- ✔ Post-Installation Note: If your airbag light remains on, a simple “Setup SDM Primary Key in BCM” procedure may be needed using a compatible professional scan tool. This syncs the new BCM with the airbag system.
Verified Vehicle Compatibility List
This module is a direct replacement for part number 15943678 and other interchangeable parts, ensuring a perfect fit for a wide range of GM trucks and SUVs. Please verify your vehicle is on this list:
- Avalanche 1500 (2007-2011)
- Silverado 1500 (2007-2011)
- Silverado 2500/3500 (2007-2011, 2013)
- Suburban 1500/2500 (2007-2011)
- Tahoe (2007-2011)
GMC:
- Sierra 1500 (2007-2011)
- Sierra 2500/3500 (2007-2011, 2013)
- Sierra Denali (2007-2011, 2013)
- Yukon & Yukon XL (2007-2011)
- Escalade (2007-2011)
- Escalade ESV (2007-2011)
- Escalade EXT (2007-2011)
Frequently Asked Questions
2007-2011 Avalanche 1500 BCM
How do I know if this part will fix my truck’s problem?
This is designed to fix issues directly caused by a faulty module. If your truck is experiencing the symptoms listed above, such as erratic lights, non-working power accessories, or security system faults, this part is very likely the solution.