Restore Your Truck’s Electronics with a Reliable, Pre-Programmed BCM
If you’re dealing with bizarre electrical issues in your 2010 Chevrolet Avalanche 1500—like power windows with a mind of their own, flickering interior lights, or a security system that won’t cooperate—you’re likely facing a failing Body Control Module (BCM). As the central command center for your truck’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated problems. I’ve seen it hundreds of times in the shop: a vehicle comes in with a list of electrical gremlins that stump the owner, and a quick scan points directly to a communication breakdown originating from the BCM.
This isn’t just an inconvenience; it can affect your vehicle’s safety and security. A failing BCM can impact everything from your exterior lighting and horn to the anti-theft system. Instead of spending a fortune at the dealership for diagnostics and programming fees, we offer a straightforward, dependable solution. This BCM, part number 25934762, arrives at your door pre-programmed with the latest GM software, specifically calibrated to your vehicle’s VIN. This eliminates the need for expensive scan tools or a trip to the dealer, getting you back on the road with confidence.
From the Diagnostic Bay: The Phantom 4WD Fault
I remember a 2010 Avalanche that came into my bay with the “Service 4WD” light on and intermittent power lock failure. The owner had already replaced the transfer case control module, assuming the 4WD light was the primary issue. After he spent hundreds on the wrong part, the problems persisted. My scan tool showed multiple U-codes (loss of communication) with various systems, all pointing back to the BCM. The BCM wasn’t properly relaying messages on the CAN bus network, creating phantom errors across the vehicle. We installed a VIN-programmed BCM, and instantly, the 4WD light went out, the locks worked perfectly, and all communication codes cleared. It’s a classic case of how a failing 2010 Avalanche 1500 Body Control Module can disguise itself as other, more expensive problems.
Common Signs of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The security system light is illuminated, or the vehicle won’t start due to a false anti-theft trigger.
- ✔ Intermittent windshield wiper or washer operation.
- ✔ The horn sounding unexpectedly or not working when pressed.
- ✔ Multiple communication error codes (U-codes) stored in the system.
- ✔ Dash warning lights (like ABS, Airbag, or Traction Control) appearing for no apparent reason.
A Straightforward Guide to BCM Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow the system to fully discharge.
- ✔ Locate the BCM: On the 2010 Avalanche, the BCM is typically located under the steering column, on the driver’s side of the dash. You may need to remove a lower dash panel for access.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical connectors. Ensure they click into place.
- ✔ Reconnect Power: Reattach the negative battery terminal.
- ✔ Perform Relearns: Start the vehicle. You may need to perform specific post-installation procedures, such as the Brake Pedal Position Relearn or an Airbag System Sync if the warning light is on. Please refer to the section below for more details.
Important Post-Installation Steps
While this 2010 Avalanche 1500 Body Control Module is designed for a simple installation, some vehicle systems may require recalibration. Depending on your specific model and options, you may need a professional scan tool to perform the following:
- Airbag System Sync: If the airbag light is on after installation, the “Setup SDM Primary Key in BCM” procedure is necessary to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: A recalibration of the brake pedal position sensor might be required to ensure correct brake light and traction control functionality.
Disclaimer: Always consult a factory service manual or a qualified technician for guidance specific to your vehicle.
Will This Fit My Vehicle?
This BCM is a direct replacement for part number 25934762 and many other interchangeable part numbers. It is guaranteed to fit the 2010 Avalanche 1500 Body Control Module with matching ID numbers, as well as a wide range of other GM vehicles. Please verify your original part number or consult the list below to ensure compatibility.
Compatible Part Numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084
Fits Models Including: Acadia (07-12), Avalanche 1500 (10), Caprice (11-13), Captiva Sport (12), CTS (08-13), DTS (06-11), Enclave (08-12), Equinox (07-09), Escalade/ESV/EXT (10), Express/Savana Vans (08-12), G8 (08-09), Hummer H2 (08-09), Impala (06-13), Lucerne (06-11), Monte Carlo (06-07), Outlook (07-10), SRX (07-09), STS (10), Tahoe (10), Torrent (07-09), Traverse (09-12), Vue (08-10), Yukon/XL 1500 (10), and more. Please check the specific options and ID numbers provided in the fitment data.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to program the BCM with the correct software and vehicle-specific options. This ensures the module communicates perfectly with your truck’s other systems right out of the box.
Is this a plug-and-play part?
Yes, for most functions. Because we pre-program it to your VIN, it eliminates the most difficult step. However, as noted above, some security, airbag, or brake systems may require a simple relearn procedure with a capable scan tool after installation.
Do I need to return my old BCM?
No, there is absolutely no core charge for this part. You can keep your original module.
What tools do I need for installation?
Basic hand tools, such as a socket set and a trim removal tool to access the BCM under the dash, are typically all that’s required for the physical installation. A professional scan tool may be needed for post-installation relearn procedures.
Will this fix my “Service Security System” message?
A faulty BCM is a very common cause of security system errors and no-start conditions in these GM vehicles. While other issues can cause this message, replacing a bad BCM is often the correct fix.