2010 Avalanche 1500 BCM Body Control Module 20839063 | Cloning Service

Restore Your Truck’s Electronics with a Reliable BCM Solution

If you’re dealing with bizarre electrical issues in your 2010 Chevrolet Avalanche 1500—like flickering lights, malfunctioning power windows, or strange warning messages on the dash—you’re likely facing a failing Body Control Module (BCM). As the central nervous system for your truck’s body electronics, a faulty BCM can cause a cascade of frustrating and hard-to-diagnose problems. I’ve seen it countless times in my 20+ years on the shop floor: a perfectly good truck sidelined by what seems like a ghost in the machine. The good news is, the fix is straightforward with the right part.

This is a direct-replacement Body Control Module for your Avalanche, but with a critical difference: our Cloning Service. Instead of shipping you a blank module that requires an expensive trip to the dealership for programming, we handle it all for you. Simply send us your original BCM, and we will professionally transfer all of your vehicle’s specific data—including mileage and key information—to this replacement unit. The result is a truly plug-and-play module, ready for installation right out of the box. This saves you time, money, and the headache of coordinating with a dealer. This is the most efficient way to get your 2010 Avalanche 1500 BCM working correctly again.

Is Your Avalanche Showing These Symptoms?

• ✔ Erratic or non-functional interior/exterior lights.
• ✔ Power windows, door locks, or mirrors not working correctly.
• ✔ Intermittent warning lights on the instrument cluster (e.g., security, airbag, traction control).
• ✔ Issues with the radio or climate control systems.
• ✔ Key fob not responding or vehicle security system acting up.
• ✔ Communication DTCs like U0140 (Lost Communication With Body Control Module).

A Straightforward Guide to Your BCM Swap

1. ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
2. ✔ Locate the BCM: On the 2010 Avalanche, the BCM is typically located under the steering column, to the left of the brake pedal. You may need to remove a lower dash panel for access.
3. ✔ 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.
4. ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location. Reconnect all electrical connectors, ensuring they click securely into place.
5. ✔ Reconnect Battery: Reattach the negative battery terminal.
6. ✔ Test Functionality: Start the vehicle and test all body functions—lights, locks, windows, radio, etc.—to confirm the repair. Note the post-installation procedures below, as some relearns may be necessary.

Important Post-Installation Information

While our cloning service makes this a plug-and-play repair, some vehicle systems may require a handshake with the new BCM. Be aware of these potential procedures:

• Airbag System Sync: If the airbag light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag system with the new BCM.
• Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure proper brake light and traction control operation.

Disclaimer: Specific procedures can vary. Always consult a factory service manual or a qualified technician for guidance.

Verified Vehicle Compatibility List

This module, part number 20839063, is a direct replacement for a wide range of GM vehicles and supersedes many previous part numbers. Please verify your vehicle is on this list and that the location matches. Your original module must have one of the part numbers listed below.

This is a partial list. If you have questions about your specific vehicle, please contact us with your VIN.