Is Your Avalanche Acting Possessed? Take Control of Your Truck’s Electronics.
If you’re dealing with a frustrating mix of electrical gremlins in your 2010 Chevrolet Avalanche 1500โflickering interior lights, power windows with a mind of their own, a security light that won’t turn off, or even a no-start conditionโthe Body Control Module (BCM) is the most likely culprit. As the central nervous system for your truck’s comfort and convenience features, when the BCM fails, it can cause widespread and confusing problems.
I’ve seen it hundreds of times in my 20+ years as a technician. A customer’s 2010 Avalanche 1500 came into the shop last month with the dome lights staying on and the radio cutting out intermittently. They had already replaced the battery and checked fuses, but the real issue was a failing BCM that had been damaged by moisture. This isn’t just a part; it’s the brain behind dozens of your vehicle’s daily functions.
The Simple, Dealer-Free Solution
Forget about towing your truck to the dealership and paying hundreds for diagnostics and programming fees. This Body Control Module is the straightforward, reliable fix you need. We take all the hassle out of the process. Simply provide us with your vehicle’s VIN during checkout, and our experts will program the module with the latest GM software specifically for your Avalanche. When it arrives, it’s ready for installation.
Common Symptoms of a Failing GM BCM:
- โ Intermittent or non-functional power windows, door locks, or mirrors.
- โ Unpredictable interior or exterior lighting behavior.
- โ The security system light stays on, preventing the engine from starting.
- โ Dashboard warning lights appearing for no reason.
- โ Communication errors with other vehicle modules (DTC U-codes).
- โ Inconsistent A/C or climate control operation.
Easy Installation Guide for Your 2010 Avalanche BCM
Replacing the BCM on your Avalanche is a manageable DIY job. It’s typically located under the driver’s side of the dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes before starting.
- Access the Module: You may need to remove the lower dash panel or knee bolster to gain clear access to the BCM.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs, so be gentle. Then, unbolt or unclip the old BCM from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical connectors. You should hear a ‘click’ as they lock in place.
- Reconnect Battery: Re-attach the lower dash panel and then reconnect the negative battery terminal.
Expert Pro Tip from a 20-Year Tech: Before installing your new BCM, take a moment to inspect the area around the A-pillar and windshield for any signs of water leaks. On these GM trucks, a common cause of BCM failure is water intrusion from a bad windshield seal or clogged cowl drains. A quick check can prevent you from having to do this job twice.
Critical Post-Installation Procedures
Because this module integrates with your vehicle’s safety systems, a couple of final steps are required after installation to ensure everything works perfectly. This is not a defect, but a standard security and calibration process for modern vehicles.
- Airbag System Reset: The airbag warning light will likely be on after replacement. You must perform the ‘Setup SDM Primary Key in BCM’ procedure using a compatible bi-directional scan tool. This re-establishes the secure handshake between the new BCM and the airbag module.
- Brake Pedal Position Sensor Relearn: Some vehicles may require the Brake Pedal Position (BPP) Sensor to be recalibrated. This ensures the brake lights and stability control system receive accurate input. This is also done with a professional scan tool.
Guaranteed Fitment
This module is a direct replacement for a wide range of GM part numbers, including 25847589, 25892622, 20815898, and many more. It fits a vast array of Chevrolet, GMC, Cadillac, and Buick models. Please verify your part number or consult the compatibility list to ensure this is the correct component for your vehicle.