Is Your Avalanche Experiencing Strange Electrical Problems?
If you’re dealing with flickering lights, malfunctioning power windows or locks, or a persistent “Service Theft System” message on your dash, a failing Body Control Module (BCM) is the likely culprit. The BCM is the central command center for your truck’s body electronics, and when it starts to fail, it can cause a wide range of frustrating and seemingly unrelated issues. Don’t let electrical gremlins sideline your vehicle. This direct-replacement BCM is the reliable solution to restore full functionality to your truck.
This module arrives at your door pre-programmed to your vehicle’s specific VIN. We flash it with the latest GM software updates, ensuring optimal performance and compatibility right out of the box. This critical programming step means you can avoid a costly trip to the dealership for coding. Simply provide your VIN after purchase, and we handle the rest, making the installation process as straightforward as possible.
Common Symptoms of a Failing GM BCM
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ Erratic behavior from interior or exterior lights (flickering, staying on, or not turning on).
- ✔ Instrument cluster gauges dropping out or providing incorrect readings.
- ✔ “Service Theft System” or other security-related warnings on the driver information center.
- ✔ Radio, climate control, or other accessories malfunctioning.
- ✔ The vehicle’s horn sounding randomly.
- ✔ Communication Diagnostic Trouble Codes (DTCs) like U-codes stored in the system.
Solving Issues with Your 2010 Avalanche Body Control Module
Replacing the BCM is a precise repair. Our solution simplifies the process by providing a part that is already configured for your exact vehicle. This eliminates the most complex part of the job—the software configuration. This module is a direct fit for part number 20815898 and is also a compatible replacement for a wide range of other GM part numbers, ensuring broad applicability across many models like the Tahoe, Suburban, Express Van, and more. Please verify your original part number against the list provided to ensure perfect fitment.
Post-Installation Information
While this module is designed for a straightforward installation, some vehicles may require minor post-installation relearn procedures. These are typically simple and can sometimes be required to ensure all related vehicle systems communicate correctly with the new BCM. Key procedures can include:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional scan tool to sync the systems.
- Brake Pedal Position Relearn: A recalibration of the brake pedal position sensor may be needed to ensure proper function of the brake lights and traction control system.
Always consult a factory service manual or a qualified technician for guidance specific to your vehicle.
Frequently Asked Questions
What is a Body Control Module and what does it do?
The Body Control Module, or BCM, is a computer in your vehicle that manages and controls many of the non-engine related electronic functions. This includes power windows, locks, lights, the security system, wipers, and more.
Is this 2010 Avalanche Body Control Module ready to install?
Yes, it is. We pre-program the module to your vehicle’s VIN before shipping. This makes it a plug-and-play installation, though some minor relearn procedures may be necessary depending on your specific vehicle’s configuration.
How do I find my original BCM part number?
The part number is printed on a sticker on the case of your original BCM. The location varies by model but is often found under the steering column, behind the dash, or in the center console area.
What happens if I don’t provide my VIN?
We cannot ship the module without your VIN. The programming is essential for the BCM to work correctly with your vehicle’s specific options and security system. We will contact you after your purchase to get this information.
Will this fix my “Service Airbag” light?
If the airbag light is on due to a communication fault with the old BCM, this new module can resolve the root cause. However, after installation, you may need a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to clear the light, as noted in the post-installation instructions.