Restore Full Electrical Function to Your GM Truck or SUV
Are you battling frustrating electrical problems in your 2007-2011 Chevrolet Avalanche? Intermittent wipers, flickering lights, unresponsive power windows, or a malfunctioning security system are common signs of a failing Body Control Module (BCM). The BCM acts as the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a wide range of confusing and unpredictable issues. This genuine OEM-quality Body Control Module, part number 20939138, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play installation.
Is Your 2007-2011 Avalanche BCM Failing?
A faulty Body Control Module can manifest in numerous ways. If you’re experiencing any of the following symptoms, a BCM replacement is likely the solution you need to restore your truck’s reliability and functionality.
- ✔ Unresponsive or erratic power windows, door locks, or interior lights.
- ✔ HVAC blower motor not working or operating intermittently.
- ✔ The security system light stays on, or the vehicle won’t start.
- ✔ Airbag warning light illuminated on the dash, often with DTC B1001.
- ✔ Wipers turning on by themselves or not working at all.
- ✔ Communication errors with other modules, leading to a variety of diagnostic trouble codes (DTCs).
The Plug-and-Play Advantage
Forget expensive trips to the dealership for programming. We flash this module with the latest GM software and program it directly to your vehicle’s VIN before it ships. This ensures that it communicates perfectly with your truck’s existing systems right out of the box. This simple, direct-fit replacement restores control over all essential body functions, from your headlights to your horn, without any additional hassle. This module is a direct replacement for multiple part numbers, including 25844480, 25835966, 15943678, 20939137, and 22860591.
Installation and Post-Install Notes
Installation is straightforward for most DIY mechanics. The BCM is typically located under the driver’s side dashboard, near the steering column. Simply disconnect the negative battery terminal, unplug the electrical connectors from the old module, remove it, and install the new one in its place. Reconnect everything, and you’re done. In some cases, particularly if the airbag light was on, a ‘Setup SDM Primary Key in BCM’ procedure may be required using a professional scan tool to sync the new BCM with the airbag system. Additionally, a Brake Pedal Position relearn might be needed. There is no core charge, so you can keep your old part.
Frequently Asked Questions
What does the Body Control Module do on my Avalanche?
The BCM is a computer that manages and controls many of your truck’s non-engine related electronic functions. This includes power windows, door locks, interior and exterior lighting, the security system, wipers, and HVAC blower controls.
Do I need to have this BCM programmed by a dealer?
No. This module comes pre-programmed to your vehicle’s VIN. It is ready for installation right out of the box, saving you the time and expense of a dealership visit.
Is this part difficult to install?
For most individuals with basic mechanical skills, the installation is simple and takes less than 30 minutes. The BCM is located under the driver’s side dash and is held in place by clips or small bolts.
What if my airbag light is on after I install the new BCM?
If the airbag light remains on, it means the new BCM needs to be electronically synced with the vehicle’s Sensing and Diagnostic Module (SDM). This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure.
Is there a core charge for my old part?
No, there is no core charge for this part. You can keep or dispose of your old module without needing to send it back.
How can I be sure this part fits my vehicle?
This module fits a wide range of 2007-2013 GM trucks and SUVs, including the Avalanche, Silverado, Sierra, Tahoe, and Yukon. Please verify your vehicle in the fitment chart or match your original part number to the interchange list provided.