Are you battling frustrating electrical issues in your GM truck or SUV? A faulty Body Control Module (BCM) is often the culprit behind problems like erratic lights, non-responsive power windows and locks, or a malfunctioning HVAC system. This genuine OEM-quality BCM, part number 20939138, is the definitive solution for restoring your vehicle’s electronic systems to perfect working order. Specifically designed for a wide range of 2007-2013 GM vehicles including the Chevrolet Silverado, Tahoe, Suburban, and GMC Sierra, this module arrives pre-programmed to your vehicle’s VIN, eliminating the need for expensive dealership visits and ensuring a seamless, plug-and-play installation.
Symptoms of a Failing GM Body Control Module
- ✔ Unresponsive or intermittently working power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that won’t turn on or off correctly.
- ✔ HVAC and climate control systems behaving erratically or not working at all.
- ✔ An active airbag warning light, often accompanied by DTC B1001.
- ✔ Security system malfunctions, causing no-start conditions or random alarm activation.
- ✔ A variety of seemingly unrelated diagnostic trouble codes (DTCs) related to body functions.
Why Choose Our 2007-2011 Silverado BCM?
This isn’t just a replacement part; it’s a complete, hassle-free solution. The most critical feature is our complimentary VIN programming service. We flash the module with the latest GM software updates specific to your truck before it ships. This ensures that it communicates perfectly with your vehicle’s other modules, like the ECM and SDM (Airbag Module), right out of the box. This module is a direct replacement for a host of part numbers, including 25844480, 25835966, 15943678, 20939137, and 22860591, among others.
Installation is straightforward for any DIYer with basic tools. 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 most cases, you’ll be done in minutes. However, please note that if your old BCM failure caused an airbag light, a post-installation ‘Setup SDM Primary Key’ procedure may be required using a professional scan tool to sync the modules and clear the light. Additionally, a Brake Pedal Position relearn might be necessary on some models.
Frequently Asked Questions
What does the Body Control Module do on my Silverado?
The BCM acts as the central computer for your truck’s body electronics. It controls non-engine related functions like your power windows, locks, lights, wipers, security system, and HVAC blower motor.
Is this BCM truly plug-and-play?
Yes. We pre-program the module to your vehicle’s specific VIN before shipping. This ensures it works correctly with your existing keys and options without requiring a trip to the dealership for additional programming.
What if my airbag light is on after I install this part?
If the airbag light is on, it means the new BCM needs to be electronically introduced to the airbag system’s Sensing and Diagnostic Module (SDM). This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This is a simple sync function, not full programming.
Where is the BCM located?
On most 2007-2013 GM trucks and SUVs, including the Silverado and Sierra, the BCM is located under the driver’s side of the dashboard, usually to the left of the steering column.
Do I need to send my old BCM back?
No. There is no core charge for this part. You can keep or dispose of your old module without any hassle.