Is Your GM Truck Experiencing Strange Electrical Problems?
The Body Control Module (BCM) is the central nervous system for your truck’s body electronics. It manages everything from your power windows and door locks to the interior lights, HVAC system, and security features. When the BCM begins to fail, it can cause a wide range of confusing and intermittent issues that are often difficult to diagnose. This genuine OEM-quality Body Control Module, part number 20939137, is the definitive solution for restoring full electrical functionality to your 2007-2013 GM truck or SUV.
Common Symptoms of a Failing Silverado 3500 Body Control Module
If your vehicle is exhibiting any of the following behaviors, a faulty BCM is the likely culprit. Replacing it can resolve these persistent electrical gremlins and restore your peace of mind. This module is a direct-fit, pre-programmed solution for a wide array of GM vehicles, including the Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, and Cadillac Escalade.
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ HVAC blower motor not working or climate controls behaving erratically.
- ✔ Airbag warning light illuminated on the dash, often with DTC B1001.
- ✔ Interior dome lights or exterior lights staying on or not turning on at all.
- ✔ Vehicle security system malfunctioning, causing no-start conditions or false alarms.
- ✔ Unexplained battery drain while the vehicle is parked.
- ✔ Communication errors with other vehicle modules, leading to various warning lights.
Plug-and-Play Solution
Forget expensive dealership visits and programming fees. We pre-program this module to your vehicle’s specific VIN, ensuring it works correctly right out of the box. The software is loaded with the latest updates from General Motors for optimal performance and reliability. Installation is simple and typically takes just a few minutes, with the BCM located under the driver’s side dashboard near the steering column. While the installation is straightforward, some vehicles may require a post-installation procedure. If the airbag light remains on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ function. This re-syncs the new BCM with the airbag system. This module is a direct replacement for multiple part numbers, including: 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, and 22860591.
Frequently Asked Questions
What does a Body Control Module do on a Silverado 3500?
The BCM acts as a central computer for your truck’s non-engine related electronics. It controls functions like power locks, windows, lights, wipers, the security system, and the HVAC fan speed.
Do I need to program this replacement BCM?
No. This module comes pre-programmed to your vehicle’s VIN. It is a plug-and-play solution that does not require a trip to the dealership for programming.
Where is the BCM located on my 2013 Silverado?
The Body Control Module is typically located under the driver’s side dashboard, to the left of the steering column. Installation usually takes less than 10 minutes.
Why is my airbag light still on after installing the new BCM?
If the airbag light is on, it means the new BCM needs to be synchronized 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 this part?
No, there is no core charge. You can keep your old module without any additional fees or hassle.