Restore Full Electrical Function to Your GM Truck or SUV
Are you battling a frustrating array of electrical gremlins in your vehicle? From flickering lights and unresponsive power windows to a malfunctioning HVAC system, these are classic signs of a failing Body Control Module (BCM). The BCM acts as the central command center for your vehicle’s body electronics. When it fails, it can cause widespread and confusing issues. This genuine OEM-quality GM Body Control Module, interchangeable with part number 20939137, is the definitive solution for your 2007-2013 GM truck or SUV, including the GMC Sierra, Chevrolet Silverado, Tahoe, and Cadillac Escalade.
Symptoms of a Failing Body Control Module
- ✔ Unresponsive or erratic power windows, door locks, and interior/exterior lights.
- ✔ HVAC system failures, such as a blower motor that won’t turn on or is stuck at one speed.
- ✔ Illuminated airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Security system malfunctions, including random alarm activation or a no-start condition.
- ✔ Intermittent stalling, misfires, or other performance issues related to poor data communication.
- ✔ A variety of communication-related DTCs stored in the vehicle’s computer system.
Why Choose Our Programmed 2013 Sierra Body Control Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We pre-program the module to your vehicle’s specific Vehicle Identification Number (VIN) before shipping. This critical step ensures that the BCM communicates flawlessly with your vehicle’s other electronic systems right out of the box. You can bypass the expensive trip to the dealership for programming, saving you both time and money. Installation is straightforward, typically located under the driver’s side dash, and can be completed in minutes.
In some cases, particularly if an airbag light was present, a post-installation procedure called ‘Setup SDM Primary Key in BCM’ may be required. This is a simple sync function that can be performed with a compatible high-level scan tool and ensures the airbag system (SDM) and the new BCM are properly paired.
Frequently Asked Questions
What does the Body Control Module (BCM) do?
The BCM is a computer that controls and monitors many of the non-engine related functions in your vehicle. This includes power windows, door locks, the security system, interior and exterior lighting, wipers, and the climate control system.
Does this module need to be programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before it ships. This makes it a plug-and-play installation, with no need for additional, expensive dealership programming.
Where is the BCM located on my 2013 GMC Sierra?
The BCM is typically located under the driver’s side of the dashboard, near the steering column. It is an accessible component that can be replaced with basic hand tools.
My airbag light is on. Will this BCM fix it?
If the airbag light is caused by a faulty BCM (often with code B1001), this part will resolve the issue. After installation, you may need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a professional scan tool to sync the systems and clear the light.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old, faulty module back to us, saving you time and hassle.
Which part numbers does this module replace?
This module is a direct replacement for a wide range of part numbers, including 25835966, 15263363, 15943678, 25790508, 25844479, 20939137, 20939138, and 22860591, among others.