Restore Full Electrical Function to Your GM Truck or SUV
Is your Chevrolet Silverado, GMC Sierra, or Cadillac Escalade plagued by frustrating electrical problems? Flickering lights, unresponsive power windows, a malfunctioning security system, or erratic HVAC controls are all classic signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a cascade of confusing issues. This genuine GM Body Control Module, part number 20939138, is the definitive solution to restore your vehicle’s performance and reliability.
Expert Pro Tip
Expert Pro Tip
Before replacing your BCM, always perform a thorough check of the main battery ground cable and the chassis ground points, especially the one located under the driver’s door. A poor ground connection can mimic the symptoms of a faulty BCM and is a much simpler fix. A quick inspection can save you time and money.
Is Your Body Control Module Failing?
A faulty BCM can manifest in numerous ways, often making diagnosis difficult. If you’re experiencing any of the following, a replacement module is likely the answer:
- ✔ Unresponsive or intermittent power windows, door locks, or interior/exterior lights.
- ✔ HVAC system failures, such as a blower motor that won’t turn on or climate controls that don’t work.
- ✔ An illuminated airbag warning light, often accompanied by diagnostic trouble code (DTC) B1001.
- ✔ Security system malfunctions, leading to no-start conditions, stalling, or misfires.
- ✔ A variety of seemingly unrelated electrical gremlins that come and go without a clear cause.
The Plug-and-Play Solution for Your 2013 Silverado 3500 BCM
What sets our modules apart is the essential VIN programming service included with every purchase. We flash the module with your vehicle’s specific VIN and the latest GM software updates before it ships. This means the part arrives at your door ready for a true plug-and-play installation, eliminating the need for an expensive trip to the dealership for programming. This service ensures perfect communication between the new BCM and your vehicle’s other electronic systems, restoring full functionality right out of the box.
This module is a direct replacement for a wide range of GM trucks and SUVs from 2007 to 2013, making it a versatile and reliable repair part. It is interchangeable with numerous part numbers, including 25844480, 25835966, 15943678, 20939137, and 22860591, among others. Built to strict OEM standards, it comes with a one-year warranty for your peace of mind.
Installation and Post-Install Considerations
Installation is typically straightforward. The BCM is located under the driver’s side dashboard, near the steering column. In most cases, it’s a simple process of disconnecting the old module and plugging in the new one, taking less than 15 minutes. However, please be aware of potential post-installation procedures:
- Airbag System Sync: If the airbag warning light remains on after installation, a procedure called ‘Setup SDM Primary Key in BCM’ must be performed using a professional-grade scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure correct brake light and traction control operation.
These procedures are not always necessary but are important to be aware of. Always consult a factory service manual or a qualified technician if you are unsure. With our pre-programmed 2013 Silverado 3500 BCM, you are starting with the most critical step already completed.
Frequently Asked Questions
Expert Pro Tip
Before replacing your BCM, always perform a thorough check of the main battery ground cable and the chassis ground points, especially the one located under the driver’s door. A poor ground connection can mimic the symptoms of a faulty BCM and is a much simpler fix. A quick inspection can save you time and money.