Is Your Silverado Plagued by Baffling Electrical Problems?
The Body Control Module (BCM) is the central command center 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 create a cascade of frustrating and seemingly unrelated issues, making your reliable truck feel unpredictable. This genuine OEM-quality Body Control Module, part number 25971917, is the definitive solution to restore full electrical functionality to your vehicle.
Symptoms of a Failing Silverado 3500 Body Control Module
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
Common Failure Indicators
- ✔ 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.
- ✔ Security system malfunctions, causing no-start conditions or random alarm activation.
- ✔ Interior or exterior lights (headlights, taillights, dome lights) not working correctly.
- ✔ A variety of communication-related Diagnostic Trouble Codes (DTCs).
The Plug-and-Play Advantage: Pre-Programmed for Your Truck
Don’t waste time and money at the dealership. We program this module to your vehicle’s specific VIN before it ships. This ensures that it integrates seamlessly with your truck’s existing systems right out of the box. The programming includes the latest GM software updates to ensure optimal performance and reliability. This is a true plug-and-play solution designed for a hassle-free installation.
Installation and Post-Install Notes
The BCM is typically located under the driver’s side dashboard, near the steering column. The physical replacement is straightforward and often takes just a few minutes. However, please be aware of potential post-installation procedures:
- Airbag System Sync: If the airbag warning light is on after installation, a procedure called ‘Setup SDM Primary Key in BCM’ must be performed with 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 relearn to ensure proper brake light and traction control operation.
This module is a direct replacement for multiple part numbers, including 25844480, 25835966, 15943678, 20939137, 22860591, and more. With no core charge, you can simply replace your faulty part without the hassle of returning the old one. Get your truck’s essential features working perfectly again.
Frequently Asked Questions
What does the Body Control Module do on my Silverado 3500?
The BCM acts as the main computer for your truck’s comfort and convenience features. It controls the power windows, door locks, security system, lighting, wipers, and HVAC system, ensuring they all work together correctly.
Is this part difficult to install?
The physical installation is very simple, usually taking less than 15 minutes. It’s located under the dashboard and just requires unplugging the old module and plugging in the new one. However, some vehicles may require a simple electronic relearn procedure with a scan tool for the airbag or brake systems.
Do I need to take my truck to the dealer for programming?
No. This module comes pre-programmed to your vehicle’s VIN. This means it’s ready for installation right out of the box, saving you the time and expense of a dealership visit.
Why is my airbag light on after installing the new BCM?
This can happen because the new BCM needs to be electronically introduced to the airbag system’s computer (SDM). A professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ function to sync the modules and turn off the light.
Will this BCM fix my non-working power windows and locks?
Yes, if the Body Control Module is the cause of the failure. Faulty power windows, locks, and lights are classic symptoms of a failing BCM, and replacing it with this programmed unit is the correct repair.