Experiencing Baffling Electrical Problems in Your GM Truck?
If your 2007-2013 GMC Sierra, Chevrolet Silverado, or other GM truck is suffering from a host of strange electrical issues—like power windows that won’t budge, intermittent HVAC controls, or a security system that acts up—the culprit is often a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it malfunctions, it can create a cascade of frustrating and seemingly unrelated problems. This genuine GM BCM, part number 25790508 (interchangeable with 25844480), is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
Common Symptoms of a Failing BCM
A faulty BCM can manifest in numerous ways. If you’re noticing any of the following issues, it’s a strong indicator that your module needs replacement:
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights (headlights, dome lights, dash lights) staying on, flickering, or failing to work.
- ✔ HVAC system problems, such as the blower motor not working or temperature controls being unresponsive.
- ✔ An illuminated airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Vehicle security system malfunctions, leading to no-start conditions or random alarm activation.
- ✔ Wipers behaving unpredictably, either not working or activating on their own.
- ✔ Communication errors with other vehicle modules, leading to a variety of DTCs.
The Direct-Fit Solution: Your Pre-Programmed Sierra 3500 Body Control Module
Don’t waste time and money on a trip to the dealership for expensive programming. We handle the critical step for you. By providing your vehicle’s VIN at checkout, we program this module with the latest GM software specific to your truck. This ensures that all onboard systems communicate perfectly from the moment you plug it in. This process restores factory functionality and resolves common electronic conflicts that can arise from using a non-programmed module. This replacement for your Sierra 3500 Body Control Module is the most efficient way to get your truck back to 100%.
Installation and Post-Install Procedures
Physically installing the BCM is straightforward. It is typically located under the driver’s side dashboard, near the steering column, and can be swapped out in minutes with basic tools. However, after installation, some vehicles may require additional electronic syncing.
- Airbag System Sync: If the airbag warning light remains on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is necessary. This requires a professional-grade scan tool and syncs the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be needed to ensure correct operation of the brake lights and stability control systems.
This module is a direct replacement for numerous part numbers, including: 25835966, 15263363, 15263497, 15878753, 25790508, 25844480, 20939137, and 22860591. Restore your vehicle’s performance and reliability with this essential component.
Frequently Asked Questions
What does a Body Control Module do in my truck?
The BCM acts as the central computer for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, wipers, the security system, and the HVAC fan and blend doors.
Why is VIN programming so important?
VIN programming loads your vehicle’s specific software and configurations onto the module. This ensures it communicates correctly with all other computers in your truck, enabling all features to work as intended without a trip to the dealer.
Is this part difficult to install myself?
The physical installation is simple, usually taking less than 15 minutes with basic tools as it’s located under the steering column. However, be aware that post-installation electronic procedures, like an airbag system sync, may require a professional scan tool.
What if my airbag light is on after installing the new BCM?
This is a common occurrence. It means the new BCM needs to be electronically introduced to the airbag system (SDM). A mechanic with a high-level scan tool can perform the ‘Setup SDM Primary Key in BCM’ function to resolve this.
Do I need to return my old BCM?
No. This product comes with no core charge, so you can keep your old part without any additional fees or hassle.
Will this BCM fit other GM vehicles?
Yes, this module is compatible with a wide range of 2007-2013 GM trucks and SUVs, including the Chevrolet Silverado, Suburban, Tahoe, Avalanche, and the Cadillac Escalade. Please verify the part number for your specific vehicle.