Restore Full Electrical Function to Your GM Truck or SUV
Are you battling a cascade of bizarre electrical issues in your GMC Sierra, Chevy Silverado, or Tahoe? One moment the power windows work, the next they don’t. The HVAC blower has a mind of its own, and mysterious warning lights appear on your dash. These are classic signs of a failing Body Control Module (BCM), the central nervous system for your vehicle’s electronic accessories. A faulty BCM can disrupt everything from your interior lights and security system to your power locks and climate control, making your vehicle unreliable and frustrating to drive.
Expert Pro Tip
Expert Pro Tip
Before condemning your BCM, always perform a thorough check of the main battery ground cable and the chassis ground points, especially the one near the BCM’s location under the dash. A loose or corroded ground can mimic BCM failure and is a much simpler fix. A quick check can save you time and money.
Common Symptoms of a Failing GM BCM
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ HVAC controls not responding or blower motor working erratically.
- ✔ Exterior or interior lights failing to turn on or off correctly.
- ✔ An active airbag warning light, often with diagnostic trouble code B1001.
- ✔ Security system malfunctions, causing no-start or stalling conditions.
- ✔ Unexplained battery drain when the vehicle is off.
- ✔ Inconsistent wiper operation.
The Plug-and-Play Fix: Your Programmed GMC Sierra BCM
This genuine OEM-quality Body Control Module, part number 25844480, is the definitive solution to restore your truck’s full electrical functionality. Unlike modules from a salvage yard or a dealership that requires expensive programming, this unit arrives at your door pre-programmed to your vehicle’s specific VIN. This crucial step ensures that all systems communicate correctly right out of the box, making the installation process simple and straightforward. By installing our programmed GMC Sierra BCM, you bypass the need for a trip to the dealer, saving you hundreds of dollars in labor and programming fees.
Installation and Post-Install Procedures
Physically installing the BCM is a quick process, typically taking less than 15 minutes. The module is located under the driver’s side dashboard, near the steering column. While the unit is plug-and-play for most functions, some vehicles may require post-installation steps for specific systems:
- Airbag System Sync: If the airbag warning light remains on after installation, a technician will need to perform the ‘Setup SDM Primary Key in BCM’ procedure using a professional scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor relearn may be necessary to ensure proper brake light and traction control operation.
This module is a direct replacement for a wide range of GM vehicles from 2007-2013 and interchanges with part numbers including 15263497, 25835966, 15878753, 20939137, and 22860591.
Frequently Asked Questions
Expert Pro Tip
Before condemning your BCM, always perform a thorough check of the main battery ground cable and the chassis ground points, especially the one near the BCM’s location under the dash. A loose or corroded ground can mimic BCM failure and is a much simpler fix. A quick check can save you time and money.