Restore Full Electrical Function to Your GM Truck or SUV
Are you battling a storm of strange electrical problems in your Chevrolet Silverado, GMC Sierra, or Tahoe? From flickering lights and unresponsive power windows to a dead HVAC system, these frustrating issues often point to a single culprit: a failing Body Control Module (BCM). The BCM acts as the central command center for your vehicle’s body electronics. When it malfunctions, it can create a cascade of seemingly unrelated problems that are difficult to diagnose. This OEM-quality replacement GM Truck Body Control Module, part number 25844480, is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We had a 2009 Sierra 2500 in the shop that was driving the owner crazy. The radio would change stations on its own, the dome light would stay on, and the power locks worked intermittently. He had already replaced the battery and checked multiple grounds with no success. After a quick scan, we saw several communication codes pointing to the BCM. We installed one of our VIN-programmed modules, and within 10 minutes, every single electrical gremlin was gone. It’s a reminder that sometimes the most complex-seeming problems have a straightforward, central solution.
Common Symptoms of a Failing BCM
- ✔ Unresponsive or erratic power windows, door locks, or interior/exterior lights.
- ✔ HVAC blower motor or climate controls not working correctly.
- ✔ The security system engaging randomly, preventing the vehicle from starting.
- ✔ An illuminated airbag warning light, often with DTC B1001.
- ✔ Intermittent stalling, misfires, or other performance issues linked to poor data communication.
- ✔ Wipers operating on their own or not turning off.
Why Choose Our Pre-Programmed GM Truck Body Control Module?
Getting your truck back on the road shouldn’t require expensive dealership visits and programming fees. We eliminate the hassle by programming this module to your vehicle’s specific VIN before it ships. This ensures it integrates seamlessly with your truck’s existing systems right out of the box. Simply install it, and you’re ready to go. Built to strict OEM standards, this module guarantees reliable, long-term performance. It directly interchanges with a wide range of part numbers, including 15263363, 25835966, 15878753, and 20939137, making it the perfect fit for your repair.
Installation and Post-Install Notes
Installation is typically a simple process. The BCM is located under the driver’s side dashboard, near the steering column. It can usually be swapped out in minutes with basic tools. However, please be aware of a few potential post-installation steps:
- Airbag System Sync: If the airbag 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: Some models may require a brake pedal position sensor relearn to ensure proper brake light and stability control function.
There is no core charge for this part, so you can keep your old module without the hassle of returning it.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer that manages and controls many of your vehicle’s non-engine related functions, such as power windows, locks, lights, wipers, security system, and climate controls.
Is this BCM ready to install right out of the box?
Yes. We pre-program the module to your vehicle’s VIN before shipping, making it a true plug-and-play solution. No further dealership programming is required for standard operation.
Why is my airbag light still on after installing the new BCM?
This is a common security feature. The new BCM needs to be synced with the vehicle’s Sensing and Diagnostic Module (SDM). This requires a professional scan tool to perform the “Setup SDM Primary Key in BCM” function.
Do I need to send my old part back?
No. We do not require a core return for this Body Control Module. You can keep or dispose of your old part at your convenience.
Will this module fit my 2012 GMC Sierra?
This module fits a wide range of GM vehicles from approximately 2007 to 2013. Please verify your vehicle’s year and model in our detailed fitment list or contact us with your VIN to confirm compatibility.