Is Your GM Truck or SUV Experiencing Bizarre Electrical Issues?
If you’re dealing with flickering lights, a non-responsive HVAC system, power windows with a mind of their own, or mysterious warning lights on your dash, the culprit is likely a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it starts to fail, it can cause a cascade of frustrating and difficult-to-diagnose problems. This genuine quality GM BCM, part number 25844480, is the definitive solution to restore order and reliability to your vehicle.
Expert Pro Tip
Expert Pro Tip
Before replacing your BCM, always perform a thorough check of the main ground connections, especially the one located on the driver-side A-pillar behind the kick panel. A loose or corroded ground can cause identical symptoms to a faulty BCM and is a much simpler fix. Ensuring your grounds are clean and tight can prevent misdiagnosis and protect your new module.
Symptoms of a Failing GM Body Control Module
A bad BCM can manifest in numerous ways. If you’re noticing any of the following, it’s time to consider a replacement:
- ✔ Intermittent or total loss of power windows, door locks, or interior lighting.
- ✔ HVAC controls not working correctly, or the blower motor behaving erratically.
- ✔ The security system acting up, causing no-start conditions or random alarm activation.
- ✔ An airbag warning light that won’t turn off, often accompanied by DTC B1001.
- ✔ A variety of seemingly unrelated diagnostic trouble codes (DTCs) stored in the system.
- ✔ Erratic wiper operation or exterior lights that stay on or won’t turn on.
Why Choose Our Programmed GM BCM?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We pre-program each module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This critical step ensures seamless integration with your truck’s existing electronic systems. You get the benefit of the latest GM software updates without the time and expense of a dealership visit for programming. This plug-and-play convenience gets your vehicle back on the road faster and with less hassle.
Simple Installation and Post-Install Notes
Installation is straightforward for most DIY mechanics. The BCM is typically located under the driver-side dashboard, near the steering column, and can be swapped out in minutes. While our VIN programming handles the majority of the setup, please be aware of these potential post-installation procedures:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ function. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure correct brake light and traction control operation.
This module is a direct replacement for a wide range of part numbers, including: 15263497, 25835966, 15263363, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, and 22860591.
Frequently Asked Questions
Expert Pro Tip
Before replacing your BCM, always perform a thorough check of the main ground connections, especially the one located on the driver-side A-pillar behind the kick panel. A loose or corroded ground can cause identical symptoms to a faulty BCM and is a much simpler fix. Ensuring your grounds are clean and tight can prevent misdiagnosis and protect your new module.