Restore Full Electrical Function to Your GM Truck or SUV
Are you battling bizarre electrical gremlins in your GMC Sierra, Chevy Silverado, or Tahoe? Do your power windows have a mind of their own, your HVAC system refuse to cooperate, or your dashboard light up with random warnings? These are classic symptoms of a failing Body Control Module (BCM). This genuine GM BCM, part number 25844480, is the definitive, pre-programmed solution to restore your vehicle’s full functionality and your peace of mind. As the central command for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and difficult-to-diagnose issues.
Common Symptoms of a Failing BCM
- ✔ Unresponsive or erratic power windows, door locks, and interior/exterior lights.
- ✔ HVAC system failures, including a blower motor that won’t turn on or works intermittently.
- ✔ An illuminated airbag warning light, often with diagnostic trouble code (DTC) B1001.
- ✔ Security system malfunctions that may prevent the vehicle from starting or cause stalling.
- ✔ Stalling, misfires, or other strange engine behavior tied to electrical grounding problems.
- ✔ A variety of communication-related DTCs stored in the vehicle’s memory.
The Plug-and-Play Solution: Your Programmed Sierra Body Control Module
Avoid the time, expense, and hassle of a dealership visit. We handle the complex programming for you. This module arrives pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN), ensuring it works correctly right out of the box. This critical step integrates the BCM with your truck’s other electronic systems, like the engine controller and anti-theft system, using the latest GM software updates. This isn’t just a replacement part; it’s a complete restoration of your vehicle’s electronic nervous system, solving common DTCs without any further setup.
Installation and Required Procedures
Physically installing the BCM is straightforward for any DIYer or professional technician. It’s typically located under the driver’s side dashboard near the steering column and can be swapped in minutes. However, after installation, some vehicles may require additional electronic steps to ensure all systems are synchronized:
- Airbag System Sync: If the airbag warning light remains on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool and syncs the new BCM with the airbag system to clear the light.
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor relearn may be necessary to ensure brake lights and the traction control system function correctly.
This module is a direct replacement for a wide range of part numbers, including: 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, and 22860591.
Frequently Asked Questions
What does a Body Control Module do?
The BCM acts as the central computer for your vehicle’s body electronics. It controls non-engine related functions like power windows, door locks, interior and exterior lighting, wipers, the security system, and HVAC blower controls.
Is this BCM difficult to install?
The physical installation is very simple, usually taking less than 5 minutes. It’s located under the steering column and just requires unplugging the old one and plugging in the new one. However, some vehicles may require a post-installation electronic procedure like an airbag system sync, which requires a professional scan tool.
Why is VIN programming so important?
VIN programming loads your vehicle’s specific software and security information onto the BCM. Without it, the module won’t be able to communicate correctly with other computers in your truck, leading to a no-start condition or malfunctioning features. Our pre-programming service makes it a plug-and-play part.
Will this fix my airbag light with code B1001?
A faulty BCM is a common cause of the B1001 code. Replacing it often resolves the issue, but you may need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a scan tool after installation to fully sync the systems and turn off the light.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your old module without any extra fees or hassle.