Restore Full Electrical Function to Your GM Truck or SUV
Are you battling frustrating electrical gremlins in your Chevrolet, GMC, or Cadillac? Flickering lights, unresponsive power windows, a dead HVAC blower, or a persistent airbag light are common signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a cascade of confusing issues. This genuine OEM-quality GM 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 2010 Silverado 2500 in the shop that was driving the owner crazy. The radio would cut out, the dome lights would flicker, and the power locks worked only when they wanted to. He had already replaced the battery and checked the alternator. After scanning, we found a slew of communication error codes pointing to the BCM. We installed one of our pre-programmed modules, but before we finished, we did a wiggle test on the main BCM connector and found a poor ground connection at the chassis. After cleaning and securing the ground, the new BCM worked flawlessly. This is a great reminder: a bad BCM can cause these issues, but always verify your grounds during installation to prevent a comeback!
Is Your Vehicle Showing These Symptoms?
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ HVAC controls are unresponsive, or the blower motor works sporadically.
- ✔ Interior or exterior lights (headlights, taillights, dome lights) behaving erratically.
- ✔ An active airbag warning light, often with DTC B1001.
- ✔ Security system malfunctions, causing no-start or stalling conditions.
- ✔ False warnings on the driver information center (DIC).
The Definitive Solution: A Pre-Programmed GM Truck Body Control Module
Don’t settle for a generic part that requires an expensive trip to the dealership for programming. We take the hassle out of the repair process. Simply provide your vehicle’s VIN during checkout, and we will program this module with the latest GM software specific to your truck or SUV. This ensures 100% compatibility and a true plug-and-play installation. This is the most efficient way to get your GM Truck Body Control Module replaced and your vehicle back on the road.
Key Features & Benefits
- ✔ VIN Programmed for You: Arrives ready for installation with no additional programming required. It’s synced to your vehicle’s specific options and configuration.
- ✔ Restores Full Functionality: Corrects common electrical failures and eliminates related diagnostic trouble codes (DTCs).
- ✔ OEM-Standard Quality: Built to meet or exceed General Motors’ specifications for durability and performance, backed by a one-year warranty.
- ✔ Wide Compatibility: This module is a direct replacement for a range of part numbers, including 20939137, 25835966, 15943678, 22860591, and more.
- ✔ No Core Charge: Keep your old part. There’s no need to worry about core returns or extra charges.
Installation & Post-Install Notes
The BCM is typically located under the driver’s side dashboard, near the steering column. Installation is straightforward for most DIY mechanics and can be completed in under 30 minutes. However, please be aware of 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 to sync the systems.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure proper brake light and traction control operation.
Always consult a factory service manual for your specific vehicle if you are unsure about any step of the process. Replacing your faulty GM Truck Body Control Module is a critical repair that brings your vehicle’s comfort and safety systems back online.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
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 HVAC fan speeds.
Why is VIN programming so important for a BCM?
VIN programming loads your vehicle’s specific software and options into the module. Without it, the BCM won’t know how to communicate with other modules, leading to features not working correctly or the vehicle not starting at all. Our pre-programming saves you a trip to the dealer.
Is this part difficult to install myself?
For most individuals with basic mechanical skills, the physical installation is simple and takes less than 30 minutes. It’s typically located under the driver’s dash. However, be prepared for potential electronic relearn procedures as mentioned above.
What if my airbag light is on after I install this BCM?
This is a known possibility. It means the new BCM needs to be electronically ‘introduced’ to the airbag system’s Sensing and Diagnostic Module (SDM). A procedure called ‘Setup SDM Primary Key in BCM’ must be performed with a compatible high-end scan tool to resolve this.
Is this a new or used part?
This is a high-quality, OEM-standard component that has been expertly prepared and programmed for your vehicle, ensuring reliable performance and longevity. It is backed by our one-year warranty.
Do I need to send my old BCM back?
No. This product comes with no core charge, so you can keep your original module without any extra fees or hassle.