Fix Persistent Electrical Problems in Your GM Truck
Are you battling strange and frustrating electrical issues in your GMC Sierra, Chevrolet Silverado, or other GM truck? Flickering lights, unresponsive power windows, a malfunctioning HVAC system, or random warning lights are all classic 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 seemingly unrelated problems. This VIN-programmed Body Control Module, compatible with part number 15926094, is the definitive solution to restore your truck’s full functionality and reliability.
From the Diagnostic Bay
We had a 2010 Sierra 2500 in the shop that was driving the owner crazy. The radio would turn off, the driver’s side window wouldn’t work, and the airbag light was on with a B1001 code. The owner had already replaced the battery and checked fuses with no luck. After a quick scan, we confirmed communication issues with the BCM. A quick check under the dash revealed no obvious wiring damage. We installed one of our VIN-programmed BCMs, and within minutes, the windows, radio, and locks were all working perfectly. After performing the ‘Setup SDM Primary Key’ procedure with our scan tool, the airbag light was gone for good. It’s a reminder that a single module can be the root of many headaches.
Symptoms of a Failing Sierra 2500 Body Control Module
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s highly likely your BCM is the culprit:
- ✔ Unresponsive or erratic power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ HVAC and climate control systems that won’t turn on or operate incorrectly.
- ✔ An illuminated airbag warning light, often with DTC B1001.
- ✔ Vehicle security system faults or the engine failing to start.
- ✔ Intermittent stalling, misfires, or poor grounding symptoms.
- ✔ A variety of diagnostic trouble codes (DTCs) related to body systems.
Plug-and-Play Solution with VIN Programming
Don’t waste time and money at the dealership. This module comes expertly pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the BCM communicates flawlessly with your truck’s other electronic systems right out of the box. All the latest software updates from GM are applied, providing optimal performance and resolving common factory issues. Simply install the module, and you’re ready to go, with no additional programming required for most functions.
Installation and Post-Install Procedures
The BCM is typically located under the driver’s side dashboard, near the steering column, making for a straightforward replacement that often takes less than 15 minutes. While the module is plug-and-play, be aware of a few potential post-installation steps:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a technician will need to use a professional scan tool 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 necessary to ensure correct brake light and traction control operation.
This module is a direct replacement for multiple part numbers, including 25844480, 25835966, 15943678, 15926094, 20939137, 22860591, and others, ensuring wide compatibility across the GM truck and SUV lineup from 2007-2013. Restore your vehicle’s electronic systems with confidence.
Frequently Asked Questions
Do I need to have a dealership program this BCM?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you a trip to the dealer and additional programming fees.
Where is the BCM located on my 2008 GMC Sierra?
The Body Control Module is located on the driver’s side, under the dashboard near the steering column. It is a relatively accessible part for replacement.
What if my airbag light is on after installing the new BCM?
This is a common security measure. You will need a professional scan tool with the correct functions to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and turn off the light.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without any hassle or need to return it.
Will this part fix my non-working power windows and door locks?
Yes, the BCM directly controls those functions. If your power windows and locks are erratic or have stopped working, a failing BCM is the most common cause, and this part is designed to fix that issue.
Is this compatible with a Chevy Silverado or Tahoe?
Yes, this BCM fits a wide range of 2007-2013 GM vehicles, including the Chevrolet Silverado, Tahoe, Suburban, Avalanche, and the Cadillac Escalade. Please check the fitment list to confirm for your specific model.