Restore Full Electrical Function to Your GM Truck
Are you battling frustrating electrical gremlins in your 2007-2011 GMC Sierra 3500, Chevrolet Silverado, or other compatible GM truck or SUV? A faulty Body Control Module (BCM) is often the culprit behind a host of baffling issues, from flickering lights and non-responsive power windows to security system errors and dead batteries. This genuine quality GM Body Control Module, interchangeable with part number 25835966, is the definitive solution. It arrives pre-programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and ensuring a seamless, plug-and-play installation.
Common Symptoms of a Failing Sierra 3500 BCM
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ Interior or exterior lights staying on, flickering, or failing to work.
- ✔ HVAC and climate control systems behaving erratically or blower motor failure.
- ✔ Vehicle security system acting up, causing no-start conditions or false alarms.
- ✔ An illuminated airbag warning light, often with DTC B1001.
- ✔ Unexplained battery drain due to the BCM not allowing other modules to sleep.
- ✔ Communication errors with other vehicle modules.
The Plug-and-Play Advantage: Pre-Programmed for Your Truck
The biggest hurdle in replacing a modern vehicle module is programming. We remove that obstacle completely. By providing your vehicle’s VIN during checkout, we program the module with the latest GM software specific to your truck’s configuration. This ensures all existing features work correctly right out of the box. This replacement Sierra 3500 BCM restores the precise control over your vehicle’s body electronics, ensuring everything from your wipers to your key fob works as the factory intended.
Installation and Post-Install Notes
Installation is straightforward for most DIY mechanics. The BCM is typically located under the driver’s side dashboard, near the steering column. While the module is plug-and-play for most functions, please be aware of two potential post-installation procedures:
- Airbag System Sync: If the airbag light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor relearn may be needed to ensure proper brake light and stability control function.
This module is a direct replacement for multiple part numbers, including 25835966, 25844480, 15943678, 20939137, and 22860591. Please verify compatibility with your specific vehicle.
Frequently Asked Questions
What does a BCM do on a 2007-2011 GMC Sierra?
The Body Control Module (BCM) acts as the central computer for your truck’s body electronics. It manages non-engine related functions like power windows, door locks, lighting, HVAC controls, security system, and wipers.
Will this module require programming at the dealership?
No. This module comes pre-programmed to your vehicle’s VIN. This makes the installation plug-and-play, saving you the time and expense of a trip to the dealer for programming.
Is this BCM difficult to install?
The physical installation is relatively simple, typically taking less than 30 minutes. It’s located under the dashboard and involves disconnecting the battery and swapping electrical connectors. However, some post-install electronic procedures may be required, as noted above.
What happens if the airbag light stays on after installation?
If the airbag light remains on, it means the new BCM needs to be electronically 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’ procedure.
Is there a core charge for this part?
No, there is no core charge. You can keep your old module without needing to send it back, saving you hassle and return shipping costs.