Restore Full Electrical Function to Your GM Truck
Is your GMC Sierra, Chevrolet Silverado, or Cadillac Escalade plagued by bizarre electrical issues? The Body Control Module (BCM) is the central command unit for your vehicle’s body electronics, and when it fails, it can cause a cascade of frustrating problems. This genuine OEM-quality Body Control Module, part number 25971917, is the definitive solution. It arrives pre-programmed to your vehicle’s specific VIN, ensuring a seamless, plug-and-play installation that gets you back on the road without a costly trip to the dealership.
From the Diagnostic Bay
We had a 2009 Sierra 2500 in the shop that was driving the owner crazy. The wipers would turn on randomly, the driver’s side power window worked intermittently, and the radio would shut off unexpectedly. He had already replaced the window switch and checked the wiper motor. After hooking up our scanner, we saw a handful of communication error codes pointing toward the BCM. A quick check of the main ground near the BCM confirmed it was solid. We installed a VIN-programmed module, and within 10 minutes, every single issue was resolved. It’s a powerful reminder that what seems like multiple separate problems often traces back to this single, critical component.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting behavior.
- ✔ HVAC and climate control systems functioning incorrectly.
- ✔ Vehicle security system malfunctions or false alarms.
- ✔ Airbag warning light illuminated on the dash, often with DTC B1001.
- ✔ Unexplained battery drain when the vehicle is off.
- ✔ Communication errors with other vehicle modules.
The Definitive Solution: A Programmed Sierra 3500 Body Control Module
Don’t settle for a generic part that requires expensive dealer programming. Our expert technicians program this Sierra 3500 Body Control Module with the latest GM software updates using your vehicle’s VIN. This critical step ensures that all onboard systems communicate correctly from the moment of installation. It’s a direct-fit replacement for a wide range of GM trucks and SUVs from 2007-2013, including the Silverado, Tahoe, Suburban, Yukon, and Escalade, restoring factory performance and reliability.
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. The physical swap takes only a few minutes. However, please be aware of potential post-installation procedures:
- Airbag System Sync: If the airbag light remains on after installation, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ function. This re-establishes communication between the new BCM and the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure proper brake light and traction control operation.
This module comes with a one-year warranty and requires no core charge, allowing you to complete your repair without the hassle of returning the old part.
Frequently Asked Questions
What does a Body Control Module do on a GMC Sierra?
The BCM acts as the central computer for your truck’s body electronics. It controls non-engine related functions like power windows, door locks, interior/exterior lights, wipers, the security system, and HVAC controls.
Is this BCM truly plug-and-play?
Yes, because we pre-program it to your vehicle’s VIN, it is ready for installation right out of the box. It eliminates the need for dealership programming for the module itself. Some vehicles may require a simple relearn procedure for specific systems like the airbag, as noted in the description.
What if my airbag light is on after installation?
This is a common occurrence. It means the new BCM needs to be electronically ‘introduced’ to your vehicle’s airbag module (SDM). A mechanic with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
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 additional fees or hassle.
How can I be sure this part number fits my vehicle?
This module is a direct replacement for multiple part numbers, including 25971917, 25844480, 25835966, and others listed. Please check the fitment list on this page or contact us with your VIN to confirm compatibility for your exact truck or SUV.