Is Your GMC Sierra Experiencing Strange Electrical Problems?
If your 2007-2013 GMC Sierra, Chevy Silverado, or other GM truck is suffering from a frustrating array of electrical issues, a failing Body Control Module (BCM) is the most likely culprit. The BCM acts as the central command center for your vehicle’s body electronics. When it malfunctions, you can experience everything from flickering lights and non-working power windows to security system faults and even no-start conditions. This genuine GM BCM, part number 25844480, is the definitive solution to restore your truck’s functionality and reliability.
Common Symptoms of a Failing BCM
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or failing to turn on.
- ✔ HVAC and climate control functions becoming unresponsive.
- ✔ The security system engaging randomly, causing the horn to sound or preventing the engine from starting.
- ✔ An airbag warning light on the dash, often accompanied by DTC B1001.
- ✔ Wipers behaving unpredictably or not working when commanded.
- ✔ Communication errors with other vehicle modules, leading to a host of confusing diagnostic codes.
Why Choose Our VIN-Programmed 2013 Sierra Body Control Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We pre-program the module to your vehicle’s specific Vehicle Identification Number (VIN) before shipping. This critical step ensures that the BCM communicates flawlessly with your truck’s existing systems right out of the box. You can bypass the expensive trip to the dealership for programming, making for a simple and cost-effective repair. Located under the driver’s side dash, installation typically takes just a few minutes. While the physical swap is easy, be aware that some vehicles may require a ‘Setup SDM Primary Key’ procedure with a professional scan tool if the airbag light persists after installation.
Frequently Asked Questions
What does a Body Control Module do on a 2013 GMC Sierra?
The BCM is a computer that manages and controls a wide range of non-engine related functions, including the power windows, door locks, interior and exterior lighting, security system, wipers, and climate controls.
Is this BCM truly plug-and-play?
Yes, because we program it to your vehicle’s VIN before it ships, it is ready for installation without needing a trip to the dealer for programming. This saves you time and money.
Why is my airbag light still on after installing the new BCM?
This is a common security feature. The new BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure, which resolves the DTC B1001 code and turns off the light.
Where is the BCM located on my truck?
On most 2007-2013 GM trucks and SUVs like the Sierra, Silverado, and Tahoe, the BCM is located under the driver’s side of the dashboard, near the steering column.
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.