Restore Full Electrical Function to Your GM Truck or SUV
Are you battling frustrating electrical problems in your GMC Sierra, Chevy Silverado, or Tahoe? A faulty Body Control Module (BCM) is often the culprit behind issues like erratic lights, non-working power windows, malfunctioning HVAC controls, and persistent warning lights. This genuine GM BCM, part number 25844480, is the definitive solution. It arrives expertly programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and ensuring a seamless, plug-and-play installation.
We had a 2013 GMC Sierra 2500 in the shop that was a real head-scratcher. The owner reported the radio would turn on by itself, the dome lights would flicker, and the power locks worked intermittently. A scan tool showed a dozen communication codes, all pointing to a network issue. After checking the main grounds and connectors, we isolated the problem to the BCM. It was failing internally, sending corrupt data across the CAN bus and causing chaos. Installing a VIN-programmed BCM like this one resolved all issues in under 10 minutes. The truck went from being an electronic nightmare to perfectly functional.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ HVAC blower motor or climate controls not working correctly.
- ✔ Exterior or interior lights behaving erratically or not turning on.
- ✔ An active airbag warning light, often with DTC B1001.
- ✔ Security system malfunctions, causing no-start or stalling conditions.
- ✔ False warnings on the instrument cluster.
Why Choose Our 2013 Sierra Body Control Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution for your vehicle. We handle the complex programming so you don’t have to. By matching the module to your VIN, we ensure all factory-installed options and security protocols work correctly right out of the box. This module governs the core electronic convenience and safety features of your vehicle, and a properly functioning unit is essential for a reliable driving experience. Built to strict OEM standards, it guarantees the performance and longevity your GM vehicle deserves.
Installation and Post-Install Notes
The BCM is typically located under the driver’s side dashboard, near the steering column. Installation is a straightforward process of disconnecting the battery and swapping the electrical connectors. However, please be aware of these potential post-installation steps:
- Airbag System Sync: If the airbag light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is required. This must be done with a professional-grade scan tool to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure correct brake light and traction control operation.
This module is a direct replacement for part numbers: 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, and 22860591.
Frequently Asked Questions
What does the Body Control Module (BCM) do?
The BCM is a computer that controls many of your vehicle’s non-engine related electronic functions. This includes power windows, door locks, interior and exterior lighting, wipers, the security system, and HVAC controls.
Is this module ready to install when I receive it?
Yes. We pre-program the module to your vehicle’s VIN before shipping. This ensures it is a plug-and-play installation with no additional dealership programming required for most functions.
My airbag light is on after installing the new BCM. What should I do?
This is a normal security procedure. You will need a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function to sync the new module with your vehicle’s airbag system and turn off the light.
Do I have to send my old BCM back?
No. There is no core charge for this part. You can keep your old module without any extra fees.
How can I be sure this fits my 2013 Sierra?
This module fits a wide range of 2007-2013 GM trucks and SUVs, including the Sierra. Providing your VIN during checkout guarantees we program it correctly for your specific vehicle and options. It is a direct replacement for part number 15263497.