Restore Your Truck’s Core Electrical Functions
Are strange electrical problems plaguing your 2013 GMC Sierra 3500? From flickering lights and malfunctioning door locks to an unresponsive HVAC system, a failing Body Control Module (BCM) can turn your dependable workhorse into a source of constant frustration. This genuine GM BCM, interchangeable with part number 25844480, is the definitive solution. We deliver it pre-programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and ensuring a seamless, plug-and-play installation right out of the box.
Common Symptoms & Your Solution
A faulty BCM is the hidden cause behind many perplexing electrical issues. If you’re experiencing any of the following, this module is the reliable fix you need to restore order. The GMC Sierra 3500 Body Control Module is central to your truck’s operation, and replacing a failing one is critical.
- Intermittent or total loss of HVAC blower and climate controls.
- Power windows, door locks, or exterior/interior lights not working correctly.
- Airbag warning light is illuminated, often with Diagnostic Trouble Code (DTC) B1001.
- Security system malfunctions, causing no-start conditions or random stalling.
- A variety of other body-related DTCs that point to a communication failure.
Features & Benefits
- ✔ Pre-Programmed for Your VIN: Arrives ready for installation with the latest GM software updates for your specific truck. This ensures perfect communication between modules and avoids all programming hassles.
- ✔ Restore Full Functionality: Get your power accessories, climate control, lighting, and security systems working exactly as they should, providing a comfortable and safe driving experience.
- ✔ OEM-Standard Quality: Engineered to meet strict General Motors specifications, this module provides the same reliability and performance as the original part that came with your truck.
- ✔ Direct Interchange Solution: This unit is a direct replacement for a wide range of part numbers, including 25835966, 15263363, 15878753, 15943678, 25790508, 20939137, and 22860591, guaranteeing a perfect fit.
- ✔ No Core Charge Required: Save time and money with our straightforward process. You are not required to return your old, faulty module.
- ✔ Warranty Coverage: This unit is backed by our one-year replacement warranty.
A Veteran Technician’s Insight: After 20 years under the hood of GM trucks, I’ve seen countless hours wasted chasing electrical gremlins that all led back to one component: the BCM. The symptoms—a window that won’t go down, a blower motor that quits—can seem random and unrelated. But the BCM is the central hub for all these functions. Installing a properly programmed GMC Sierra 3500 Body Control Module isn’t just swapping a part; it’s restoring the vehicle’s electronic nervous system. This is the correct fix that gets the job done right the first time, saving you from frustrating diagnostic dead ends.
Don’t let a faulty BCM compromise the utility and reliability of your truck. This pre-programmed module is the most efficient and dependable way to solve your vehicle’s electrical issues and get back on the road with confidence. With a straightforward installation process, you can have your Sierra 3500’s essential features fully restored in minutes.
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, the security system, interior and exterior lighting, wipers, and the HVAC system.
Is this BCM truly plug-and-play?
Yes. We program the module to your vehicle’s specific VIN before shipping. This means it’s ready for installation upon arrival without requiring any additional programming from a dealership or mechanic.
What if my airbag light stays on after installation?
In some cases, particularly if DTC B1001 was present, the new BCM may need to be synced with the airbag system’s Sensing and Diagnostic Module (SDM). This is done with a professional scan tool using the ‘Setup SDM Primary Key in BCM’ function, a simple procedure for any qualified technician.
Where is the BCM located on my 2013 Sierra 3500?
The GMC Sierra 3500 Body Control Module is typically located under the driver’s side of the dashboard, near the steering column. It’s generally accessible for a quick replacement.
Do I need to send my old BCM back?
No. There is no core charge for this part. You can keep or dispose of your old module, making the replacement process faster and more convenient for you.
Which part numbers does this module replace?
This BCM is a direct interchange for many part numbers, including 15878753, 25835966, 15263363, 15943678, 20939137, 22860591, and more. It is designed to fit a wide range of 2007-2013 GM trucks and SUVs.