Restore Full Control to Your Sierra 3500
Is your GMC Sierra 3500 plagued by bizarre electrical issues? Flickering lights, unresponsive power windows, a malfunctioning HVAC system, or a security light that won’t turn off are more than just annoyances—they’re signs that your Body Control Module (BCM) is failing. This critical component is the central nervous system for your truck’s body electronics. When it fails, it can disrupt your workday and compromise your vehicle’s safety. This genuine-quality GM 25844480 BCM comes pre-programmed to your truck’s specific VIN, providing a direct, reliable solution to get your workhorse back in dependable condition without a costly trip to the dealership.
Common Symptoms & Your Solution
A failing BCM can manifest in numerous ways, often leading to frustrating and difficult-to-diagnose problems. If you’re experiencing any of the following, this module is the definitive solution:
- Intermittent or total loss of interior or exterior lighting
- Power windows, door locks, or mirrors that work sporadically or not at all
- HVAC and climate control blower motor issues
- An airbag warning light on the dash, often with DTC B1001
- Security system malfunctions that may prevent the truck from starting
- Erratic wiper and washer operation
- A host of communication-related Diagnostic Trouble Codes (DTCs)
Installing our 2013 GMC Sierra 3500 BCM programmed to your VIN resolves these issues at their source, restoring the precise, factory-intended operation of your vehicle’s electronics.
Features & Benefits
- ✔ Plug & Play Installation: This BCM arrives pre-programmed to your vehicle’s unique VIN. This eliminates the need for expensive dealership programming, saving you time and money and allowing for a straightforward, direct installation.
- ✔ Restores Full Functionality: Regain complete and reliable control over your truck’s essential body systems, from power locks and windows to the climate control and security system.
- ✔ Solves Annoying Electrical Gremlins: Engineered to OEM specifications, this module provides a stable, long-term fix for the erratic electrical behavior caused by a faulty original BCM.
- ✔ Broad Compatibility: This unit is a direct replacement for a wide range of part numbers, including 25835966, 15263363, 15943678, 20939137, 22860591, and more, ensuring a perfect fit for your specific GM truck or SUV.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: The Importance of a Good Ground
As a technician with over 20 years on the floor, I’ve seen countless electronic components replaced only for the problem to return. On these GM trucks, a weak or corroded ground connection is a common culprit that can mimic BCM failure or even damage a new module. Before installing your new BCM, take 10 extra minutes to locate, remove, and clean the main body ground points under the dash and near the A-pillar. A wire brush and some dielectric grease can be the difference between a successful repair and a recurring headache. A solid ground is the foundation of any healthy electrical system.
Don’t let a faulty module dictate when your truck is ready to work. By installing this expertly prepared 2013 GMC Sierra 3500 BCM programmed specifically for your vehicle, you are not just replacing a part—you are restoring the reliability and functionality you depend on every single day. This is the correct fix to get the job done right, the first time.
Frequently Asked Questions
What does a Body Control Module (BCM) actually do?
The BCM is a computer that acts as the central hub for your truck’s body electronics. It reads inputs from switches (like your window or lock buttons) and sensors, and then sends commands to operate things like your lights, wipers, horn, HVAC blower, and security system.
Is this BCM truly ‘plug-and-play’?
Yes. We program the module to your vehicle’s specific VIN before shipping. This ensures it communicates correctly with your truck’s other computers right out of the box, eliminating the need for dealership tools or programming for most functions.
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 computer (SDM). This is a simple procedure called ‘Setup SDM Primary Key in BCM’ that can be performed with a professional-grade scan tool. It is the only potential post-installation step required.
Do I need to send my old BCM back?
No. There is no core charge for this part. You can keep your old module, which saves you the time and hassle of packaging and shipping it back.
How can I be sure the BCM is the problem?
While a professional diagnosis is always best, a failing BCM is the most common cause of multiple, seemingly unrelated electrical issues. If your power windows, locks, and interior lights are all acting up at once, the BCM is the primary suspect. Our 2013 GMC Sierra 3500 BCM programmed unit is the most reliable fix for these widespread symptoms.
Will this fit models other than the Sierra 3500?
Absolutely. This BCM is compatible with a wide range of 2007-2013 GM trucks and SUVs, including the Silverado, Tahoe, Suburban, Yukon, and Escalade. Please check the detailed fitment list to confirm it matches your specific vehicle.