Restore Flawless Control to Your GM Truck or SUV
Are you battling frustrating electrical issues in your Sierra, Silverado, or Tahoe? Intermittent power windows, a malfunctioning climate control system, or random warning lights can undermine the reliability of your vehicle. This genuine GM Body Control Module, pre-programmed to your vehicle’s specific VIN, is the definitive solution to restore full functionality and peace of mind. It acts as the central hub for your vehicle’s body electronics, ensuring all components communicate and operate exactly as the factory intended.
Common Symptoms & Your Solution
A failing BCM can cause a cascade of confusing problems. If you’re experiencing any of the following, this module is the solution you need. It is engineered to resolve these exact issues, including persistent Diagnostic Trouble Codes (DTCs) that other fixes can’t solve. This module is a direct replacement for your original 2013 Sierra 2500 BCM 25844479 and many other part numbers.
- Power windows, door locks, or mirrors operating erratically or not at all
- HVAC and climate control blower motor failures
- Interior or exterior lights not working correctly
- Airbag warning light illumination, often with DTC B1001
- Malfunctions with the vehicle’s security or anti-theft system
- Unexplained battery drain or other persistent electrical gremlins
Features & Benefits
- ✔ Plug-and-Play Installation: This module arrives pre-programmed to your vehicle’s VIN. Simply install it, and you’re done. No expensive trips to the dealership for programming are required.
- ✔ Restores Full Functionality: Regain complete and reliable control over your vehicle’s essential body systems, from the power locks to the windshield wipers, for a seamless driving experience.
- ✔ OEM Quality & Reliability: Built to strict General Motors standards, this BCM ensures dependable, long-term performance, restoring the integrity you expect from your truck or SUV.
- ✔ Solves Annoying Electrical Problems: Put an end to troubleshooting mysterious electrical issues. This is the core component that will fix grounding problems, misfires, and other BCM-related DTCs.
- ✔ Perfect Fitment Guaranteed: As a direct replacement for part numbers 25844479, 25835966, 20939137, 22860591, and more, it ensures perfect compatibility with your vehicle.
- ✔ Warranty Protection: This unit is backed by our one-year replacement warranty.
From the Technician’s Bench: A Pro Tip
Over my 20 years in diagnostics, I’ve seen countless cases where a faulty ground connection mimics a bad BCM. Before replacing your module, always perform a voltage drop test on the main BCM ground wires. A poor ground can starve the module of power, causing unpredictable behavior. Ensuring your grounds are clean and tight when you install your new BCM is the single best thing you can do to guarantee a successful, long-lasting repair. This step separates a quick fix from a professional-grade installation.
By choosing this pre-programmed module, you are not just buying a part; you are investing in a reliable, hassle-free solution. This is the correct fix for your 2013 Sierra 2500 BCM 25844479, allowing you to get your vehicle back on the road with confidence and all systems operating perfectly. Don’t let electrical issues compromise your vehicle’s performance any longer.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We program the module to your vehicle’s VIN before it ships. This allows for a simple, plug-and-play installation without the need for any additional programming or dealership visits.
What tools are needed for installation?
Installation is straightforward and typically requires basic hand tools like a socket set and a trim removal tool. The BCM is usually located under the driver’s side dashboard near the steering column. Most owners can complete the swap in under 15 minutes.
My airbag light is on. Will this fix it?
This BCM will often resolve issues causing an airbag light, especially with code B1001. However, after installation, some vehicles may require a ‘Setup SDM Primary Key in BCM’ procedure using a professional scan tool to sync the new BCM with the airbag system and clear the light.
Is there a core charge for my old BCM?
No, there is no core charge. You can keep your old part, so there’s no need to worry about the cost or hassle of sending it back.
How do I provide my VIN for programming?
You will be prompted to enter your vehicle’s 17-digit VIN during the checkout process. We cannot ship the module until we have this information, as the programming is essential for it to work correctly in your vehicle.
Will this fit my vehicle if my original part number is different?
Yes. This BCM, part number 25844480, is the updated OEM replacement for a wide range of earlier part numbers, including the 2013 Sierra 2500 BCM 25844479. Please check the compatibility list on this page to confirm it is the correct part for your specific model.