Restore Your Truck’s Electrical System and Get Back to Work
Are you battling a frustrating series of electrical gremlins in your GMC Sierra? Flickering lights, unresponsive power windows, a dead HVAC system, or random warning lights can bring your work to a halt. These aren’t just minor annoyances; they are symptoms of a failing Body Control Module (BCM), the central computer for your truck’s essential comfort and safety features. This pre-programmed GM 25844480 BCM is the definitive, hassle-free solution to restore full functionality and dependability to your vehicle.
Common Symptoms & Your Solution
A faulty BCM can cause a cascade of confusing problems. If you’re experiencing any of the following, this module is the fix you need:
- Complete or intermittent loss of HVAC controls or blower motor function.
- Unresponsive power windows, door locks, or interior/exterior lights.
- An airbag warning light that won’t turn off, often with DTC B1001.
- Erratic security system behavior, causing no-start conditions or stalling.
- A variety of diagnostic trouble codes (DTCs) related to body electronics.
Instead of spending a fortune on diagnostic fees and dealership programming, this VIN-programmed 2013 GMC Sierra 2500 Body Control Module arrives ready for a straightforward, plug-and-play installation.
Features & Benefits
- ✔ Ready to Install, No Dealer Needed: We pre-program this module to your truck’s exact VIN. This ensures perfect communication with your vehicle’s other systems right out of the box, saving you hundreds in dealership programming fees.
- ✔ Restores Full Functionality: Get your power windows, door locks, lights, wipers, and climate control working reliably again. This module restores the core functions you depend on every day.
- ✔ Eliminates Pesky Warning Lights: Specifically programmed to resolve common communication-related DTCs, including the stubborn airbag code B1001 (may require a post-install sync procedure).
- ✔ Guaranteed Compatibility: This is a direct replacement for a wide range of GM trucks and SUVs from 2007-2013. It is fully interchangeable with part numbers 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, and 22860591.
- ✔ Built for Reliability: Constructed to meet strict OEM standards for performance and durability, ensuring it can handle the demands of a hard-working truck. This unit is backed by our one-year replacement warranty.
- ✔ No Core Charge: Keep your old part. We don’t require you to send the original module back, making the process simpler and faster.
A Mechanic’s Pro Tip: Check Your Grounds
From over 20 years of hands-on diagnostics, I can tell you that a bad ground is the silent killer of electronics in these GM trucks. Before you even install your new 2013 GMC Sierra 2500 Body Control Module, take 10 extra minutes to inspect and clean the main ground connections, especially the one on the frame under the driver’s door. A poor ground can cause voltage spikes and communication errors that mimic a bad BCM and can damage a new one over time. Ensuring a clean, tight connection is the best insurance for a long-lasting repair.
Frequently Asked Questions
What does a Body Control Module do on a GMC Sierra?
The BCM acts as the central hub for your truck’s body electronics. It controls non-engine related functions like your lights, power windows and locks, security system, wipers, and climate control. When it fails, these systems can become erratic or stop working altogether.
Is this BCM truly plug-and-play?
Yes. Because we program it using the VIN you provide during checkout, it comes ready to install without any need for additional dealership programming. This saves you significant time and money.
Do I need to send my old BCM back?
No. This product has no core charge. You can keep or dispose of your original module, making the replacement process much more convenient for you.
What if my airbag light stays on after installation?
In some cases, particularly with DTC B1001, the new BCM needs to be electronically introduced to the airbag system’s computer (SDM). This is a simple ‘Setup SDM Primary Key in BCM’ procedure that can be done with a professional-grade scan tool. It’s a quick sync that is much simpler than full programming.
How do I know if my BCM is the problem?
If you are experiencing multiple, unrelated electrical issues simultaneously (e.g., wipers, locks, and radio all acting up), the BCM is a very likely culprit. A diagnostic scan showing multiple communication error codes with various modules also points directly to a failing BCM.
Where is the BCM located on my 2013 Sierra 2500?
The Body Control Module is typically located inside the cabin, up under the driver’s side of the dashboard, often near the steering column. Installation usually takes less than 15 minutes with basic hand tools.