Solve Your Truck’s Electrical Gremlins for Good
If you’re dealing with bizarre electrical issues in your 2013 GMC Sierra 2500 or another compatible GM truck, a failing Body Control Module (BCM) is often the culprit. As the central nervous system for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating problems, from flickering lights and unresponsive power windows to a persistent airbag warning light. This module, part number 25790508, is the definitive solution, offered with our expert Cloning Service to ensure a seamless, plug-and-play repair without a costly trip to the dealership.
We transfer the precise data from your original module to this replacement unit. This means it arrives ready for installation, retaining all your vehicle’s specific settings and security information. It’s the most reliable way to restore function and clear stubborn diagnostic trouble codes (DTCs) related to body systems.
Case Study: A Tricky Diagnosis
A customer brought in his 2013 Sierra 2500 with a perplexing issue: the HVAC blower would work intermittently, the radio would sometimes not power on, and the airbag light was on with a B1001 code. He’d already replaced the blower motor resistor with no luck. In my shop, I’ve seen this exact combination dozens of times. We hooked up the scanner and confirmed communication faults with the BCM. Instead of a complex wiring chase, we recommended a replacement 2013 Sierra 2500 Body Control Module with our cloning service. After a 5-minute swap under the dash, every single issue was resolved. The cloning preserved the security handshake with the airbag module, clearing the B1001 code after the SDM key sync procedure.
Is Your GM Truck Showing These Electrical Faults?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is your likely solution:
- ✔ Power windows, door locks, or interior lights operating erratically or not at all.
- ✔ HVAC system failures, such as the blower motor not working or being stuck on one speed.
- ✔ An active airbag warning light, often accompanied by DTC B1001.
- ✔ Vehicle security system malfunctions, including random alarm activation or no-start conditions.
- ✔ Unexplained battery drain or other persistent electrical issues.
- ✔ Communication-related trouble codes (U-codes) stored in various modules.
A Straightforward Guide to BCM Replacement
Replacing the BCM is a job most DIYers can handle in minutes. Here’s a simple guide to get your truck back to 100%:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: The BCM is typically found under the driver’s side dashboard, near the steering column.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unclip or unbolt the old module from its mounting bracket.
- Install the New Module: Seat the new, cloned BCM into the mounting bracket and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all body functions—lights, windows, locks, wipers, and HVAC—to confirm the repair.
- Post-Installation Steps: In some cases, an ‘Airbag System Sync’ or ‘Brake Pedal Position Relearn’ may be needed if related warning lights appear. This requires a professional scan tool. See our FAQ for more details.
Why Our 2013 Sierra 2500 Body Control Module is the Right Choice
This isn’t just a part; it’s a comprehensive repair solution. By choosing our cloning service, you bypass the expensive and time-consuming process of dealership programming. We handle the technical side, delivering a module that is pre-configured for your exact vehicle using the data from your original part. It’s built to meet or exceed OEM specifications for durability and performance, backed by our solid warranty. This module is interchangeable with a wide range of part numbers, including 25835966, 15943678, and 20939137, making it a versatile fix for many GM trucks and SUVs.
Verified Fitment for Your GM Truck or SUV
This Body Control Module is confirmed to fit the following vehicles. Please match your part number or contact us with your VIN to ensure compatibility.
ESCALADE & ESV & EXT 07-11
SIERRA 1500 PICKUP 07-11
SIERRA 2500 PICKUP 07-13
SIERRA 3500 PICKUP 07-13
SIERRA DENALI 07-13
SILVERADO 1500 PICKUP 07-11
SILVERADO 2500 PICKUP 07-13
SILVERADO 3500 PICKUP 07-13
SUBURBAN 1500 07-11
SUBURBAN 2500 07-11
TAHOE 07-11
YUKON & YUKON XL 07-11
Note: For 2007 models, this fits the ‘new style’ with a smooth door skin. Some 2010-2013 models may require matching ID 25835966.
Frequently Asked Questions
What is the “Cloning Service” and why do I need it?
Our Cloning Service involves transferring the critical vehicle-specific data (like VIN, security info, and options) from your old BCM to the new one. This makes the replacement module truly plug-and-play, eliminating the need for expensive dealership programming.
Do I need to send my original BCM to you?
Yes. For the cloning service to work, you must send us your original module after placing your order. We perform the service and ship both your original and the newly programmed replacement back to you.
Is there a core charge or do I get my old part back?
There is no core charge. We always return your original module along with the programmed replacement unit. You get to keep your original part.
My airbag light is on. Will this fix it?
This module will often resolve the root cause of an airbag light triggered by a BCM fault (like DTC B1001). However, after installation, you may need a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the systems and turn off the light.
What if I still have issues after installation?
While our cloned 2013 Sierra 2500 Body Control Module resolves most issues, underlying problems like poor ground connections or wiring faults can cause similar symptoms. Always check the main BCM ground during installation. If problems persist, consult a factory service manual or a qualified technician for further diagnosis.