Solve Your Truck’s Electrical Gremlins for Good
If you’re dealing with a frustrating array of electrical issues in your GM truck or SUV, a failing Body Control Module (BCM) is often the culprit. As the central command for your vehicle’s body electronics, its failure can cause chaos. This BCM, compatible with part number 25790508, is the definitive solution. Through our expert Cloning Service, we transfer the exact data from your original module to this replacement unit. This ensures a seamless, plug-and-play installation without requiring expensive dealership programming, getting your truck back to perfect working order.
From the Diagnostic Bay: The Case of the Haunted Silverado
I remember a 2013 Silverado 3500 HD that came into my shop with the strangest list of symptoms. The radio would turn on and off, the driver’s side window wouldn’t roll down, and the airbag light was on with a DTC B1001. The owner had already replaced the battery and checked all the fuses. After confirming the grounds were solid, we pinpointed the BCM. Instead of a new module and a trip to the dealer for programming, we used a cloned unit. We transferred his original data, he plugged it in, and every single issue was resolved instantly. This is the power of a proper cloning service—it eliminates guesswork and restores function precisely as the factory intended.
Is Your Truck Showing These Telltale Signs?
A faulty BCM can manifest in numerous ways. Over my 20+ years, I’ve seen these modules cause some of the most confusing diagnostic headaches. Here are the most common indicators that your 2013 Silverado 3500 BCM may be failing:
- ✔ Unresponsive or erratic power windows, door locks, or interior lights.
- ✔ HVAC system failures, such as the blower motor not working or controls being inoperative.
- ✔ The security system light flashing, preventing the vehicle from starting.
- ✔ An active airbag warning light on the dash, often with a persistent DTC B1001.
- ✔ Strange electrical behavior like wipers activating on their own or instrument cluster glitches.
- ✔ Communication-related trouble codes (U-codes) stored in the system.
A Straightforward Guide to BCM Replacement
Replacing the BCM is a job most DIYers can handle in their own garage. The module is typically located under the driver’s side dashboard, near the steering column. Follow these steps for a smooth installation:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On most GM trucks and SUVs, it’s a black box with several large connectors, secured by clips or small bolts under the dash. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug all electrical connectors. They have locking tabs, so be gentle. Once disconnected, unclip or unbolt the old BCM and remove it from the vehicle.
- Install the New Module: Seat your new, cloned BCM into the mounting bracket and securely plug in all the connectors. You should hear a click as they lock into place.
- Post-Installation Checks: Reconnect the battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and HVAC. In most cases, everything will work perfectly. If your airbag light remains on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ function. Some models may also require a ‘Brake Pedal Position Relearn’.
Verified Vehicle Compatibility
This BCM is a direct replacement for a wide range of 2007-2013 General Motors trucks and SUVs. It is interchangeable with numerous part numbers, including 25844480, 25835966, 20939137, and your specific part 25790508. Please verify your vehicle is on the list below for guaranteed fitment.
ESCALADE & ESV & EXT 07-11
SIERRA 1500 PICKUP 07-11 (07 new style)
SIERRA 2500/3500 PICKUP 07-13 (07 new style)
SIERRA DENALI 07-13 (07 new style)
SILVERADO 1500 PICKUP 07-11 (07 new style)
SILVERADO 2500/3500 PICKUP 07-13 (07 new style)
SUBURBAN 1500/2500 07-11
TAHOE 07-11
YUKON & YUKON XL 07-11
Frequently Asked Questions
How does the Cloning Service work?
You send us your original Body Control Module. We use specialized equipment to read the unique, vehicle-specific data and transfer it directly onto your replacement module. This makes the new part an exact electronic match to your old one, ensuring all your vehicle’s options and security systems work correctly without any further programming. We then ship both your original module and the ready-to-install replacement back to you.
Do I need to take my truck to the dealership after installation?
No. The primary benefit of our cloning service is that it completely eliminates the need for a trip to the dealer for programming. The module arrives ready for plug-and-play installation.
What if the airbag light is still on after I install the new BCM?
This can happen. It means the new BCM needs to be electronically ‘introduced’ to the airbag’s Sensing and Diagnostic Module (SDM). A professional scan tool is required to perform a procedure called ‘Setup SDM Primary Key in BCM’. This syncs the two modules and will turn off the light.
Is there a core charge for this part?
No, there is no core charge. Our process requires your original module for the cloning service, and we always return your original part to you along with the newly programmed replacement.
Could a bad ground cause the same symptoms as a bad 2013 Silverado 3500 BCM?
Absolutely. In my experience, poor ground connections, especially the main ones on the frame and near the BCM, can mimic BCM failure. It’s always a good practice to clean and check your grounds before condemning the module. However, if the grounds are good, the BCM is the next logical point of failure.