Tired of Chasing Electrical Gremlins in Your GM Truck?
If you’re dealing with a 2013 GMC Sierra 2500 where the electronics have a mind of their own, you’ve likely met the culprit: a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen firsthand how a bad BCM can turn a reliable truck into a source of constant frustration. It’s the central command for your vehicle’s comfort and convenience features, and when it fails, it can manifest as flickering lights, dead power windows, an unresponsive HVAC system, or even a vehicle that refuses to start due to security system errors. This isn’t just an annoyance; it’s a critical failure that can impact vehicle safety and operation.
This replacement BCM, part number 15901388, is the definitive solution. Forget expensive dealership visits and the hassle of programming. We offer a professional Cloning Service. You simply send us your original module, and we transfer all the essential data—including key information and vehicle-specific settings—to this new unit. We then ship both your original module and the ready-to-install replacement back to you. The result is a true plug-and-play component that restores your truck’s functionality right out of the box.
A Technician’s Notebook: The Misleading Ground
I remember a 2011 Silverado 2500 that came into the shop with a classic case of what looked like BCM failure—the radio would cut out, the dome light would flicker, and the power locks worked intermittently. The customer had already replaced the battery and alternator. Before condemning the BCM, I went straight to the main BCM ground point under the driver’s side dash. Sure enough, the bolt was slightly loose and there was visible corrosion. After cleaning the contact point and tightening the ground, all the issues vanished. It’s a 10-minute check that can save you hundreds. Always verify your grounds before replacing a module; a bad ground can mimic BCM failure perfectly and will cause a new module to fail prematurely.
Is Your Truck Exhibiting These Electrical Gremlins?
A failing BCM doesn’t always throw a check engine light, but it leaves a trail of clues. If your Sierra, Silverado, or other compatible GM vehicle is showing these signs, it’s time to inspect the BCM.
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights staying on, flickering, or refusing to turn on.
- ✔ HVAC system blower motor not working or stuck on one speed.
- ✔ The security system light is flashing, preventing the engine from starting.
- ✔ An airbag warning light is illuminated, often with a diagnostic trouble code like B1001 (Setup SDM Primary Key in BCM).
- ✔ Unexplained battery drain while the vehicle is parked.
Your 5-Minute BCM Swap Guide
This is one of the more straightforward module replacements you can do. With our cloning service, no special programming tools are required for the initial installation.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the BCM: On most GM trucks and SUVs from this era, the BCM is located under the driver’s side of the dashboard, often near the steering column. It’s a black box with several large electrical connectors.
- Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, the module can be unclipped or unbolted from its bracket.
- Install the New Module: Seat your newly cloned BCM into the mounting bracket and securely plug in all the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the ignition on and test all body functions—lights, locks, windows, wipers, and HVAC—to confirm the repair.
- Post-Install Checks: If the airbag light remains on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ function. A brake pedal position relearn may also be required on some models.
Will This Fit My Truck or SUV?
This module is a direct replacement for a wide range of popular General Motors vehicles. It is interchangeable with multiple part numbers, including 25844480, 25835966, 20939137, and 15901388. Please verify your part number or consult the fitment list below.
Fitment includes many 2007-2013 models of the Chevrolet Avalanche, Silverado, Suburban, Tahoe; GMC Sierra, Yukon, Yukon XL; and Cadillac Escalade, ESV, and EXT. This is the correct 2013 Sierra 2500 Body Control Module and will restore your truck to factory-fresh operation.
Frequently Asked Questions
What exactly is the Cloning Service?
Our Cloning Service involves transferring the complete software and vehicle-specific data (like VIN, mileage, and key information) from your original BCM to the replacement unit. This makes the new module a perfect electronic match for your truck, ensuring a seamless, plug-and-play installation without needing a trip to the dealer.
Do I need to send my original BCM to you?
Yes. For the cloning process to work, we need your original module. After you place your order, we will provide instructions for shipping it to our facility. We perform the service and ship both your original module and the ready-to-install replacement back to you.
Is there a core charge for this part?
No, there is no core charge. We always return your original module along with the programmed replacement, so you don’t have to worry about extra fees or core returns.
My airbag light is on. Will this fix it?
This module will often resolve the root cause of an airbag light triggered by BCM failure (like DTC B1001). However, after installation, you may need to perform an ‘Airbag System Sync’ or ‘Setup SDM Primary Key’ procedure with a compatible high-end scan tool to clear the light. This is a security handshake between the new BCM and the airbag system.
Can I install this 2013 Sierra 2500 Body Control Module myself?
Absolutely. The physical installation is very simple and typically takes less than 10 minutes with basic hand tools. Since our cloning service handles all the programming, it’s a DIY-friendly repair that saves you significant time and money.