Tired of Unpredictable Electrical Problems in Your GM Truck?
If you’re dealing with a 2013 Silverado 2500 that seems to have a mind of its own—flickering lights, a dead instrument cluster, a temperamental HVAC system, or power windows that won’t cooperate—the Body Control Module (BCM) is the most likely culprit. As the central command center for your truck’s body electronics, a failing BCM can cause a cascade of frustrating and seemingly unrelated issues. This replacement Body Control Module, part number 15901388, is the definitive solution to restore order and reliability to your vehicle.
We make this repair easier than ever with our professional Cloning Service. Simply send us your original BCM, and we will transfer all the critical vehicle-specific data to this replacement unit. This process ensures the module arrives at your door fully programmed and ready for a true plug-and-play installation, eliminating the need for expensive dealership visits or specialized programming tools. Get your truck’s essential functions back online with a dependable, hassle-free fix.
A Technician’s Notebook: The Case of the Haunted Silverado
I once had a 2011 Silverado 2500 in my bay that was driving the owner crazy. The radio would turn on and off, the dome light would stay on, and occasionally the truck would refuse to start, citing a security issue. He had already replaced the battery and checked the alternator. After hooking up my scanner, I saw a handful of communication codes pointing to the BCM. A quick check of the main ground point for the BCM under the dash revealed minor corrosion. After cleaning the ground, some issues improved but the core problems remained. We used our 2013 Silverado 2500 Body Control Module cloning service to prepare a new unit. Once it was installed—a five-minute job—every single phantom electrical issue was gone for good. It’s a powerful reminder that this single component is vital for dozens of vehicle functions.
Is Your Truck Showing These Symptoms?
- ✔ Non-functioning or erratic power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that won’t turn on or off correctly.
- ✔ HVAC and climate control systems failing to operate or blowing air intermittently.
- ✔ An active airbag warning light, often accompanied by DTC B1001 (SDM Mismatch).
- ✔ Vehicle security system malfunctions, causing no-start or stalling conditions.
- ✔ Wipers behaving erratically or not working at all.
- ✔ A host of communication or body-related Diagnostic Trouble Codes (DTCs).
Your Straightforward BCM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- ✔ Locate the BCM: On most GM trucks and SUVs of this era, the BCM is located under the driver’s side dashboard, near the steering column. It’s typically a black plastic box with several large electrical connectors.
- ✔ Remove the Old Module: Carefully unplug all wiring harnesses from the original BCM. The connectors have locking tabs that need to be depressed. Once unplugged, unclip or unbolt the module from its mounting bracket.
- ✔ Install the New Module: Seat the new, cloned BCM into the mounting bracket and securely plug in all the wiring harnesses. You should hear a click as they lock into place.
- ✔ Reconnect Power: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions: lights, windows, locks, wipers, and HVAC to confirm the repair.
- ✔ Post-Installation Checks: If the airbag light is on, an ‘Airbag System Sync’ (Setup SDM Primary Key) procedure is needed using a pro-level scan tool. Some models may also require a ‘Brake Pedal Position Relearn’ to ensure proper function.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for part number 15901388 and interchanges with several other part numbers, including 25835966, 25844480, 20939137, and more. It is confirmed to fit the following vehicles:
Note: For 2007 models, this fits the ‘new style’ with a smooth door skin. Always verify your part number for a perfect match.
Frequently Asked Questions
What exactly is the Cloning Service?
Our Cloning Service is a simple process where you send us your original, faulty BCM. We then extract the unique, vehicle-specific programming and security data from it and flash it directly onto your replacement module. This makes the new part a perfect digital copy of the old one, ensuring it works seamlessly with your truck’s other systems without any additional programming.
Do I need to take my truck to the dealer after installing this?
No. Because we clone your original module’s data, this part is ready for installation right out of the box. This process bypasses the need for dealership-level programming, saving you time and money.
Why is my airbag light still on after replacement?
This is a common security feature. If the airbag light persists (often with code B1001), the BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). This procedure, called ‘Setup SDM Primary Key in BCM’, must be performed with a professional diagnostic tool but is a quick function for any qualified mechanic.
Is there a core charge for my old part?
No, there is absolutely no core charge. We require your original module to perform the cloning service, and it will be returned to you along with your newly programmed replacement unit.
Will this fix my intermittent power locks and windows?
Yes, in the vast majority of cases. The BCM directly controls those functions, and erratic operation of power locks, windows, and the HVAC blower motor are classic symptoms of an internal BCM failure.