Restore Full Functionality to Your GM Truck with a Cloned BCM
Are you chasing down bizarre electrical problems in your 2007-2011 Silverado 2500? Issues like the radio turning on and off by itself, power windows that won’t respond, or a persistent airbag light can almost always be traced back to a failing Body Control Module (BCM). The BCM is the central hub for your truck’s body electronics, and when it fails, it can make your vehicle feel unreliable and frustrating to drive. This replacement module, part number 15943678, is the definitive solution, offered with our expert cloning service to make your repair as simple as possible.
A Technician’s Notebook: The Case of the Haunted Silverado
I remember a 2009 Silverado 2500 that came into my shop a few years back. The owner was at his wit’s end. He said his truck was “haunted”—the horn would honk randomly, the dash lights would flicker, and his HVAC controls had a mind of their own. He’d already replaced the battery and checked the main grounds. After hooking up my scan tool, I saw a storm of communication error codes pointing to the BCM. Instead of just installing a new module and sending him to the dealer for expensive programming, we performed a cloning service. We transferred all the data from his old, faulty BCM to our replacement unit. He was back on the road in under an hour, with all the gremlins gone for good. This is the power of a properly cloned module—it’s a true plug-and-play fix.
Is Your Silverado Showing These Electrical Gremlins?
A failing BCM doesn’t always cause a complete shutdown. Often, it presents as a set of annoying and intermittent symptoms. If you’re experiencing any of the following, your BCM is the likely culprit:
- ✔ The airbag warning light is illuminated, often with a DTC B1001 (SDM Mismatch) stored.
- ✔ Power windows, door locks, or interior lights work sporadically or not at all.
- ✔ Your HVAC system is unresponsive, or the blower motor seems to have a mind of its own.
- ✔ The security system acts up, causing no-start conditions or random alarm triggers.
- ✔ Wipers or headlights activate without input.
- ✔ Communication codes (U-codes) are present, indicating a network problem.
Your Straightforward BCM Installation Guide
One of the best parts of this repair is its simplicity. Our cloning service handles all the complex software work, leaving you with a simple parts swap that takes just a few minutes. No dealer visit required.
- Safety First: Always begin by disconnecting the negative terminal on your truck’s battery to prevent any electrical shorts.
- Locate the BCM: On most 2007-2011 Silverado models, the Body Control Module is located under the driver’s side dashboard, to the left of the steering column. You may need to remove a lower dash panel for access.
- Swap the Module: The BCM is held in place by retaining clips and has several large electrical connectors. Carefully release the locking tabs on each connector and pull them straight out. Unclip the old module and clip the new one in its place.
- Reconnect Everything: Firmly plug all the electrical connectors into your new, cloned BCM. You’ll hear a click as they lock into place. Reinstall any trim panels you removed.
- Power Up: Reconnect the negative battery terminal. Start your vehicle and test all functions—windows, locks, lights, wipers, and HVAC—to confirm the repair was successful.
Important Note: While our cloning service eliminates most post-install procedures, if your airbag light remains on, you may need a scan tool with GM-specific functions to perform the ‘Setup SDM Primary Key in BCM’ procedure. This resynchronizes the airbag system with the new BCM.
Verified Fitment For Your Truck & More
This Body Control Module is a direct replacement for part number 15943678 and other interchangeable numbers. It is guaranteed to fit the following vehicles:
ESCALADE & ESV & EXT 07-11
SIERRA 1500 PICKUP 07-11
SIERRA 2500 PICKUP 07-11
SIERRA 3500 PICKUP 07-11
SIERRA DENALI 07-11
SILVERADO 1500 PICKUP 07-11
SILVERADO 2500 PICKUP 07-11
SILVERADO 3500 PICKUP 07-11
SUBURBAN 1500/2500 07-11
TAHOE 07-11
YUKON & YUKON XL 07-11
Frequently Asked Questions
What exactly is a BCM cloning service?
Our cloning service is a process where we transfer the complete software profile—including your vehicle’s VIN, mileage, security information, and specific options—from your original BCM to this replacement unit. This makes the new module an identical twin to your old one, ensuring 100% compatibility and eliminating the need for dealership programming.
Will I need to go to the dealership after installation?
No. Because the replacement module is a perfect clone of your original, the vehicle will not know the part has been changed. This avoids any need for expensive and time-consuming programming or initialization at a dealership.
My airbag light is on after installing the new BCM. What do I do?
This can happen occasionally. It means the new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (the SDM). This is done with a bi-directional scan tool using the ‘Setup SDM Primary Key in BCM’ function. Most professional repair shops can perform this procedure quickly.
What happens to my original module?
We always return your original module to you along with the newly cloned replacement. There is no core charge, and you can keep your original part.
How do I know if the BCM is really my problem?
The most common indicators are multiple, unrelated electrical failures occurring at the same time. If your power locks, windows, and radio are all malfunctioning intermittently, the BCM is the most likely cause, as it controls all of these systems.