Tired of Chasing Electrical Gremlins in Your Sierra 3500?
If your 2007-2011 GMC Sierra 3500 is suffering from bizarre electrical issues like flickering lights, a dead instrument cluster, or power windows with a mind of their own, you’re not alone. The Body Control Module (BCM) is the electronic brain for all your truck’s comfort and convenience features. When it fails, it can cause a cascade of frustrating problems that are often difficult to diagnose. This replacement BCM, part number 15901388, is the definitive solution to restore full functionality and reliability to your workhorse.
Case Study: A Tricky Diagnosis
I recently had a 2010 Sierra 2500 in my bay with a classic BCM failure story. The owner had already replaced the battery and checked all the main grounds, but the truck would randomly refuse to start, and the radio and HVAC controls would cut out intermittently. A scan showed a handful of communication codes (U-codes) and a specific B1001 for the airbag system. These mixed signals often point directly to a failing BCM. Instead of spending hours on further diagnostics, we confirmed the BCM was the culprit. By providing a cloned module, we had the truck fixed and back to the customer the same day, saving them from a costly and time-consuming trip to the dealership.
What is Our Cloning Service?
Forget about expensive dealership programming and towing fees. Our expert cloning service makes this repair a breeze. You simply send us your original BCM, and we professionally transfer all the critical vehicle-specific data—including VIN, mileage, and key information—to this replacement unit. The module you receive back will be 100% plug-and-play, perfectly synced to your truck’s existing systems. We then ship your original module back with your newly programmed replacement, as we have no core charge or policy. It’s the most seamless and cost-effective way to perform this repair.
Is Your Sierra Exhibiting These Electrical Gremlins?
- ✔ The security light is on, and the engine won’t start or stalls unexpectedly.
- ✔ Power windows, door locks, or interior lights work intermittently or not at all.
- ✔ The HVAC system is unresponsive, or the blower motor is stuck on or off.
- ✔ An airbag warning light is illuminated, often with a Diagnostic Trouble Code (DTC) like B1001.
- ✔ You’re experiencing strange electrical behavior that seems to have no logical cause.
- ✔ The vehicle’s horn or wipers activate on their own.
Your Straightforward BCM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your truck’s battery before beginning any electrical work.
- ✔ Locate the BCM: On most 2007-2011 Sierra models, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black plastic box with several large electrical connectors.
- ✔ Remove the Old Module: Carefully unplug all wiring harnesses. They have locking tabs that need to be depressed. Once unplugged, unbolt or unclip 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 and Test: Reconnect the negative battery terminal. Start the truck and test all body functions—lights, locks, windows, wipers, and HVAC—to confirm the repair was successful.
Post-Installation Note: In some cases, a persistent airbag light may require a professional scan tool to perform the “Setup SDM Primary Key in BCM” function. Similarly, a “Brake Pedal Position Relearn” might be necessary. These are simple procedures for any qualified technician. Always refer to a service manual for your specific vehicle if you are unsure.
Verified Fitment for Your GM Truck or SUV
This Body Control Module is a direct replacement for part number 15901388 and is interchangeable with a wide range of other GM part numbers, including: 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 20939137, 20939138, and 22860591. It fits a broad selection of 2007-2013 GM vehicles, including the specific 2007-2011 Sierra 3500 BCM application as well as many Chevrolet Silverado, Tahoe, Suburban, Avalanche, Cadillac Escalade, and GMC Yukon models.
Frequently Asked Questions
What exactly is a BCM cloning service?
Our cloning service is a process where we transfer the unique software and security data from your original, failing BCM directly onto the replacement unit. This makes the new module an exact digital copy, allowing it to work in your truck immediately without any additional programming.
Will I need to go to the dealership after installing this part?
No. Because the module arrives perfectly cloned to your vehicle’s specifications, you can skip the expensive trip to the dealer for programming. It’s designed to be a true plug-and-play solution.
My airbag light came on after I installed the new BCM. What should I do?
This is a known security handshake procedure. The BCM needs to be synced with the airbag system’s Sensing and Diagnostic Module (SDM). A professional scan tool is required to perform the “Setup SDM Primary Key in BCM” function, which typically resolves the issue instantly.
Where is the BCM located on my 2008 Sierra 3500?
The BCM is typically found under the driver-side dashboard, to the left of the steering column. It is a black module with multiple large wiring connectors plugged into it.
Do I need to return my old BCM? Is there a core charge?
There is no core charge. We require your original module to perform the cloning service, after which we return your original part to you along with the newly programmed replacement. You get to keep both.