Are you tired of chasing electrical gremlins in your GMC Sierra? One minute your power windows work, the next they don’t. The radio cuts out, the door locks have a mind of their own, and the HVAC system is completely unresponsive. As a technician with over two decades of diagnostic experience, I’ve seen these exact frustrations countless times. The root cause is often a failing Body Control Module (BCM)—the central nervous system for your truck’s body electronics.
This OEM-quality Body Control Module, interchangeable with part number 15940214, is the definitive solution. We take the guesswork and high dealership costs out of the repair by pre-programming it to your vehicle’s specific VIN. This ensures all your truck’s original features work correctly right out of the box, making it a true plug-and-play fix for any DIYer or professional shop. Restore full, reliable function to your vehicle’s accessories and security systems with a module built to last.
A Technician’s Notebook: The Ground Wire That Fooled Everyone
A 2009 Sierra 1500 came into my bay with a classic case of what looked like a dead BCM. The dash lights were flickering, the HVAC was out, and it had a dozen communication codes. The owner had already replaced the battery and alternator. Before condemning the module, I did my due diligence and checked the main BCM ground—a small black wire bolted to the metal dash frame near the module. Sure enough, the bolt was slightly loose, causing intermittent contact. After tightening it, every single issue disappeared. This is why I always tell my customers: when you replace your 2007-2011 Sierra 1500 BCM, take 30 seconds to clean and tighten that ground connection. It’s the best way to ensure your new part works perfectly and prevents a misdiagnosis.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, and interior/exterior lights.
- ✔ The security system acts up, causing a no-start condition or random alarm activation.
- ✔ Complete loss of heating and air conditioning controls, or a blower motor that won’t turn on.
- ✔ An illuminated airbag light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Strange instrument cluster behavior or multiple communication error codes stored.
DIY-Friendly Installation: A 5-Minute Fix
- ✔ Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work.
- ✔ Locate the Module: The BCM is located under the driver’s side dashboard, typically to the left of the steering column. No major dash removal is required.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors. Most have a locking tab you’ll need to press. Once unplugged, release the clips holding the module in its bracket and remove it.
- ✔ Install the New BCM: Snap the new, pre-programmed module into the bracket and securely reconnect all electrical connectors. You should hear a ‘click’ as they lock into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions—lights, locks, windows, wipers, and HVAC—to confirm the repair was successful.
Will This Fit My Truck or SUV?
This module is a direct-fit replacement for a wide range of General Motors vehicles. While this page focuses on the 2007-2011 Sierra 1500 BCM, it is also verified to fit the following models. Please match your part number or contact us with your VIN to guarantee compatibility.
AVALANCHE 1500 07-11 | ESCALADE & ESV/EXT 07-11 | SIERRA 1500/2500/3500 & DENALI 07-13 | SILVERADO 1500/2500/3500 07-13 | SUBURBAN 1500/2500 07-11 | TAHOE 07-11 | YUKON & YUKON XL 07-11. Note: Some 2007 models require the ‘new style’ (smooth door skin) body type. Some 2010-2013 models may have a specific module ID requirement; this part covers ID 25835966.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
It means we load your truck’s unique Vehicle Identification Number (VIN) and its specific factory options into the module before we ship it. This makes the module ready for installation without needing expensive programming tools or a trip to a dealership, saving you time and money.
Do I need to return my old BCM? Is there a core charge?
No. We believe in making your repair as simple as possible. There is absolutely no core charge, and you are not required to send your old part back to us.
My airbag light is on after installing the new module. What do I do?
This is a common security feature on GM vehicles. If the airbag light persists (often with code B1001), the Supplemental Inflatable Restraint (SIR) system needs to be synced with the new BCM. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. It’s a quick relearn process for a qualified technician.
Is any other relearn procedure required?
In some cases, a Brake Pedal Position (BPP) sensor relearn may be needed to ensure proper brake light and traction control operation. This is also a simple procedure that can be performed with a capable bi-directional scan tool.
What if I have issues after installation?
Our team of experienced technicians is here to help. This module is backed by a one-year warranty, and we provide expert support to help you diagnose any lingering issues. Your satisfaction is our top priority.