Is Your GM Vehicle Acting Possessed?
Are you dealing with a frustrating mystery of flickering dashboard lights, power windows with a mind of their own, or a security system that randomly prevents your car from starting? This isn’t a ghost in the machine; these are classic, textbook symptoms of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, when the BCM falters, it creates a cascade of baffling electrical problems that can make your car feel unreliable and unsafe.
From my 20+ years of experience under the hood, I can tell you that a faulty BCM is one of the most common sources of hard-to-diagnose electrical issues. Just last week, a 2011 Chevy Express 2500 work van was brought into my shop. The owner was at his wit’s end—the interior lights would stay on, draining the battery overnight, and the power locks only worked when they felt like it. After ruling out wiring shorts, we traced the problem directly to a failed BCM. Replacing it with a properly programmed unit had his van back in service the same day.
Why a VIN-Programmed GM BCM is Your Best Solution
Forget the hassle and high cost of a dealership visit. This Body Control Module is the definitive solution for your vehicle. We take a high-quality, tested BCM and flash it with the very latest official GM software, using your vehicle’s specific VIN. This ensures that the module is a perfect electronic match for your car’s unique configuration and options, restoring function and communication just as the factory intended.
Common Symptoms of a Failing BCM:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior dome lights or dashboard lights staying on or not turning on at all.
- ✔ The security or anti-theft system preventing the engine from starting.
- ✔ Horn honking randomly or not working when pressed.
- ✔ Unexplained battery drain that leaves you stranded.
- ✔ False warning lights appearing on the instrument cluster.
Simple Installation & Required Procedures
Replacing the BCM is a straightforward job for a seasoned DIYer or any professional technician. Our goal is to get you back on the road quickly and confidently.
- Safety First: Always disconnect the negative battery terminal and wait a few minutes before starting any electrical work.
- Locate the BCM: On most of these GM models, the BCM is located under the driver’s side or center of the dashboard. Check your specific model’s service manual for the exact location.
- Swap the Module: Carefully disconnect the wiring harnesses from the old BCM and remove it. Install the new, pre-programmed module in its place and securely reconnect all harnesses.
- Reconnect Battery: Re-attach the negative battery terminal.
- CRITICAL – Post-Installation Steps: After installation, two procedures are often necessary using a bi-directional scan tool to ensure full system functionality:
- Airbag System Reset: To clear the airbag warning light, you must perform the ‘Setup SDM Primary Key in BCM’ procedure. This re-establishes communication between the new BCM and the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake System Check: Some vehicles require a ‘Brake Pedal Position Sensor Calibration’ to ensure the brake lights and stability control systems function correctly.
Expert Pro Tip: Check for Water Leaks Before You Install
In my shop, I’ve diagnosed hundreds of BCM failures, and a leading cause, especially on SUVs like the Acadia, Traverse, and Enclave, is water intrusion. Before installing your new part, take 10 minutes to check for dampness in the driver’s footwell or around the fuse block. Clogged sunroof drains or a deteriorating windshield seal can allow water to drip directly onto the BCM, causing corrosion and failure. Clearing these drains can prevent you from having the same problem again down the road.
Guaranteed Compatibility
This module is a direct replacement for a wide range of GM vehicles and is compatible with the following part numbers. Please match your original part number to this list to ensure proper fitment:
10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084
After you complete your purchase, simply reply to your order confirmation email with your vehicle’s 17-digit VIN, and we’ll handle the programming before shipping it out.