Restore Your Vehicle’s Electrical Stability
Are you chasing electrical gremlins in your GM vehicle? Flickering dashboard lights, power windows with a mind of their own, or a security system that randomly acts up are classic signs of a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen how a faulty BCM can turn a reliable car, truck, or van into a source of daily frustration. It’s the central hub for your vehicle’s comfort and convenience features, and when it fails, chaos ensues.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We take a reliable BCM and pre-program it with the latest GM software, specifically matched to your vehicle’s VIN. This means you skip the expensive trip to the dealership for programming. You get a module that’s ready to install right out of the box, restoring function and peace of mind.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, locks, or mirrors working intermittently or not at all.
- ✔ The security system or keyless entry failing to operate correctly.
- ✔ Inaccurate readings on the instrument cluster gauges.
- ✔ A persistent battery drain that leaves you with a dead battery.
- ✔ Communication error codes, such as U0140, U0155, or other ‘U’ codes indicating a loss of communication.
- ✔ A no-start condition where the starter doesn’t engage, often accompanied by a security light.
Case Study: The Ghost in the Express Van
A local contractor brought in his 2009 Express 3500 work van, complaining of “ghosts.” The dome lights would flicker, the radio would shut off, and sometimes the power locks wouldn’t respond. He’d already replaced the battery and checked the main grounds. After connecting my scan tool, I found multiple loss-of-communication codes pointing to the BCM. These intermittent issues are incredibly common. We installed a VIN-programmed BCM, and within an hour, every function was back to normal. It’s a fix that saves professionals time and money by getting their vehicle back to work fast.
Your Straightforward BCM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery 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. It’s often secured with a few small bolts or clips. Check your service manual for the exact position.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors. These connectors have locking tabs that must be depressed to be removed. Once disconnected, unbolt the old BCM and remove it from the vehicle.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, ensuring they click into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions: lights, windows, locks, wipers, etc.
- ✔ Perform Relearn Procedures: If your airbag light is on or you notice brake system warnings, you may need to perform the ‘Airbag System Sync’ or ‘Brake Pedal Position Relearn’ as detailed in our post-installation notes. This often requires a professional scan tool.
Will This Fit My Vehicle?
This BCM is a direct replacement for a wide range of GM cars, trucks, SUVs, and vans. Please verify your vehicle is on this list and that your original part number is listed below. This module replaces part numbers: 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, and 95151084.