Restore Your Vehicle’s Electrical System with a Plug-and-Play Solution
Are you dealing with baffling electrical problems in your GM vehicle? Flickering lights, malfunctioning power windows, a security system that acts up, or a dashboard that seems to have a mind of its own are all classic signs of a failing Body Control Module (BCM). As the central command center for your car’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated issues. I’ve seen it hundreds of times in my shop: a simple BCM failure making a perfectly good vehicle feel unreliable and unsafe.
This isn’t just a replacement part; it’s a direct solution. We take the guesswork and hassle out of the repair by pre-programming this GM Body Control Module with the latest GM software, precisely matched to your vehicle’s unique VIN. This means you can 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.
A Technician’s Notebook: The Parasitic Draw Mystery
A 2009 Chevy Equinox came into my bay with a classic complaint: a dead battery every morning. The owner had already replaced the battery and alternator, but the problem persisted. A parasitic draw test showed a significant power drain, but pulling fuses was inconclusive. Experience pointed me toward the BCM. These modules can fail internally, creating a short that keeps certain circuits awake even when the car is off. After swapping in a pre-programmed GM Body Control Module, the draw vanished. The customer went from daily jump-starts to reliable starts, all thanks to replacing the vehicle’s failing electronic nerve center.
Common Symptoms of a Failing BCM
If your vehicle is showing these signs, a faulty BCM is the likely culprit. Don’t let these issues go unchecked, as they can worsen over time.
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security system or keyless entry failing to operate correctly (e.g., false alarms, won’t recognize key fob).
- ✔ Dashboard warning lights appearing for no reason, including the airbag light.
- ✔ Communication error codes stored in the system, such as U0140, U0155, or other “U” codes indicating a loss of communication.
- ✔ Unexplained battery drain that kills the battery overnight.
A Straightforward Guide to Installation
Replacing your GM Body Control Module is a manageable job for a DIYer with basic tools. While locations vary, the BCM is typically found under the driver’s or passenger’s side of the dashboard.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
- Locate the Old BCM: Find the module. It’s often secured with a few small bolts or clips and may be behind a kick panel or the glove box.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be pressed to release. Once disconnected, unbolt the old module and remove it.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical harnesses. You should hear a ‘click’ as they lock in place.
- Power Up: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions like lights, windows, and locks to ensure proper operation.
- Perform Relearns (If Needed): As noted in our post-installation details, some vehicles may require a Brake Pedal Position Relearn or an Airbag System Sync if warning lights appear.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of GM cars, trucks, and SUVs, covering numerous part numbers to ensure you get the right component. Please verify your vehicle is on the list below. This part replaces: 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.
Frequently Asked Questions
How does the VIN programming work?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians use this number to load the exact, factory-correct software and calibrations for your specific vehicle onto the BCM before we ship it to you.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module, which saves you the time and expense of shipping a core back.
What is a Brake Pedal Position Relearn?
This is a simple calibration procedure that ensures the new BCM accurately reads the position of your brake pedal. It’s essential for proper brake light and traction control operation and may be required on certain models after installation.
Why is my airbag light on after installation?
If the airbag light is on, the BCM needs to be electronically ‘shaken hands’ with the airbag’s computer (SDM). This procedure, called ‘Setup SDM Primary Key in BCM,’ requires a professional scan tool to complete and will turn off the light.
Is this part difficult to install myself?
The physical installation is straightforward for most DIYers, involving basic tools to remove panels and unbolt the module. The main challenge with BCM replacement is typically the programming, which we handle for you, making the process much simpler.