Restore Your Vehicle’s Electrical System with a Plug-and-Play Solution
Are you chasing down electrical gremlins in your GM vehicle? Flickering lights, malfunctioning power windows, a security system that acts up, or even a car that refuses to start can all point to one central culprit: a failing Body Control Module (BCM). As the nerve center for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating, seemingly unrelated issues. After more than 20 years of diagnosing these exact problems, I can tell you that swapping out a BCM used to mean an expensive trip to the dealership for programming. Not anymore.
This is a direct-fit replacement Programmed GM Body Control Module, delivered to your door already flashed with the latest GM software for your specific vehicle. Simply provide your VIN during checkout, and we handle the complex programming. This saves you time, money, and the headache of scheduling a dealer appointment. You get a reliable part that restores full functionality, ready for installation right out of the box.
A Technician’s Notebook: The Case of the Haunted SUV
I once had a 2008 Acadia in the bay that was driving its owner crazy. The radio would turn on by itself, the door locks would cycle randomly while driving, and the dome light would stay on, draining the battery overnight. The owner had already replaced the battery and checked all the fuses. A scan showed a handful of communication error codes (U-codes) pointing to the BCM. Instead of a complex wiring issue, the BCM’s internal logic had simply failed. We installed a VIN-programmed module just like this one, and within an hour, every single ghost in the machine was gone. This single component was the key to restoring order.
Is Your Vehicle Showing These Symptoms?
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that won’t turn on or off correctly.
- ✔ The security system or keyless entry is malfunctioning or preventing the car from starting.
- ✔ Dashboard warning lights (like the airbag or security light) are illuminated for no reason.
- ✔ Communication error codes, such as U0140, U0155, or other U-series codes, are present.
- ✔ Horn, wipers, or other accessories working intermittently or not at all.
Your Straightforward BCM Installation Guide
Installing your Programmed GM Body Control Module is a manageable job for a confident DIYer. While the BCM’s location varies by model (check your service manual for specifics), the general process is consistent.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Locate the BCM: Depending on your vehicle, the BCM is typically found under the driver’s side or passenger’s side of the dashboard, or behind the center console. The fitment list below provides common locations.
- Disconnect and Remove: Carefully unplug all the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Reconnect all the electrical connectors, making sure each one clicks securely into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Final Checks: Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, wipers, etc. Start the vehicle to ensure it runs properly.
Important Post-Installation Notes
In some cases, additional steps with a high-end scan tool may be required to sync other vehicle systems with the new BCM. This is normal and depends on your vehicle’s specific configuration.
- Airbag System Sync: If your airbag warning light is on after installation, a procedure called “Setup SDM Primary Key in BCM” is needed to re-establish communication between the modules.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure proper function of the brake lights and traction control system.
- No Core Charge: You are not required to return your old BCM. There is no core charge or fee.
Guaranteed Fitment for Your Vehicle
This module is a direct replacement for a wide array of GM vehicles and part numbers. Please verify your model and original part number from the list below. This part replaces the following 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, 95151084.
Frequently Asked Questions
Frequently Asked Questions
Do I really need to provide my VIN?
Yes, absolutely. Providing your 17-digit Vehicle Identification Number (VIN) is essential. We use it to load the correct GM-certified software and settings for your vehicle’s specific options, ensuring the Programmed GM Body Control Module works correctly right out of the box.
Is this a difficult part to replace myself?
For most DIYers with basic tools and some experience, this is a very manageable repair. The biggest challenge is often just accessing the BCM’s location under the dash. Our installation guide provides the general steps to help you through it.
What happens if my airbag light comes on after installation?
This is a known possibility. It simply means the new BCM needs to be electronically ‘introduced’ to the airbag’s Supplemental Deployment Module (SDM). A repair shop with a professional scan tool can perform the ‘Setup SDM Primary Key’ procedure in a few minutes to resolve this.
Will this fix my specific electrical problem?
The BCM controls dozens of functions, and if you’re experiencing multiple, strange electrical issues, there’s a very high probability that a faulty BCM is the root cause. It’s one of the most common failure points for the symptoms listed above.
Do I have to send my old part back?
No. We do not require you to return your original module. There is no core charge associated with this purchase, saving you the hassle and cost of return shipping.