Restore Full Electrical Function to Your GM Vehicle
Are you battling a frustrating wave of electrical problems in your GM car, truck, or SUV? Flickering interior lights, power windows with a mind of their own, a security system that won’t cooperate, or a vehicle that refuses to start are all classic signs of a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can make driving a daily headache. This isn’t just an inconvenience; it can be a safety issue. We offer a dependable and straightforward solution: a replacement GM Body Control Module, pre-programmed specifically for your vehicle.
Forget about expensive dealership visits and the hassle of finding a shop with the right programming equipment. We take care of the complex part for you. Simply provide your vehicle’s VIN during checkout, and our experts will flash this module with the latest GM software updates tailored to your exact make and model. This ensures seamless integration and restores the precise functionality you’ve been missing. It’s the most efficient way to get your vehicle back to 100%.
A Technician’s Notebook: The Phantom Drain
I once had a 2008 Chevy Impala in the bay with a battery that would die overnight. The owner had replaced the battery twice. We tested the alternator and starter—both were fine. A parasitic draw test showed a significant power drain, but pulling fuses was inconclusive. The culprit? A failing BCM. It was keeping several small circuits partially active even when the car was off, slowly draining the life out of the battery. Swapping in a properly programmed BCM didn’t just fix the weird electrical glitches the owner had learned to live with; it solved the phantom battery drain that was costing him time and money. This is a story I’ve seen play out with dozens of GM vehicles from this era.
Is Your GM Showing These Symptoms?
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior dome lights or dashboard lights flickering, staying on, or not turning on.
- ✔ The anti-theft or security system light is illuminated, preventing the engine from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ False warnings on the driver information center (e.g., “Service Airbag,” “Service Traction System”).
- ✔ Communication error codes stored, such as U0140, U0155, or U0164.
- ✔ Unexplained battery drain when the vehicle is turned off.
Your Straightforward BCM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes before starting work. This prevents electrical shorts and allows onboard systems to power down.
- ✔ Locate the BCM: The location varies by model. Common spots include behind the driver’s side or passenger’s side of the dashboard, under the steering column, or in the center console area. (Refer to the fitment list for your model’s typical location).
- ✔ Disconnect and Remove: Carefully unplug all 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 and remove it from the vehicle.
- ✔ Install the New Module: Mount your new, pre-programmed GM Body Control Module in the same position as the old one. Securely reconnect all electrical connectors, making sure each one clicks firmly into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting the engine) and test your electronics: windows, locks, lights, and horn. Start the vehicle to ensure it runs correctly.
- ✔ Perform Relearns (If Needed): As noted below, some vehicles may require an airbag system sync or brake pedal position relearn if specific warning lights appear. This often requires a professional scan tool.
Important Post-Installation Information
While this module is delivered ready for installation, some GM systems require a handshake with the new BCM. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light is on after installation, a “Setup SDM Primary Key in BCM” procedure is needed. This syncs the BCM with the airbag module and requires a compatible professional diagnostic tool.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be necessary to ensure brake lights and stability control systems function correctly.
- No Core Charge: You are not required to return your old module. Keep it, or dispose of it responsibly.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified technician if you are unsure about any step of the process.
Verified Fitment for Your General Motors Vehicle
This module is a direct replacement for part number 15872388 and a wide range of other interchangeable part numbers. It is compatible with the following vehicles and options. Please verify your model and the location noted.
Frequently Asked Questions
GM Body Control Module
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to access the specific software and calibrations GM designed for your car’s exact options. Programming the with this data ensures it works perfectly right out of the box, just like a part from the dealer.