End the Electrical Chaos in Your GM Vehicle
Are you battling bizarre electrical issues in your car, truck, or SUV? Flickering dash lights, power windows with a mind of their own, a security system that won’t let you start the engine, or random warning messages can all point to one culprit: a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can create frustrating and hard-to-diagnose problems. This isn’t just an inconvenience; it can affect the safety and reliability of your vehicle.
This is a direct-fit replacement GM Body Control Module, delivered to your door fully programmed to your vehicle’s specific VIN. We install the latest, most stable software from GM, ensuring all functions operate exactly as the manufacturer intended. Forget about expensive towing bills and high dealership programming fees. This is the straightforward, reliable solution to restore order to your vehicle’s electronic systems.
A Technician’s Notebook
I remember a 2011 Chevy Impala that came into the shop with a classic case of BCM failure. The customer complained the radio would turn on and off, the interior lights would flicker, and sometimes the car wouldn’t start, showing a security light. We checked the battery and main grounds first—always rule out the simple stuff!—but everything was solid. A scan tool showed multiple ‘U’ codes, indicating communication loss with the BCM. Instead of a costly dealer visit, we installed a VIN-programmed module just like this one. The car fired right up, and all the electrical gremlins were gone. It turned a multi-day diagnostic headache into a simple, one-hour fix.
Common Signs of a Failing GM Body Control Module
- ✔ Intermittent or non-working power windows, door locks, or interior/exterior lights.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ Inaccurate gauge readings or warning lights that stay on (e.g., airbag, ABS).
- ✔ Problems with the keyless entry or remote start system.
- ✔ Diagnostic trouble codes (DTCs) related to lost communication, such as U0140, U0155, or B1001.
A Straightforward Guide to Your BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes to allow all systems to power down completely.
- ✔ Locate the BCM: The module’s location varies. It’s typically found under the driver’s side or passenger’s side of the dashboard, or behind the center console. Your owner’s manual or a quick online search for your specific model will confirm its location.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors. Most have a locking tab that needs to be pressed or lifted. Once disconnected, unbolt or unclip the old BCM from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same position. 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 (without starting the engine) and test all body functions: lights, windows, locks, wipers, and horn.
- ✔ Perform Relearns (If Needed): Start the vehicle. If an airbag light or other warning appears, a post-install procedure like an Airbag System Sync or Brake Pedal Position Relearn may be required using a capable scan tool. See our FAQ for more details.
Verified Vehicle Compatibility List
This module is a direct replacement for a wide range of GM vehicles and supersedes numerous part numbers. Please verify your vehicle is on this list. This unit is compatible with part number 15819552 and interchanges with: 10382479, 15093910, 15276271, 15299986, 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.
Note: Specific options or IDs may apply. Please match your part number or contact us with your VIN to confirm.
Frequently Asked Questions
Why do you need my VIN to program the BCM?
Your Vehicle Identification Number (VIN) allows us to program the Body Control Module with the exact software and vehicle-specific options (like keyless entry, power seat type, lighting package, etc.) that your car had from the factory. This ensures seamless integration and proper function without a trip to the dealer.
Is this a simple plug-and-play installation?
For most vehicles, yes. Because we pre-program the module, the physical installation is a direct swap. In some cases, as with many modern vehicle electronics, a simple ‘relearn’ procedure for the brake pedal position sensor or airbag system may be necessary. This can often be done by a local mechanic with a professional scan tool if required.
What is the ‘Airbag System Sync’ procedure?
The BCM communicates with the airbag system’s computer (SDM). If the airbag warning light is on after installation, it means they need to be electronically ‘re-introduced’. A mechanic with a high-level diagnostic tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and clear the light.
Will I need to get my keys reprogrammed?
No. Since we program the module to your VIN, it is configured to work with your vehicle’s existing security system and keys. You will not need to perform a separate key relearn procedure.
Is there a core charge or do I need to send my old part back?
No, there is absolutely no core charge for this part. You can keep your old module, which can be helpful if you ever need to reference its original part number.