Are you battling persistent electrical gremlins in your GM vehicle? Issues like flickering lights, malfunctioning power windows and locks, or a security system that acts on its own are often signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it falters, it can cause a wide range of frustrating and difficult-to-diagnose problems. This replacement GM Body Control Module is the definitive solution to restore your vehicle’s functionality and peace of mind.
This isn’t just a generic part off the shelf. We provide a crucial service by programming this module specifically to your vehicle’s Vehicle Identification Number (VIN) before it ships. This ensures compatibility with your vehicle’s specific options and systems, greatly simplifying the installation process. By programming the unit with the latest software updates from GM, we also ensure optimal performance and reliability, addressing potential issues that were unknown when your vehicle first left the factory.
From the Diagnostic Bay
We had a 2010 Chevy Impala come into the shop with the owner convinced he needed a new alternator and battery. The interior lights would pulse, the radio would cut out, and sometimes the car wouldn’t start, just a click. He’d already replaced the battery twice. After checking the charging system, which was perfectly fine, we scanned the network and found multiple communication loss codes with the BCM. A failing BCM was starving other modules of data, causing system-wide chaos. We installed a VIN-programmed BCM, and all the bizarre electrical issues vanished instantly. It’s a classic case where the root cause isn’t the most obvious one.
Common Symptoms of a Failing GM BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security system engaging randomly or preventing the car from starting.
- ✔ Instrument cluster gauges behaving erratically or going dark.
- ✔ ‘Service Theft System’ or other warning messages on the dash.
- ✔ Complete no-start condition where the starter doesn’t engage.
- ✔ Communication errors with other vehicle modules when scanned.
Why Choose Our Programmed GM Body Control Module?
Replacing a BCM is not a simple swap. An unprogrammed module will not work correctly, leaving your vehicle inoperable. Our service eliminates the need for expensive dealership programming or specialized tools. Simply provide your VIN during checkout, and we handle the rest. The module arrives at your door ready for installation. For many models, after installation, you’re back on the road. Some vehicles may require a simple key relearn procedure or other minor calibrations, which are detailed in your service manual. We also include information on potential post-installation steps, such as the Airbag System Sync or Brake Pedal Position Relearn if they become necessary.
This module is a direct replacement for a wide range of part numbers, including: 10382479, 15093910, 15276271, 15872421, 20815898, 22860591, and many more. Please check the comprehensive fitment list to confirm compatibility with your exact make, model, and year.
Frequently Asked Questions
What does the Body Control Module (BCM) do?
The BCM is a computer that manages and controls many of your vehicle’s non-engine related functions, such as power windows, locks, lights, security system, wipers, and instrument panel functions.
Why is my VIN required for this part?
Your VIN allows us to program the BCM with the correct software and settings for your vehicle’s specific features and options. This ensures the module communicates correctly with other systems and functions as intended without needing a trip to the dealer.
Is this part difficult to install?
The physical installation is typically straightforward, involving unplugging the old module and plugging in the new one. Because we pre-program it, the complex software setup is already done. However, some vehicles may require additional relearn procedures (like for the brake pedal sensor or airbag system) which might require a professional scan tool.
What if the airbag light is on after I install the BCM?
If the airbag light appears, it means the new BCM needs to be synced with the airbag’s computer (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure, which must be performed with a professional-grade diagnostic tool.
Will this BCM fix my car’s specific electrical problem?
This BCM will correct issues directly caused by a faulty module. While the symptoms listed are very common for BCM failure, we always recommend a proper diagnosis by a qualified technician to confirm the BCM is the source of your problem before ordering.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.