Is your GM vehicle suffering from strange and frustrating electrical problems?
The Body Control Module, or BCM, is the central command center for your vehicle’s body electronics. It manages everything from your power windows and locks to the interior lights, security system, and instrument cluster warnings. When the BCM starts to fail, it can cause a cascade of confusing issues that can be difficult to diagnose, often mimicking problems with individual components.
Common Symptoms of a Failing GM BCM:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights staying on, flickering, or not working at all.
- ✔ The security system acting up, preventing the car from starting (anti-theft light on).
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ False warnings on the dashboard, such as ‘Service Airbag’ or ‘Service Traction System’.
- ✔ Wipers turning on by themselves or not responding to the switch.
- ✔ Rapid battery drain with no obvious cause.
From the Diagnostic Bay
We had a 2011 Chevy Impala come in that was driving the owner crazy. The dome light would randomly refuse to turn off, draining the battery overnight. They had already replaced the battery and checked all the door jamb switches. After a quick diagnostic scan, we traced the fault to an internal failure in the BCM. Instead of a costly trip to the dealer for a new module and programming fees, we installed one of our pre-programmed units. The customer provided their VIN, we shipped the part, and they swapped it in their driveway. The problem was solved instantly, saving them hundreds of dollars and a lot of headaches.
Why Choose Our Programmed GM Body Control Module?
This isn’t just a replacement part; it’s a complete solution. We eliminate the most difficult part of the repair: the programming. Simply provide us with your vehicle’s VIN during checkout, and our technicians will flash this module with the latest, most stable software direct from GM. This ensures perfect compatibility and function for your specific vehicle’s options. You get a BCM that is ready for installation right out of the box, saving you from expensive dealership programming fees and the need for specialized scan tools.
This module is a direct-fit replacement for a wide range of original equipment part numbers, including 15299986, 22860591, 25892622, 20815898, and many more. Please see the extensive fitment list to confirm compatibility with your vehicle.
Installation and Post-Install Considerations
While the physical swap is often straightforward, please be aware of a few potential post-installation steps. After installing your new Programmed GM Body Control Module, some vehicles may require one of the following procedures for full functionality:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure brake lights and traction control work correctly.
Always consult a factory service manual or a qualified technician for guidance specific to your vehicle.
Frequently Asked Questions
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer in your vehicle that controls and monitors a wide variety of electronic accessories not related to the engine, such as power windows, locks, lights, wipers, and the security system.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and settings for your vehicle’s specific features and options. This ensures it works correctly right out of the box without a trip to the dealer.
Is this part difficult to install?
The physical installation is typically simple, involving disconnecting the battery and swapping the old module for the new one. However, as noted, some vehicles may require additional electronic relearn procedures with a professional scan tool for systems like the airbags.
What if my airbag light is on after I install this?
This is a known possibility. The new BCM needs to be electronically introduced to the airbag system (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure, which can be done by most automotive repair shops with a high-level diagnostic tool.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep your original module.
Will this fix my car not starting?
If your no-start issue is caused by the anti-theft system being triggered by a faulty BCM, then yes, this part will resolve the problem. Our programming ensures the security information matches your vehicle.