Is Your GM Vehicle Acting Possessed?
If you’re dealing with a frustrating array of electrical gremlins—from flickering lights and malfunctioning power windows to a car that won’t start—the culprit is often a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s body electronics, managing everything from interior lighting and security systems to door locks and climate controls. When it fails, it can cause unpredictable and confusing symptoms that are difficult to diagnose.
This is a direct-fit replacement for a wide range of GM vehicles. More importantly, it arrives at your door pre-programmed to your vehicle’s specific VIN. This crucial step ensures compatibility and functionality right out of the box, saving you from a costly trip to the dealership for programming. Simply provide us with your VIN after purchase, and our experts will handle the rest, loading the latest GM software onto the module before it ships.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors not working correctly.
- ✔ The security system engaging randomly or preventing the engine from starting.
- ✔ The horn honking unexpectedly or not working at all.
- ✔ Dashboard warning lights (like the airbag or brake light) illuminating for no reason.
- ✔ Intermittent no-start or no-crank conditions.
- ✔ Communication errors with other vehicle modules.
Why Choose Our Programmed GM Body Control Module?
Getting your vehicle back on the road shouldn’t be complicated. Our service is designed to be the most efficient solution. By matching the programming to your VIN, we ensure the BCM works with your vehicle’s specific options and security systems. This eliminates the need for expensive scan tools or dealership appointments for setup. While some vehicles may require a simple relearn procedure after installation (see below), the most complex part of the job is already done for you.
Post-Installation Procedures
After installing your new BCM, some systems may require recalibration. These are typically simple procedures for a qualified mechanic.
- Airbag System Sync: If the airbag warning light is on 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 relearn may be necessary to ensure correct brake light operation and to prevent issues with the traction control system.
Please note: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Frequently Asked Questions
What is a Body Control Module (BCM)?
The BCM is a computer in your vehicle that controls and monitors a wide range of electronic body functions not related to the engine, such as power windows, locks, lights, wipers, and the security system.
How do I know if my BCM is the problem?
Common signs include multiple, unrelated electrical issues happening at once. If your lights, locks, and security system are all acting erratically, the BCM is a likely suspect. A professional diagnostic scan can confirm the failure by revealing communication error codes.
What does ‘VIN Programmed’ mean for me?
It means we flash the module with the correct software and settings for your exact vehicle using the VIN you provide. This makes installation much simpler, as it bypasses the need for dealership-level programming tools for the initial setup.
Is this part difficult to install?
The physical replacement is typically straightforward, often involving unplugging the old module and plugging in the new one. It’s usually located under the dashboard. However, some vehicles may require post-installation relearn procedures for systems like the airbags or brakes, which may require a professional scan 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.
What if my airbag light comes on after I install it?
This is a known possibility. It means the new BCM needs to be electronically ‘introduced’ to your vehicle’s airbag system. A technician with a compatible scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve it.