Is your 2012 Captiva Sport or other GM vehicle suffering from strange and unpredictable electrical problems? A faulty Body Control Module (BCM) is often the culprit. The BCM acts as the central nervous system for your vehicle’s body electronics, managing everything from your power windows and door locks to your interior lights and security system. When it begins to fail, it can create a cascade of frustrating issues that are difficult to diagnose.
This is a direct-fit replacement Body Control Module, part number 20935349, for a wide range of General Motors vehicles. The most significant benefit of ordering from us is that we program the module to your vehicle’s specific VIN before shipping. This eliminates the need for an expensive trip to the dealership for programming and allows for a much simpler installation process. Restore proper function to your vehicle’s accessories with a reliable, VIN-programmed BCM.
From the Diagnostic Bay
We once had a 2011 GMC Acadia in the shop with a list of bizarre symptoms the owner couldn’t explain. The power liftgate would open on its own, the radio presets would vanish, and the anti-theft light would flash randomly. After checking all the usual suspects like the battery and grounds, we hooked up our professional scan tool. It revealed a flood of communication errors all pointing back to one component: the BCM. A failing BCM was corrupting the data network. We installed a VIN-programmed module just like this one, and every single electrical gremlin disappeared. It’s amazing how one module can cause so much chaos.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional power windows, mirrors, or door locks.
- ✔ Interior dome lights or dashboard lights flickering, staying on, or not working.
- ✔ The security system acting up, or a ‘Service Theft System’ message on the dash.
- ✔ Horn honking randomly or not working when pressed.
- ✔ Windshield wipers activating on their own or not turning off.
- ✔ No communication with the BCM when using a diagnostic scan tool (U-codes).
- ✔ Inconsistent operation of the key fob.
Why Choose Our Programmed Captiva Sport Body Control Module?
This isn’t just a part; it’s a complete solution. By providing us with your VIN during checkout, you receive a module that is loaded with the latest GM software and is specifically configured for your vehicle’s options. This plug-and-play approach saves you time, money, and the headache of arranging for dealer-level programming. This module is compatible with a vast array of GM vehicles, including the Equinox, Traverse, Impala, various Express/Savana vans, and many more. Please verify your original part number against our extensive cross-reference list to ensure perfect compatibility.
Installation and Post-Install Procedures
While this BCM is designed for straightforward installation, some vehicles may require additional steps after the part is connected. These are known as ‘relearn’ procedures and can sometimes be necessary to sync the new module with other systems in your vehicle.
- Airbag System Sync: If your airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional-grade scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure your brake lights and traction control system operate correctly.
Disclaimer: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
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 range of electronic accessories not related to the engine, such as power windows, locks, lights, wipers, and the security system.
Do I need to take this part to a dealer for programming?
No. The main benefit of our service is that we program the BCM to your vehicle’s VIN before we ship it to you. This means it’s ready for installation right out of the box, saving you a trip to the dealership.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive the VIN for programming.
Is this BCM difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery and swapping the old module with the new one. The location varies by model but is often under the dash. However, as noted, some vehicles may require simple electronic relearn procedures after installation.
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 the airbag system (SDM). A qualified mechanic with a professional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is there a core charge for this part?
No, there is no core charge. You can keep your old module.