Restore Full Functionality to Your GM Vehicle’s Electronics
Is your Chevy Express, GMC Savana, or other compatible GM vehicle plagued by strange electrical problems? Flickering lights, malfunctioning power windows and locks, or a persistent security warning light are all classic signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a cascade of frustrating and difficult-to-diagnose issues. This replacement Body Control Module is the definitive solution to restore your vehicle’s proper operation without a costly trip to the dealership.
From the Diagnostic Bay
We had a 2011 Express 3500 work van come in that was a complete electrical nightmare. The driver reported the dome lights would stay on, the power locks worked intermittently, and the radio would randomly shut off. He had already replaced the battery and checked all the fuses. After connecting our scan tool, we saw multiple communication loss codes with various modules. All signs pointed to the central hub: the BCM. Instead of a complex diagnostic and programming job, we installed a VIN-programmed module just like this one. The new module immediately resolved all the issues, getting the van back on the road and earning money for its owner the same day.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors not working correctly.
- ✔ Horn sounding unexpectedly or not at all.
- ✔ Vehicle security system faults or anti-theft light staying on.
- ✔ Intermittent dashboard warning lights with no clear cause.
- ✔ Communication errors between various electronic modules.
- ✔ Problems with the heating and A/C blower motor controls.
Solving Issues with Your Express 3500 Body Control Module
Don’t let a faulty BCM keep your vehicle off the road. Our service simplifies the repair process. This module is a direct replacement for a wide range of GM part numbers and fits dozens of models, including the Chevy Express, GMC Savana, Cadillac Escalade, Chevy Tahoe, and Buick Enclave. The key benefit is our pre-programming service. When you purchase, simply provide us with your vehicle’s VIN. We will flash the module with the latest GM software specific to your vehicle’s configuration. This means when you receive it, it’s ready for installation, saving you hundreds in dealership programming fees.
Installation and Post-Install Notes
After installing your new Express 3500 Body Control Module, some vehicles may require additional relearn procedures. These are simple steps that can often be completed with a capable bi-directional scan tool. The most common are:
- Airbag System Sync: If your airbag light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the modules.
- Brake Pedal Position Relearn: This may be required to ensure your brake lights and traction control system function correctly.
Always consult a factory service manual or a qualified technician for vehicle-specific instructions. There is no core charge for this part; you can keep your old module.
Frequently Asked Questions
Do I need to program this Body Control Module?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN at checkout, and the module will arrive ready to be installed, flashed with the latest GM software for your specific vehicle.
What does the BCM actually do?
The Body Control Module acts as the central computer for your vehicle’s comfort and convenience features. It controls power windows, locks, lights, wipers, the security system, and many other electronic functions not related to the engine or transmission.
How do I know for sure that my BCM is the problem?
While the symptoms listed are strong indicators, a full diagnosis with a professional scan tool is the best way to be certain. A technician can check for communication codes (U-codes) and directly test the BCM’s inputs and outputs to confirm it’s the source of the fault.
Will this fit my vehicle if my original part number is different?
Yes, this module replaces a long list of original GM part numbers. As long as your vehicle make, model, and year are on the compatibility list, this module will function as a direct replacement once programmed to your VIN.
What tools are needed for the post-installation procedures?
The potential post-installation procedures, like the airbag sync or brake pedal position relearn, require a bi-directional diagnostic scan tool. Many professional repair shops and some advanced DIY mechanics will have this equipment.