Restore Full Functionality to Your GM Vehicle
Is your van or SUV plagued by baffling electrical problems? Flickering lights, unresponsive power windows, a dead instrument cluster, or a no-start condition can bring your work to a halt. These are classic signs of a failing Body Control Module (BCM), the central command center for your vehicle’s electronics. This replacement BCM is the definitive, reliable solution to get your vehicle back in service, arriving pre-programmed to your specific Vehicle Identification Number (VIN) for a seamless installation process.
Common Symptoms & Your Solution
A failing BCM can cause a wide range of frustrating issues that seem unrelated. If you’re experiencing any of the following, this module is your answer:
- Intermittent or non-working power windows, door locks, or interior lights.
- Warning lights on the dashboard that stay on or appear randomly (e.g., security, airbag).
- Problems with the radio, climate control, or other accessories.
- The vehicle fails to start, or the starter doesn’t engage, even with a good battery.
- Erratic instrument panel gauges or complete loss of the cluster.
Instead of spending a fortune at the dealership, you can install this professionally programmed 2008-2012 Express 3500 Body Control Module yourself or have your trusted mechanic do it, saving significant time and money.
Features & Benefits
- ✔ VIN-Specific Programming: We flash the module with the latest GM software using your vehicle’s VIN. This ensures perfect compatibility with your specific options and systems, eliminating the need for an expensive trip to the dealer for programming.
- ✔ Broad Model Compatibility: While perfect for your van, this module is a direct replacement for a wide range of GM vehicles, including the Savana, Acadia, Impala, Tahoe, and more. See the full compatibility list for details.
- ✔ No Core Charge: Keep your old part. There are no core fees or hassles with sending the original module back, simplifying your repair process.
- ✔ Restored Performance: A new BCM restores communication between your vehicle’s electronic systems, fixing those strange gremlins and ensuring everything works as the factory intended.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: The Brains of Your Operation
Think of the BCM as the central nervous system of your work van. It doesn’t just control comfort features; it manages critical data for the anti-theft system, airbag deployment, and even brake light operation. When it fails, it can cause chaos. Installing a generic, non-programmed module is a recipe for disaster, often leading to more errors or a vehicle that won’t start at all. Our VIN-programming service is not just a convenience—it’s a critical step that ensures every component in your vehicle communicates correctly, providing the reliability you depend on to get the job done.
This replacement is the most efficient way to solve complex electrical issues. By providing us with your VIN upon purchase, you receive a part that is truly ready for your vehicle. For a dependable fix that restores your vehicle’s electronic integrity, this 2008-2012 Express 3500 Body Control Module is the professional’s choice.
Frequently Asked Questions
Why do you need my VIN number?
Your vehicle’s VIN (Vehicle Identification Number) allows us to program the Body Control Module with the exact software and settings for your specific make, model, year, and factory-installed options. This step is essential for the module to function correctly and communicate with other computers in your vehicle.
Is this a difficult part to install?
For someone with moderate mechanical experience, the physical installation is typically straightforward as the BCM is often located in an accessible area like under the dash. However, due to the electronic nature of the part, some vehicles may require post-installation procedures, such as an airbag system sync or brake pedal position relearn, which may require a professional scan tool.
What happens if I install it and the airbag light comes on?
This is a known possibility on some GM models. It means the new BCM needs to be electronically introduced to the airbag system’s computer (SDM). A procedure called ‘Setup SDM Primary Key in BCM’ must be performed with a compatible high-end diagnostic tool to sync the modules and turn off the light.
Will this fix my specific electrical problem?
The BCM is responsible for a vast number of electronic functions, and this part will resolve issues directly caused by a faulty module. While the symptoms listed are common indicators of BCM failure, we always recommend proper vehicle diagnostics to confirm the BCM is the source of the problem before ordering.
My original part number isn’t 20921435, will this still work?
Yes, most likely. This BCM, part number 20921435, replaces a long list of previous GM part numbers. Please check the detailed part number list in our description to confirm that your original number is included as a compatible interchange.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty, giving you confidence in your purchase.