Restore full electrical functionality to your GM vehicle with this direct-fit Body Control Module (BCM). If you’re battling bizarre electrical gremlins like flickering lights, malfunctioning power windows and locks, or a security system that has a mind of its own, a failing BCM is the most likely culprit. This module acts as the central hub for your vehicle’s body electronics, and when it fails, it can cause a wide range of frustrating and difficult-to-diagnose issues. We make the repair process simple by pre-programming this module to your vehicle’s specific VIN, ensuring a seamless installation with the latest software updates from GM.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights (headlights, taillights, dome lights).
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ Vehicle security system faults or the engine failing to start due to anti-theft issues.
- ✔ Horn sounding unexpectedly or not working when pressed.
- ✔ Warning lights on the dashboard with no apparent cause.
- ✔ Communication errors with other vehicle modules when scanned with a diagnostic tool.
Solving Problems with a Pre-Programmed Express 3500 Body Control Module
This isn’t just a replacement part; it’s a complete solution. The biggest hurdle in replacing a modern BCM is the need for expensive, specialized programming at a dealership. We eliminate that step entirely. Simply provide us with your vehicle’s VIN after purchase, and our technicians will flash this module with the correct software and vehicle-specific configuration. This ensures that all the features your van came with will work correctly right out of the box. This module is a direct replacement for a wide range of part numbers, including 15828601, 25892622, 20815898, and many more, covering vehicles like the Chevy Express, GMC Savana, Cadillac Escalade, and Chevy Tahoe.
Installation and Post-Install Procedures
While this module is designed for a straightforward installation, some vehicles may require additional electronic ‘handshake’ procedures after the part is installed. These are not required for all vehicles but are important to be aware of:
- Airbag System Sync: If your airbag warning light illuminates after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional 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 correct brake light and traction control operation.
Always consult a factory service manual or a qualified technician for vehicle-specific instructions.
Frequently Asked Questions
What is a Body Control Module (BCM)?
The BCM is a computer in your vehicle that controls and monitors a wide variety of non-engine-related functions, such as power windows, locks, lights, security systems, and wipers. It’s the brain for your vehicle’s electronic accessories.
Do I need to get this module programmed by a dealer?
No. We handle all the programming for you before we ship the part. Just provide us with your vehicle’s 17-digit VIN during checkout or via message, and it will arrive ready to install with the latest GM software.
Is this installation plug-and-play?
For most vehicles, yes. You simply disconnect the old BCM and connect this new one. However, as noted, some models may require a simple relearn procedure for the airbag or brake pedal position sensor, which requires a capable scan tool.
What happens if my airbag light is on after I install this?
This indicates that the new BCM needs to be electronically synced with your vehicle’s airbag system (SDM). A technician with a professional-grade diagnostic tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
How do I find my original part number to confirm fitment?
Your original BCM will have a sticker on it with the part number. However, this module replaces dozens of different part numbers. As long as your vehicle’s Year, Make, and Model are on our fitment list, this module will work when programmed to your VIN.
Is there a core charge for my old part?
No, there is no core charge. You can keep your original module.