Are you experiencing frustrating and unpredictable electrical problems in your Chevy Express or GMC Savana van? Issues like flickering lights, malfunctioning power windows and locks, or a security system that acts up are common indicators of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a wide range of confusing symptoms. This replacement Body Control Module, part number 25847589, is the definitive solution to restore your vehicle’s functionality and reliability.
We make the repair process simple. Unlike going to a dealership, this BCM comes pre-programmed to your vehicle’s specific VIN. Simply provide us with your VIN after purchase, and our technicians will flash the module with the latest GM software updates before it ships. This means no expensive programming fees or trips to the mechanic for software setup. It’s a true plug-and-play solution designed to get your work van or personal vehicle back in service quickly.
From the Diagnostic Bay
We had a 2011 Express 3500 work van come into the shop with the strangest set of problems. The driver reported that the dome lights would stay on, the radio would randomly turn off, and the power door locks only worked intermittently. He had already replaced the battery and checked all the fuses. After connecting our diagnostic scanner, we saw multiple communication errors pointing towards the BCM. Instead of a complex wiring chase, we installed a VIN-programmed BCM. All the bizarre electrical gremlins vanished instantly. It’s a perfect example of how a single faulty module can create chaos throughout the vehicle’s systems.
Resolving Your Express 3500 Body Control Module Issues
A faulty BCM doesn’t have to mean costly diagnostic time and dealership appointments. By replacing the unit with a component programmed specifically for your van, you are directly addressing the root cause of the electrical faults. This Express 3500 Body Control Module is tested for reliability and loaded with your vehicle’s unique configuration, ensuring all factory-installed options work as intended from the moment you plug it in.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that flicker, stay on, or don’t turn on at all.
- ✔ Erratic or false warnings on the instrument cluster (e.g., ‘Service Theft System’).
- ✔ The vehicle’s security system preventing it from starting.
- ✔ Communication issues with other modules, leading to various diagnostic trouble codes.
- ✔ Malfunctioning heating and A/C controls.
Important Installation Notes: While this module is designed for straightforward installation, some vehicles may require additional steps. If your airbag warning light illuminates after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. Additionally, a ‘Brake Pedal Position Relearn’ may be necessary on certain models to ensure correct brake light and traction control operation. Always consult a factory service manual for vehicle-specific instructions.
This module is a direct replacement for a wide range of GM part numbers, including: 10382479, 15093910, 15276271, 15819552, 20815898, 22860591, 25847589, 25892622, and many more. Please verify the part number on your original module to ensure compatibility.
Frequently Asked Questions
What does the Body Control Module (BCM) do on my Express van?
The BCM acts as the main computer for your van’s non-engine related electronics. It controls functions like the power windows, door locks, interior and exterior lighting, security system, and climate controls.
Is this module ready to install right out of the box?
Yes! This BCM is sold as a plug-and-play solution. We program it using the VIN you provide, so it’s ready for installation without needing a trip to the dealership for programming.
How do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship the module without it.
What if the airbag light comes on after I install the BCM?
In some cases, the new BCM needs to be synced with the airbag system (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure with a professional-grade scan tool to turn off the light.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep your original module.