Is Your Van Plagued by Electrical Gremlins?
Are you dealing with flickering lights, malfunctioning power windows, or a security system that acts on its own? These frustrating and unpredictable electrical issues in your 2008-2012 Chevrolet Express 3500 are often caused by a failing Body Control Module (BCM). The BCM acts as the central hub for your vehicle’s body electronics, controlling everything from the interior lights and power locks to the instrument cluster and horn. When it starts to fail, it can create a cascade of problems that are difficult to diagnose and can take your work van off the road.
The Direct-Fit, Programmed Solution
This replacement Body Control Module, part number 25847588, is the definitive solution to restore your vehicle’s electronic systems to perfect working order. We eliminate the biggest hassle of BCM replacement: programming. Before we ship the module, our technicians will program it using your vehicle’s specific VIN. This crucial step ensures that the BCM communicates flawlessly with your van’s other electronic modules, like the Engine Control Module (ECM) and Transmission Control Module (TCM). You receive a part that is truly ready for installation, loaded with the latest GM software updates for optimal performance and reliability.
From the Diagnostic Bay
We had a 2011 Express 3500 work van come in that was driving the owner crazy. The interior lights would randomly turn on overnight, draining the battery. Sometimes the power door locks wouldn’t respond to the key fob. The owner had already replaced the battery and checked all the fuses. After connecting our diagnostic tool, we saw multiple communication error codes pointing to the BCM. Instead of a lengthy and expensive diagnostic process chasing wires, we installed a VIN-programmed BCM. The problems vanished instantly. It’s a perfect example of how a failing 2008-2012 Express 3500 BCM can mimic a dozen other issues, but the right part makes for a quick and permanent fix.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional power windows, mirrors, and door locks.
- ✔ Interior dome lights or exterior lights staying on or not working at all.
- ✔ The security or anti-theft light staying illuminated, preventing the engine from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Instrument panel gauges behaving erratically or going dead.
- ✔ False warnings appearing on the driver information center.
- ✔ HVAC (A/C and heat) controls not responding correctly.
Installation and Post-Install Procedures
While installation is straightforward, some systems may require a ‘relearn’ procedure after the new BCM is connected. This ensures all components are properly synced. Please be aware of the following potential steps:
- Airbag System Sync: If the airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional scan tool to sync the airbag system.
- Brake Pedal Position Relearn: A recalibration of the brake pedal position sensor may be needed to ensure proper brake light and traction control operation.
Note: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance. There is no core charge for this part.
Guaranteed Fitment for a Wide Range of GM Vehicles
This versatile 2008-2012 Express 3500 BCM is also a direct replacement for a wide array of other GM cars, trucks, and SUVs. Please verify your original part number against the list below to ensure compatibility. This module replaces the following part numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084.
Frequently Asked Questions
What is a Body Control Module (BCM)?
The 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, security system, and more.
Do I need to program this module?
No. We handle the programming for you. Simply provide your vehicle’s VIN when you place your order, and the BCM will arrive at your door pre-programmed with the latest GM software for your specific vehicle.
Is this part difficult to replace?
For most models, the BCM is located under the dashboard and is accessible with basic hand tools. The physical replacement is typically a simple plug-and-play process. However, some post-installation relearn procedures may require a professional diagnostic tool.
What happens if my airbag light is on after installation?
This is a common security feature. The airbag system (SDM) needs to be electronically ‘introduced’ to the new BCM. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to clear the light.
Will this fix a no-start issue?
It can. If the BCM is failing to recognize your key due to a faulty anti-theft system (Passlock/Passkey), it can prevent the vehicle from starting. A new, correctly programmed BCM will resolve this specific issue.
Does this part have a core charge?
No, there is no core charge. You are not required to send your old BCM back to us.