2008-2012 Express 3500 Van Body Control Module 25847588 Programmed To Your VIN VIN BCM

Restore Full Electrical Control to Your GM Vehicle

If you’re dealing with baffling electrical issues in your 2008-2012 Express 3500—like power windows with a mind of their own, flickering dash lights, or a security system that prevents your van from starting—you’ve likely met the culprit: a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen how a faulty BCM can turn a reliable workhorse into a source of constant frustration. It’s the vehicle’s central nervous system for all body-related electronics, and when it fails, chaos ensues.

This isn’t just a replacement part; it’s a complete, hassle-free solution. We take the biggest headache out of the repair process by pre-programming this BCM specifically for your vehicle using your VIN. It arrives loaded with the latest stable software updates from GM, meaning you can bypass the expensive trip to the dealership for programming. You get a reliable, fully functional module ready for installation right out of the box.

Is Your Vehicle Showing These Symptoms?

A failing BCM can cause a wide range of problems that may seem unrelated. Here are the most common signs I’ve diagnosed in my shop:

• ✔ Erratic power windows, door locks, or interior/exterior lights.
• ✔ The security or anti-theft system light stays on, preventing the engine from starting.
• ✔ Horn honking unexpectedly or not working at all.
• ✔ Dashboard warning lights (like the airbag light) illuminating for no reason.
• ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U0140, U0155, or B1001.
• ✔ Wipers activating on their own or not functioning when needed.

A Straightforward Guide to BCM Installation

For the confident DIYer or professional mechanic, replacing the BCM is a manageable job. Follow these steps to ensure a smooth installation.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
2. Locate the BCM: On the Express and Savana vans, the BCM is typically located behind the center dash panel. On other compatible models, it may be under the driver’s side dash or near the steering column.
3. Disconnect the Old Module: Carefully unplug all electrical connectors. They have locking tabs, so be gentle to avoid damaging the wiring harness.
4. Remove the Old BCM: Unbolt the module from its mounting bracket and remove it from the vehicle.
5. Install the New BCM: Mount your new, pre-programmed BCM in the same location and secure it with the original hardware.
6. Reconnect Everything: Firmly plug all electrical connectors back into the new module. You should hear a click as they lock into place.
7. Power Up: Reconnect the negative battery terminal.
8. Perform Final Setup: Follow the critical post-installation procedures below to ensure full functionality.

Critical Post-Installation Steps

After installing your new BCM, a few final steps are required to synchronize the module with your vehicle’s other systems. These procedures are vital for safety and proper operation.

• Airbag System Reset: To clear the airbag warning light, you must perform the ‘Setup SDM Primary Key in BCM’ procedure. This requires a professional-grade diagnostic scan tool. This step ensures the airbag system is correctly communicating with the new BCM.
• Brake Pedal Position Sensor Relearn: Some vehicles will require a brake pedal position sensor recalibration. This ensures the brake lights and stability control systems function correctly. This is also performed with a capable scan tool.

Note: The exact procedures can vary slightly by model. If you are not equipped with the necessary diagnostic tools or are unsure about these steps, we strongly recommend seeking assistance from a qualified professional technician.

Will This Fit My Vehicle?

This BCM is a direct-fit replacement for a wide range of GM vehicles. Please verify your part number or match your vehicle from the list below. This module replaces 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.