Restore Your Van’s Electrical System with a Plug-and-Play Solution
If your 2008-2012 Express 3500 Van is suffering from bizarre electrical issues, you’re not alone. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable workhorse into a source of constant frustration. It’s the central command for your vehicle’s body electronics, and when it goes, it can cause a cascade of problems that are often difficult to diagnose. This isn’t just an inconvenience; for a work van, it’s downtime that costs you money.
We offer a straightforward and dependable fix. This Body Control Module, part number 25847588, is the solution you need. The best part? We handle the complicated part for you. Simply provide your vehicle’s VIN at checkout, and our experts will program the module with the latest GM software specifically for your van. It arrives at your door ready for installation, saving you a costly trip to the dealership and their programming fees. Get your van’s accessories—from power windows to interior lights—working correctly again.
Case Study: A Tricky Diagnosis
I remember a 2011 Express 3500 from a local plumbing company that came into my bay with the strangest symptoms. The driver reported the radio would randomly shut off, the dome lights would flicker, and sometimes the power door locks wouldn’t respond. They had already replaced the battery and checked the alternator. Diagnostics showed a handful of communication error codes (U-codes), but nothing pointed to a single failed component. This intermittent chaos is a classic sign of a BCM starting to fail internally. After swapping in a VIN-programmed BCM like this one, all the electrical gremlins vanished. It was a 30-minute fix that saved them hours of further diagnostic headaches and potential lost jobs.
Is Your Express Van Showing These Symptoms?
- ✔ Erratic or non-functional power windows, mirrors, or door locks.
- ✔ Interior or exterior lights staying on, flickering, or not working at all.
- ✔ The security or anti-theft light is illuminated, preventing the engine from starting.
- ✔ Inconsistent or non-working radio and instrument cluster gauges.
- ✔ False warnings on the driver information center.
- ✔ Communication error codes, particularly U-codes like U0140, U0155, or U0100.
Your Straightforward BCM Installation Guide
Installing your new BCM is a manageable job for a DIYer or any professional mechanic. For the 2008-2012 Express 3500 Van, the BCM is typically located in the center dash area.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Access the Module: You will likely need to remove a few dash panels to gain access to the BCM. A simple set of trim removal tools will prevent any damage to your dashboard.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module and remove it from the vehicle.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely plug in all the electrical connectors. You should hear a click as they lock into place.
- Final Steps: Reassemble your dashboard panels and reconnect the negative battery terminal. Start the vehicle to confirm the fix.
Important Post-Installation Information
Because this module is pre-programmed, most functions should work immediately. However, on some GM vehicles, a couple of additional steps, known as relearn procedures, might be necessary. These synchronize the new BCM with other systems in your van.
- Airbag System Sync: If your airbag warning light is on after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool to complete and ensures the safety system is fully operational.
- Brake Pedal Position Relearn: To ensure correct brake light and traction control operation, a brake pedal position sensor recalibration may be required on certain models.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step.
Verified Vehicle Compatibility
This BCM is a direct replacement for a wide range of General Motors vehicles. Please verify your original part number is on this list. 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.
While this listing focuses on the 2008-2012 Express 3500 BCM, it also fits many other models including the Acadia, Enclave, Traverse, Tahoe, Yukon, Suburban, Escalade, Impala, Savana Vans, and more. Please check the detailed fitment list to confirm compatibility with your specific vehicle and options.
Frequently Asked Questions
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the Body Control Module with the exact software and settings your specific vehicle requires. This ensures all features work correctly right out of the box and makes installation much simpler.
Is this part really plug-and-play?
Yes, for the vast majority of vehicles. Because we program it to your VIN, you can avoid a trip to the dealer for programming. In some rare cases, minor relearn procedures like for the airbag or brake pedal sensor may be needed, which can be done with a capable scan tool.
Do I need to send my old BCM back?
No. We do not require a core return. You can keep your old module, which saves you the time and expense of shipping it back.
What tools are required for installation?
Basic hand tools are all that’s needed for the physical swap, such as a socket set and screwdrivers. A set of plastic trim removal tools is also highly recommended to avoid scratching or breaking your dash panels.
Will this fix my ‘Service Theft System’ message?
A faulty BCM is a very common cause of security system problems, including the ‘Service Theft System’ message and no-start conditions. Replacing it with our VIN-programmed module is a very effective way to solve this issue.