Restore Your Van’s Electrical System with a Pre-Programmed BCM
If your 2008-2012 Express 3500 Van is plagued by baffling electrical problems, a failing Body Control Module (BCM) is often the culprit. As the central command center for your vehicle’s body electronics, a faulty BCM can cause a cascade of issues that can sideline your workhorse. This isn’t just an inconvenience; for a commercial vehicle, it’s lost time and money. We offer a reliable, straightforward solution: a replacement BCM, part number 20864768, that arrives at your door programmed specifically for your van.
Case Study: A Tricky Diagnosis
I remember a 2011 Express 3500 from a local plumbing company that came into my bay with a complaint of the battery dying overnight. The battery and alternator tested fine. After hours of chasing circuits, we found the BCM was keeping the interior lights relay energized long after the van was shut off, causing a parasitic draw. Swapping in a pre-programmed BCM like this one solved the problem instantly, getting the van back on the road for service calls the very next day. These intermittent issues are classic signs of BCM failure, and a direct replacement is the cleanest fix.
Is Your Van Showing These Symptoms?
A failing BCM can manifest in numerous ways. Over my 20+ years in diagnostics, I’ve seen these modules cause some of the most frustrating electrical gremlins. Check if your vehicle is experiencing any of the following:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights staying on, flickering, or not working at all.
- ✔ The security system acting up, or the vehicle refusing to start (Service Theft System light).
- ✔ Dashboard warning lights illuminating for no reason (e.g., ABS, Airbag).
- ✔ Communication error codes, particularly U-codes (like U0100, U0140), stored in the system.
- ✔ Wipers or radio functioning intermittently or not at all.
How Our Cloning Service Works for You
Forget expensive dealership visits and the hassle of programming. Our service is designed to be as simple as possible. We transfer the critical data from your original BCM to this replacement unit. This means the module arrives ready for installation, retaining all your vehicle’s specific settings and key information. All we need is your Vehicle Identification Number (VIN) at checkout to ensure a perfect data match. This is a true plug-and-play solution for your Express 3500 Van BCM.
A Straightforward Guide to Installation
For the confident DIYer or professional mechanic, installing this BCM is a manageable job. In most Express and Savana vans, it’s located in the center dash area.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the BCM: Access the BCM, which is typically found behind the center dash panel or glove box area. You may need to remove some trim panels to gain access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. Note their orientation. Then, unbolt or unclip the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount the new, pre-programmed BCM in the same location and reconnect all electrical connectors securely.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, locks, windows, radio, etc.—to confirm proper operation.
Verified Vehicle Compatibility
This Body Control Module is a direct-fit replacement for a wide range of GM vehicles. While this listing is focused on the Express 3500 Van BCM, it also fits other models. Please verify your original part number against our list. This module is compatible with service 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, and 95151084.
Key applications include:
- ✔ 2008-2012 Chevrolet Express 1500/2500/3500 Vans
- ✔ 2008-2012 GMC Savana 1500/2500/3500 Vans
- ✔ 2007-2012 GMC Acadia, Chevrolet Traverse, Buick Enclave
- ✔ 2006-2013 Chevrolet Impala
- ✔ 2010 Chevrolet Tahoe, Suburban 1500, Avalanche 1500
- ✔ 2010 GMC Yukon / Yukon XL 1500
- ✔ And many other GM models as listed in the fitment data.
Important Post-Installation Information
While our cloning service makes this a plug-and-play repair, some vehicle systems may require a quick sync-up procedure after installation. This is normal and ensures all safety systems are communicating correctly.
- Airbag System Sync: If the airbag light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure correct brake light and traction control operation.
Disclaimer: Vehicle systems vary. Always refer to a factory service manual or consult a qualified technician if you are unsure about any procedure.
What do you need from me to program the BCM?
What do you need from me to program the BCM?
After you complete your purchase, we just need the 17-digit Vehicle Identification Number (VIN) from your 2008-2012 Express 3500 Van. This allows us to program the module with the correct software and vehicle-specific options before we ship it.
Is this a plug-and-play part?
Yes, because we perform a cloning service using your VIN, this module is designed to be plug-and-play. You will not need to take it to a dealer for additional programming. However, please review the potential post-installation procedures like the airbag sync.
What is the difference between programming and cloning?
Programming involves loading the base GM software for your vehicle’s model. Our cloning service goes a step further by transferring the specific configuration, key data, and mileage from your original module, ensuring a seamless replacement and preventing security system lockouts.
Do I need to send my old BCM to you?
No, you do not need to send us your original part. We use your VIN to access the correct GM software. You will receive your original module back along with the newly programmed replacement unit.
Will this fix my check engine light?
The BCM primarily controls body electronics, not engine functions. If you have a check engine light, the issue is likely with the Engine Control Module (ECM) or another powertrain component. A BCM replacement typically resolves issues with lights, locks, windows, and security systems.