Restore Control and End Electrical Frustrations in Your Express Van
If you’re dealing with bizarre electrical issues in your Chevy Express—like power windows with a mind of their own, flickering dash lights, or a security system that randomly prevents your van from starting—you’re not alone. These are classic signs of a failing Body Control Module (BCM). As the nerve center for your van’s body electronics, when the BCM goes bad, it can make your reliable workhorse feel unpredictable and unsafe. This isn’t just an annoyance; it’s a problem that can disrupt your workday and compromise vehicle security.
This is the definitive solution: a replacement Body Control Module, part number 20864768, that arrives at your door fully programmed to your van’s specific Vehicle Identification Number (VIN). We handle the complex part for you. By flashing the module with the latest GM software updates matched to your VIN, we eliminate the need for an expensive trip to the dealership for programming. This is a direct-fit, ready-to-install solution designed to get your van back in service quickly and affordably.
A Technician’s Notebook: The Case of the Haunted Work Van
A contractor brought his 2011 Express 2500 into my bay with a list of complaints that sounded like a poltergeist had taken up residence. The dome light would stay on, the driver’s power lock wouldn’t work, and intermittently, the van wouldn’t start, just a click. He’d already replaced the battery and checked fuses. After connecting my scan tool, I saw multiple communication error codes (U-codes) pointing to the BCM. These modules, especially in hard-working vans, often fail from years of thermal stress and vibration. We installed a VIN-programmed BCM, and within an hour, every single issue was resolved. It’s a fix I’ve done hundreds of times, and it brings the vehicle’s electronics back to factory-fresh operation.
Is Your Express Van Showing These Symptoms?
A failing BCM can cause a wide range of issues. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The security or anti-theft light is on, causing a no-crank or no-start condition.
- ✔ The horn honks unexpectedly or doesn’t work when pressed.
- ✔ Warning lights on the dashboard (like Airbag or ABS) are illuminated for no apparent reason.
- ✔ Communication error codes stored, such as U0140, U0155, or other U-series codes.
A Straightforward Guide to Your BCM Installation
Replacing the 2008-2012 Express 2500 BCM is a manageable job for a DIYer or any professional technician. Since we program it beforehand, you can skip the most difficult step. For Express and Savana vans, 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 before starting work.
- Locate the Module: Access the BCM. On most Express vans, this involves removing a few dash panels around the center console or radio area to expose the module.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be pressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, wipers, etc.—to confirm the repair.
Important Post-Installation Information
While this module is programmed for your van, some vehicle systems may require a simple recalibration or sync procedure after installation. This is a normal part of the process.
- Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure correct brake light operation and to prevent issues with the traction control system.
- No Core Charge: We do not require you to send your old module back. There is no core charge or deposit associated with this purchase.
Disclaimer: Vehicle systems vary. For procedures specific to your exact model and year, consulting a factory service manual is always the best practice.
Verified Vehicle Compatibility
This Body Control Module is a direct replacement for a wide range of GM vehicles and part numbers. Please verify your vehicle is on this list and that your original part number is listed below. The key to a successful repair is this pre-programmed 2008-2012 Express 2500 BCM and its compatibility with many other models.
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
Fits these models (and more):
AVALANCHE 1500 10
CAPRICE 11-13
CAPTIVA SPORT 12
CTS 08-13
DTS 06-11
ENCLAVE 08-12
EQUINOX 07-09
ESCALADE 10
ESCALADE ESV 10
ESCALADE EXT 10
EXPRESS 1500 VAN 08-12
EXPRESS 2500 VAN 08-12
EXPRESS 3500 VAN 08-12
G8 08-09
HUMMER H2 08-09
IMPALA 06-13
LUCERNE 06-11
MONTE CARLO 06-07
OUTLOOK 07-10
SAVANA 1500 VAN 08-12
SAVANA 2500 VAN 08-12
SAVANA 3500 VAN 08-12
SRX 07-09
STS 10
SUBURBAN 1500 10
TAHOE 10
TORRENT 07-09
TRAVERSE 09-12
VUE 08-10
YUKON 10
YUKON XL 1500 10
Frequently Asked Questions
Frequently Asked Questions
What exactly does a Body Control Module (BCM) do?
The BCM is a computer that acts as the central hub for your vehicle’s body electronics. It reads inputs from switches (like your window switch or headlight switch) and controls outputs (like the window motor or headlamps). It manages dozens of convenience and security features.
Why is VIN programming so important?
Your vehicle’s VIN is tied to its specific options, security system, and software calibrations. Programming the BCM to your VIN ensures it works seamlessly with your vehicle’s existing systems, just like a module from the factory. It prevents compatibility issues and eliminates the need for dealer tools.
How do I provide my VIN after purchase?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot ship your part until we receive this information, as the programming is the first step in our fulfillment process.
Is this a difficult part for a DIYer to install?
For someone with basic mechanical skills and tools, this is a very manageable repair. The most difficult part is typically accessing the module behind dash panels. Since the programming is already done, the electrical part is just plug-and-play.
What if my airbag light comes on after I install it?
This is not a sign of a defective part. The new BCM simply needs to be electronically ‘introduced’ to the airbag’s computer (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure with a bi-directional scan tool, which most professional repair shops can perform.