Restore Your Van’s Electrical System with a Plug-and-Play BCM
If you’re dealing with bizarre electrical issues in your 2008-2012 GMC Savana 3500—like flickering lights, malfunctioning power windows and locks, or a security light that won’t turn off—you’re likely facing a failing Body Control Module (BCM). As a work vehicle, downtime isn’t an option. This replacement Savana 3500 Body Control Module is the reliable, straightforward solution to get your van back in service without the high costs and scheduling hassles of a dealership visit.
We take the guesswork out of the repair. Simply provide your van’s VIN during checkout, and our technicians will program the module with the latest GM-certified software specifically for your vehicle. It arrives at your door ready for installation, eliminating the need for expensive scan tools or programming appointments. This is the most efficient way to solve those frustrating electrical gremlins for good.
A Technician’s Notebook: The Intermittent Gremlin
I once had a fleet customer with a 2011 Savana 3500 work van that was driving his crew crazy. The radio would randomly shut off, the dome lights would stay on, and occasionally, it wouldn’t start. They’d replaced the battery and checked the alternator, but the problems persisted intermittently. After connecting my scanner, I saw several ‘U’ codes, specifically a U0140 (Lost Communication with BCM). These communication codes are a classic sign. The internal circuits of the original BCM were failing under certain temperature conditions, causing these random faults. A new, properly programmed BCM solved every single issue. It’s a fix I’ve performed hundreds of times on these workhorses.
Is Your Van Showing These Symptoms?
A failing BCM is the central command for your vehicle’s body electronics. When it goes bad, it can cause a wide range of confusing problems. Here are the most common signs:
- ✔ Erratic interior or exterior lights (flickering, staying on, or not working at all).
- ✔ Power windows, locks, or mirrors behaving unpredictably.
- ✔ The security system light is on, or the alarm goes off randomly.
- ✔ Communication Diagnostic Trouble Codes (DTCs) like U0140, U0155, or B1001.
- ✔ The engine cranks but refuses to start due to a security system fault.
- ✔ The horn honking unexpectedly or not working when pressed.
- ✔ Wipers activating on their own or not responding to the switch.
A Straightforward Guide to Your BCM Installation
Replacing your Savana 3500 Body Control Module is a manageable job for a DIYer or any professional technician. Follow these steps for a smooth installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes before beginning.
- Locate the BCM: In most Savana and Express vans, the BCM is located in the center dash area, often behind the glove box or a lower dash panel. You may need to remove a few trim pieces to gain access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical harnesses. Ensure they click into place.
- Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- Perform Final Checks: Start the vehicle and test all body functions—lights, locks, windows, wipers, and radio. In most cases, you’ll be ready to go. However, be aware of potential post-install procedures noted below.
Important Post-Installation Information
While this module is programmed to your VIN, some GM security and safety systems may require a ‘handshake’ procedure after installation.
- Airbag System Sync: If the airbag (SRS) warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool to sync the modules and clear the light.
- 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.
- No Core Charge: You are not required to return your old module. This saves you time and the cost of return shipping.
Will This Fit My Vehicle?
This BCM is a direct replacement for a wide range of GM vehicles and is guaranteed to be compatible if your original part number is listed below. It is programmed specifically for your vehicle using the VIN you provide.
Part Number: 20864768
Interchangeable Part Numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084
This part fits many GM models, including but not limited to:
- 2008-2012 Savana 1500/2500/3500 Van
- 2008-2012 Express 1500/2500/3500 Van
- 2007-2012 Acadia
- 2010 Avalanche 1500
- 2011-2013 Caprice
- 2012 Captiva Sport
- 2008-2013 CTS
- 2006-2011 DTS
- 2008-2012 Enclave
- 2007-2009 Equinox
- 2010 Escalade, ESV, EXT
- 2008-2009 Hummer H2
- 2006-2013 Impala
- 2006-2011 Lucerne
- 2006-2007 Monte Carlo
- 2007-2010 Outlook
- 2007-2009 SRX
- 2010 STS
- 2010 Suburban 1500
- 2010 Tahoe
- 2007-2009 Torrent
- 2009-2012 Traverse
- 2008-2010 Vue
- 2010 Yukon & Yukon XL 1500
Always verify your part number before ordering. If you are unsure, please contact us with your VIN.
Frequently Asked Questions
Frequently Asked Questions
Why do you need my VIN number?
Your Vehicle Identification Number (VIN) allows us to program the Savana 3500 Body Control Module with the exact software and settings your van had when it left the factory. This ensures compatibility with your specific options and security system, making installation much simpler.
Is this a difficult part to install myself?
For someone with basic mechanical skills, this is a very manageable repair. The primary challenge is typically accessing the module’s location within the dash. No special programming tools are required on your end since we handle all the programming before shipment.
What if my airbag light comes on after I install it?
This is a known possibility with GM vehicles. It means the new BCM and the airbag’s Sensing and Diagnostic Module (SDM) need to be electronically synced. This procedure, called ‘Setup SDM Primary Key in BCM’, must be performed by a shop with a capable bi-directional scan tool.
Do I need to send my old BCM back?
No. We do not require a core return for this part. You can keep your original module, which saves you the hassle and expense of a core charge and return shipping.
Will this fix my ‘Service StabiliTrak’ message?
It can. The BCM communicates with the traction control and StabiliTrak systems. If the BCM is faulty, it can trigger these warnings. In some cases, a Brake Pedal Position Relearn may be needed after installation to clear these messages.