Restore Full Functionality to Your Workhorse Van
If your 2008-2012 GMC Savana or Chevrolet Express van is acting possessed—with flickering lights, power locks going haywire, or a security light that won’t turn off—a failing Body Control Module (BCM) is the likely culprit. As the central command for your vehicle’s body electronics, a faulty BCM can bring your work to a grinding halt. This isn’t just an annoyance; it’s a direct hit to your productivity. This replacement Body Control Module is the reliable, straightforward solution to get your van back in service quickly and affordably.
We take the guesswork and dealer hassle out of the equation. Before we ship, we program this module with the latest GM software updates, specifically matched to your van’s Vehicle Identification Number (VIN). This means no expensive trips to the dealership for programming. You get a part that’s ready for installation right out of the box, designed to restore the precise electronic functions your vehicle had when it left the factory.
A Technician’s Notebook
I remember a call from a local plumber whose 2011 Savana 2500 was a mess. The dome lights would stay on, draining the battery overnight, and the power door locks had a mind of their own. He was losing work time and was worried about a massive repair bill. After a quick check for shorts and bad grounds, we pinpointed the BCM. Instead of sending him to a dealer, we sourced a VIN-programmed module just like this one. The swap took less than an hour, and his van was back to being a reliable work tool the same afternoon. This is the exact fix for those frustrating, hard-to-diagnose electrical gremlins.
Common Signs of a Failing BCM
The BCM is the nerve center for many of your van’s features. If you’re experiencing any of these symptoms, a failing 2008-2012 Savana 2500 Van BCM is a strong possibility:
- ✔ Erratic power windows, mirrors, or door locks
- ✔ Interior or exterior lights not working correctly or staying on
- ✔ The security system light is illuminated, or the alarm randomly triggers
- ✔ Intermittent no-start condition where the engine cranks but won’t fire
- ✔ Horn not working or sounding off unexpectedly
- ✔ Diagnostic trouble codes (DTCs) related to communication, such as U0140, U0155, or other U-codes
Your Straightforward BCM Installation Guide
Installing your new BCM is a manageable job for a DIYer or professional mechanic. For the Savana and Express vans, the BCM is typically located behind the center dash trim.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Access the Module: Carefully remove the center dash trim panels to expose the BCM. It’s usually a black box with several large electrical connectors.
- Disconnect and Remove: Unplug all electrical connectors from the old BCM. Note their orientation. Then, unbolt the module from its mounting bracket.
- Install the New BCM: Mount the new, pre-programmed BCM in the same location and securely reconnect all the electrical connectors.
- Power Up: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions—windows, locks, lights, etc.—to confirm the repair.
Important Post-Installation Notes
While this BCM is programmed for your VIN, some vehicle systems may require a ‘handshake’ with the new module. Please be aware of the following:
- Airbag System (SRS): If your airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional scan tool to sync the systems.
- Brake Pedal Position: In some cases, a brake pedal position sensor relearn may be required to ensure proper brake light and traction control operation.
- No Core Charge: You are not required to return your old module. There is no core charge or hassle involved.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified technician if you are unsure about any procedure.
Verified Vehicle Compatibility
This BCM is a direct replacement for a wide range of GM vehicles and part numbers. Please verify that your vehicle is on this list. This module is compatible with the original part number 20935349 and interchanges with the following part numbers:
10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084
ACADIA 07-12, 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 1500/2500/3500 VAN 08-12, G8 08-09, HUMMER H2 08-09, IMPALA 06-13, LUCERNE 06-11, MONTE CARLO 06-07, OUTLOOK 07-10, SAVANA 1500/2500/3500 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
What does a Body Control Module (BCM) do?
The BCM is a computer in your vehicle that controls body-related functions not managed by the engine computer. This includes power windows, locks, interior/exterior lights, the security system, wipers, and the horn.
Do I need to program this BCM at a dealership?
No. The main benefit of our service is that we program the BCM to your vehicle’s specific VIN before we ship it. This allows for a direct installation without needing a dealer’s expensive programming services.
Where is the BCM located on my 2010 Savana 2500 Van?
On most 2008-2012 Savana and Express vans, the BCM is located in the center of the dashboard, typically behind the radio or climate control area and accessible by removing the main dash bezel.
My original part number is different. Will this still work?
Yes, most likely. This BCM, part number 20935349, is a direct replacement for a long list of interchangeable GM part numbers. Please check the detailed fitment list above to ensure your original part number is included.
What happens if the airbag light comes on after I install it?
This can happen occasionally. It means the new BCM needs to be electronically introduced to the airbag system’s computer (SDM). A mechanic with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to sync them and turn off the light.
Is this a difficult part for a DIYer to replace?
For someone with basic mechanical skills and simple hand tools, this is a very manageable job. The most time-consuming part is carefully removing the dash trim to access the module. Since our module is pre-programmed, the electrical part of the job is just plug-and-play.