Restore Order to Your Van’s Electrical System
If you’re dealing with flickering lights, malfunctioning power windows, a dead battery overnight, or random warning messages on the dash of your 2008-2012 Savana 1500 Van, the Body Control Module (BCM) is often the culprit. As the central nervous system for your vehicle’s electronics, a failing BCM can cause a host of frustrating, intermittent issues that are difficult to diagnose. This isn’t just an annoyance; it can affect the reliability and safety of your work van or passenger vehicle. This replacement Body Control Module, part number 20921436, is the reliable, cost-effective solution to get your van back in perfect working order.
Case Study: A Tricky Diagnosis
I had a 2011 Savana 2500 work van come into my shop that was driving the owner crazy. The battery would die randomly, the radio would shut off, and sometimes the power door locks wouldn’t respond. The owner had already replaced the battery and alternator. After connecting my scan tool, I found several ‘U’ codes, specifically a U0140, indicating a loss of communication with the BCM. We checked the main power and ground connections to the module, which were solid. This pointed directly to an internal failure in the original BCM. We installed one of these pre-programmed modules, and all the electrical gremlins disappeared instantly. It’s a common failure point I’ve seen on hundreds of these GM vans and SUVs.
Is Your Savana Van Showing These Symptoms?
A failing BCM doesn’t always trigger a check engine light, making it tricky to pinpoint. Here are the most common signs that your 2008-2012 Savana 1500 BCM may need replacement:
- ✔ Erratic power windows, door locks, or interior/exterior lights.
- ✔ Horn honking randomly or not working at all.
- ✔ Security system issues, including a no-start condition where the security light is flashing.
- ✔ Inaccurate gauge readings on the instrument cluster.
- ✔ Communication error codes (U-codes) stored in the system, such as U0140.
- ✔ Unexplained parasitic battery drain that kills your battery overnight.
A Straightforward Guide to BCM Replacement
Replacing the BCM on your Savana van is a manageable job for a DIYer with basic tools. Because we program the module to your VIN before shipping, you can avoid a costly trip to the dealership. Here’s a general guide:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electrical components.
- Locate the BCM: On the Savana and Express vans, the BCM is typically located in the center dash area, often accessible by removing a lower dash panel or the glove box.
- Disconnect and Remove: Carefully unplug the electrical connectors. These usually have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical connectors. Ensure they click into place.
- Reconnect Battery & Test: Reconnect the negative battery terminal. Start the vehicle and test all the body functions: lights, locks, windows, radio, etc., to confirm the repair.
Important Post-Installation Information
While this module is programmed for a direct fit, some GM vehicles require a final handshake between modules. You may need a professional scan tool for these final steps:
- Airbag System Sync: If your airbag light is on after installation, a procedure called “Setup SDM Primary Key in BCM” is needed to sync the modules.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn might 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 fee associated with this purchase.
Guaranteed Fitment for Your GM Vehicle
This BCM is a direct replacement for a wide range of GM trucks, vans, and SUVs. It replaces numerous part numbers, ensuring broad compatibility. Please verify your vehicle is on this list:
AVALANCHE 1500: 2010 (ID 25892622)
CAPRICE: 2011-2013
CAPTIVA SPORT: 2012
CTS: 2008-2013
DTS: 2006-2011
ENCLAVE: 2008-2012
EQUINOX: 2007-2009
ESCALADE / ESV / EXT: 2010 (ID 20815898 or 25892622)
EXPRESS 1500 VAN: 2008-2012
EXPRESS 2500/3500 VAN: 2008-2012
G8: 2008-2009
HUMMER H2: 2008-2009
IMPALA: 2006-2013
LUCERNE: 2006-2011
MONTE CARLO: 2006-2007
OUTLOOK: 2007-2010
SAVANA 1500 VAN: 2008-2012
SAVANA 2500/3500 VAN: 2008-2012
SRX: 2007-2009
STS: 2010
SUBURBAN 1500: 2010 (ID 20815898 or 25892622)
TAHOE: 2010 (ID 20815898 or 25892622)
TORRENT: 2007-2009
TRAVERSE: 2009-2012
VUE: 2008-2010
YUKON / YUKON XL 1500: 2010 (ID 20815898 or 25892622)
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
Frequently Asked Questions
Frequently Asked Questions
What does ‘programmed to my VIN’ actually mean?
It means we load the latest GM-certified software onto the module that is specific to your vehicle’s exact features and options, using the Vehicle Identification Number (VIN) you provide. This ensures the BCM works correctly with your van’s systems right out of the box, saving you from expensive dealership programming.
Do I need any special tools for the installation?
For the physical installation, you’ll only need basic hand tools like a socket set and screwdrivers. However, as noted, some vehicles may require a professional-grade scan tool to perform a final Airbag System Sync or Brake Pedal Position Relearn after the module is installed.
Will this fix my ‘Service StabiliTrak’ warning light?
A failing BCM can sometimes cause StabiliTrak or ABS warnings due to communication errors. While this module can resolve the issue if the BCM is the root cause, these warnings can also be triggered by other components like wheel speed sensors. A proper diagnosis is always recommended.
Is this a used part?
This is a high-quality, inspected, and tested component that is guaranteed to function correctly. We load it with fresh, vehicle-specific software to ensure reliability and performance that meets or exceeds the original part.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module or dispose of it responsibly.