Restore Your Van’s Electrical Functions with a Reliable Solution
If you’re dealing with bizarre electrical issues in your 2008-2012 GMC Savana 2500 Van—like flickering lights, malfunctioning power windows, or a security system that acts up—you’re not alone. These are classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating problems that can take your workhorse off the road. In my 20+ years as a technician, I’ve seen how a bad BCM can mimic a dozen other issues, leading to wasted time and money on incorrect diagnoses.
This is your direct-fit, hassle-free solution. We offer a genuine OEM Body Control Module that comes pre-programmed to your van’s specific Vehicle Identification Number (VIN). This means you can skip the expensive trip to the dealership for programming. Simply provide us with your VIN after purchase, and we’ll handle the software flashing with the latest GM updates before it even ships. This ensures seamless integration and restores your van’s factory functions.
Common Signs of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security system or keyless entry failing to operate correctly.
- ✔ Instrument cluster gauges behaving erratically or going dark.
- ✔ Unexplained battery drain that leaves you with a dead battery overnight.
- ✔ Diagnostic trouble codes such as U0140 (Lost Communication With Body Control Module).
A Technician’s Notebook
I remember a fleet customer with a 2011 Savana 2500 that was driving his drivers crazy. The dome lights would randomly stay on, draining the battery, and the power locks only worked half the time. They had already replaced the battery twice. After a quick scan, I saw communication faults pointing towards the BCM. Instead of a lengthy and expensive diagnostic process at the dealer, we installed one of our VIN-programmed modules. The swap took less than an hour, and all the electrical gremlins were gone instantly. The van was back in service the same day, saving the business from costly downtime.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On most Savana and Express vans, the BCM is located behind the center dash panel. You may need to remove some trim pieces 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.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely reconnect all the electrical connectors, ensuring they click into place.
- ✔ Reconnect Power: Reattach the negative battery terminal.
- ✔ Perform Final Checks: Start the vehicle and test all related functions: lights, locks, windows, horn, and wipers. Note that some post-install procedures may be necessary.
Important Post-Installation Note: While this module is programmed for your VIN, some vehicles require additional security or system handshakes after installation. For instance, if your airbag light is on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. Similarly, a ‘Brake Pedal Position Relearn’ might be required. Always consult a service manual or a qualified mechanic if you encounter these issues.
Will This Fit My Vehicle?
This Body Control Module is a direct replacement for part number 20815898 and a wide range of other interchangeable part numbers. It is guaranteed to fit the 2008-2012 GMC Savana 2500 Van. It also fits a broad selection of other GM vehicles, including:
- Acadia (2007-2012)
- Avalanche 1500 (2010)
- Caprice (2011-2013)
- Captiva Sport (2012)
- CTS (2008-2013)
- DTS (2006-2011)
- Enclave (2008-2012)
- Equinox (2007-2009)
- Escalade, ESV, EXT (2010)
- Express 1500/2500/3500 Vans (2008-2012)
- G8 (2008-2009)
- Hummer H2 (2008-2009)
- Impala (2006-2013)
- Lucerne (2006-2011)
- Monte Carlo (2006-2007)
- Outlook (2007-2010)
- Savana 1500/3500 Vans (2008-2012)
- SRX (2007-2009)
- STS (2010)
- Suburban 1500 (2010)
- Tahoe (2010)
- Torrent (2007-2009)
- Traverse (2009-2012)
- Vue (2008-2010)
- Yukon & Yukon XL 1500 (2010)
Please verify your part number or consult the detailed fitment list to ensure compatibility.
Frequently Asked Questions
Frequently Asked Questions
Do I need to send my old BCM back?
No, there is absolutely no core charge. You can keep your original part.
Is this part difficult to install myself?
For someone with basic mechanical skills, the physical installation is straightforward. The BCM is typically accessible behind the dash. The main benefit here is that the difficult software programming is already done for you.
What information do you need to program the module?
After you place your order, we will need the 17-digit Vehicle Identification Number (VIN) from your vehicle. This ensures we load the correct software and vehicle-specific options.
What if my airbag light is on after installation?
This is a known possibility. The new BCM may need to be electronically introduced to the airbag system (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure with a high-end diagnostic scan tool.
Will this fix my specific problem?
This part corrects issues directly caused by a failing BCM. While the symptoms listed are common, it’s always best to have a proper diagnosis performed to confirm the BCM is the root cause before ordering.