Restore Your Van’s Electrical Stability and Get Back on the Road
If your 2008-2012 Savana 3500 Van is plagued by baffling electrical problems—like flickering lights, malfunctioning power windows and locks, or a security system that has a mind of its own—you’re likely dealing with a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty BCM can turn a reliable workhorse into a source of constant frustration. This isn’t just an inconvenience; it can affect your vehicle’s security and safety systems.
This replacement Body Control Module is the definitive solution. It’s not just a part; it’s a fully prepared, plug-and-play fix. We handle the critical step of programming it to your vehicle’s specific VIN before it ships. This means you get a component loaded with the latest GM software, ready for installation right out of the box, saving you from a costly and time-consuming trip to the dealership for programming.
Case Study: A Tricky Diagnosis
I remember a 2011 Express van (which uses the same platform as the Savana) that came into my bay with a classic ‘no-crank, no-start’ issue. The owner had already replaced the battery and starter to no avail. The security light on the dash was flashing randomly. After hooking up my scan tool, I found a slew of ‘U’ codes, indicating a network communication failure. The culprit wasn’t the engine computer or a bad wire; it was the BCM creating electrical noise on the data bus, preventing the other modules from communicating properly. A new, correctly programmed BCM like this one had the van starting reliably in under an hour.
Is Your Van Showing These Symptoms?
A failing BCM is the central point of failure for many body-related functions. If you’re noticing any of these issues, this module is the likely solution:
- ✔ Erratic or non-functional interior and exterior lights
- ✔ Power windows, door locks, or mirrors working intermittently or not at all
- ✔ The security system light stays on, or the alarm goes off randomly
- ✔ Instrument cluster gauges behaving erratically or going dark
- ✔ The radio or climate controls are unresponsive
- ✔ Diagnostic trouble codes (DTCs) related to communication errors (e.g., U0140, U0155)
- ✔ A ‘Service Theft System’ message on the driver information center
A Straightforward Guide to Installation
For the confident DIYer or professional mechanic, installing this Savana 3500 Body Control Module is a manageable job. Since we program it beforehand, you skip the hardest part.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On the Savana and Express vans, the BCM is typically located in the center dash area, often accessible by removing lower dash panels.
- 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 the new BCM in place and securely reconnect all electrical connectors. Ensure they click into place.
- Reconnect Power: Re-attach the negative battery terminal.
- Perform Relearns (If Needed): Start the vehicle and check all functions. Refer to the post-installation procedures below, as some vehicles may require an airbag system sync or brake pedal position relearn.
Important Post-Installation Information
While this module is designed for a simple installation, modern vehicle systems sometimes require a final handshake. Be aware of these potential procedures:
- ✔ Airbag System Sync: If your airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is necessary. This requires a professional-grade scan tool to sync 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 proper operation of the brake lights and stability control systems.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified technician for your specific model.
Verified Vehicle Compatibility
This BCM, part number 15819552, is a direct replacement for a wide range of original part numbers and fits numerous GM vehicles. Please confirm your vehicle is on this list. 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
Do I need to have this BCM programmed by a dealer?
Do I need to have this BCM programmed by a dealer?
No. The main benefit of our service is that we program the module to your vehicle’s VIN before we ship it. It arrives ready to install, saving you hundreds in dealership fees.
What exactly does the Body Control Module do?
The BCM is a computer that acts as the central hub for your vehicle’s body electronics. It controls functions not related to the engine, such as power windows, locks, interior/exterior lighting, the security system, and climate controls.
Is there a core charge for this part?
Absolutely not. There is no core charge, and you do not need to send your old, faulty module back to us. You can keep it or dispose of it responsibly.
Where is the BCM located on my 2008-2012 Savana 3500 Van?
On most Savana and Express vans from this era, the BCM is found behind the dashboard, typically in the center stack area. Access usually requires removing the lower dash trim panels.
What if my airbag light is on after I install the new BCM?
This indicates the new BCM needs to be electronically synced with the vehicle’s Sensing and Diagnostic Module (SDM). This is a standard procedure called ‘Setup SDM Primary Key in BCM’ and requires a bi-directional scan tool to perform.