Is Your Savana 3500 Acting Possessed?
As a tech with over 20 years on the floor, I’ve seen it all. A work van like your 2008-2012 Savana 3500 is your livelihood. When the electronics go haywire—power locks firing randomly, the security light keeping the engine from starting, or the interior lights refusing to turn off—you’re not just inconvenienced, you’re losing money. These aren’t random glitches; they’re classic signs of a failing Body Control Module (BCM), the central hub for your van’s body electronics.
Real-World Diagnosis: A Savana Story
“A customer’s 2011 Savana 3500 came in last week with these exact symptoms. The driver said his battery was dead every morning. We checked for a parasitic draw and found a significant one, but it was intermittent. After tracing the circuits, we found the BCM was keeping the radio and interior light relays energized long after the van was shut off. Swapping in a new, correctly programmed BCM didn’t just fix the draw; it also solved a power window issue the owner thought was a separate problem. This single module was causing multiple headaches.”
The Direct Solution: A VIN-Programmed BCM
Don’t let a faulty module sideline your workhorse. This Body Control Module, part number 25847589, is the definitive solution. We take the guesswork and dealer hassle out of the equation. Simply provide us with your Savana 3500’s VIN during checkout, and our experts will program the module with the latest official GM software specific to your vehicle’s configuration. It arrives at your door ready for installation.
Common Symptoms of a Failing BCM:
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights staying on or not working at all.
- ✔ Flashing security light and a no-start or intermittent start condition.
- ✔ False warnings on the instrument cluster (e.g., ‘Service Theft System’).
- ✔ Radio or climate control systems behaving unpredictably.
- ✔ Communication errors with other vehicle modules (DTC U-codes).
Easy Installation for Your 2008-2012 Savana 3500 BCM
Replacing the BCM on your Savana is a straightforward job that you can do with basic tools, saving you hundreds in labor costs. The BCM is typically located in the center dash area.
- Safety First: Always disconnect the negative battery terminal before starting any electrical work.
- Access the Module: Remove the necessary dash trim panels to gain access to the BCM. On most Savana and Express vans, this is behind the center console or glove box area.
- Swap the Connectors: Carefully disconnect the electrical connectors from the old module. Note their orientation.
- Install the New BCM: Mount the new module in the same location and securely plug in all the connectors.
- Reconnect Power: Re-assemble your dash panels and reconnect the negative battery terminal.
Important Post-Installation Steps
This is a critical step for safety and proper function. After installing your new BCM, certain systems need to be re-initialized. While our programming handles the core functions, the BCM needs to ‘handshake’ with other modules in your van.
- Airbag System Reset: The ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional-grade scan tool. This ensures the Supplemental Restraint System (SRS) or airbag system is fully operational and extinguishes the airbag warning light.
- Brake Pedal Position Sensor Relearn: Some vehicles require a recalibration of the brake pedal position sensor. This is essential for proper brake light operation and stability control system function.
Note: If you are not equipped to perform these procedures, a qualified local mechanic can complete them for you.
Guaranteed Fitment & Interchangeability
This module is a direct replacement for part number 25847589 and is also compatible 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, 20935349, 22860591, 25826124, 25826125, 25847588, 25892622, 25910474, 25934762, 25934763, 95151084
This BCM fits a wide range of GM vehicles, including many Acadia, Enclave, Traverse, Equinox, Tahoe, Yukon, Express, Impala, and Cadillac models. Please verify your original part number to ensure compatibility.