Restore Full Functionality to Your GM Vehicle
If your 2008-2012 Savana 3500 Van is plagued by baffling electrical issues—flickering lights, malfunctioning power windows, a security system that acts up, or even a no-start condition—a failing Body Control Module (BCM) is the likely culprit. As the central command center for your vehicle’s body electronics, the BCM’s health is critical for proper operation. When it fails, it can create a cascade of frustrating and unpredictable problems. This isn’t just an inconvenience; it can be a serious safety concern.
This replacement Savana 3500 Body Control Module is the definitive, hassle-free solution. We take the guesswork and high dealership costs out of the equation with our unique cloning service. Simply send us your original BCM, and we will transfer all the essential vehicle-specific data, including your VIN and security information, to this replacement unit. It arrives at your door, programmed with the latest GM software updates, ready for a straightforward installation. You get a reliable part that works seamlessly with your vehicle’s existing systems, without the need for an expensive trip to the dealer for programming.
A Technician’s Notebook: The Case of the Haunted Work Van
I had a 2011 Savana 3500 work van come into the shop that was driving the owner crazy. The complaint was intermittent: the dome lights would flicker, the radio would cut out, and sometimes the van wouldn’t start, showing a ‘Service Theft System’ message. The battery and alternator tested fine. Hooking up the scan tool, I found a slew of U-codes (U0140, U0155), indicating a loss of communication with the BCM. After checking the power and ground circuits to the BCM, it was clear the module itself was failing internally—a common issue I’ve seen in hundreds of these high-mileage workhorses due to heat cycles and vibration. Instead of a costly new module and programming from scratch, we used a cloned unit. The swap took less than an hour, and all the electrical gremlins were gone for good. It’s the most efficient repair for this exact problem.
Is Your Vehicle Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re noticing any of the following, it’s time to consider a replacement:
- ✔ Erratic interior or exterior lights (flickering, staying on, or not working at all).
- ✔ Power windows, locks, or mirrors behaving unpredictably.
- ✔ The security or anti-theft system preventing the vehicle from starting.
- ✔ Dashboard warning lights illuminating for no reason.
- ✔ Inconsistent or non-functional heating and A/C controls.
- ✔ Communication error codes, particularly U-codes (e.g., U0140), stored in the system.
- ✔ The horn sounding unexpectedly or not working.
A Straightforward Guide to BCM Installation
Our cloning service makes this repair accessible for both seasoned mechanics and skilled DIYers. While the exact location varies by model, the process is generally similar.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the BCM: On most Savana and Express vans, the BCM is located behind the center dash panel. You may need to remove trim pieces to access it.
- Disconnect and Remove: Carefully unplug all electrical connectors from the old BCM. Note their orientation. Then, unbolt the module from its mounting bracket.
- Install the New Module: Mount the replacement Savana 3500 Body Control Module in the same position and securely reconnect all electrical connectors.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Relearn Procedures: Start the vehicle and check all functions. As noted below, certain systems like the airbag or brake pedal position sensor may require a relearn procedure with a capable scan tool if a warning light is present.
Important Post-Installation Information
While our cloning process handles the critical programming, some vehicle systems may require recalibration after the BCM is replaced. This is a normal part of the process.
- Airbag System Sync: If the airbag light is on after installation, a professional scan tool must be used to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light operation and to satisfy the traction control system.
Disclaimer: Vehicle systems and procedures can vary. Always refer to a factory service manual or consult a qualified technician for your specific vehicle.
Guaranteed Vehicle Compatibility
This module is a direct replacement for part number 25847588 and is compatible with a wide range of GM vehicles. It also 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, 20935349, 22860591, 25826124, 25826125, 25847589, 25892622, 25910474, 25934762, 25934763, and 95151084. Please verify your part number and check the detailed fitment list below.
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 VAN 08-12
EXPRESS 2500 VAN 08-12
EXPRESS 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 VAN 08-12
SAVANA 2500 VAN 08-12
SAVANA 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 is the ‘Cloning Service’ and how does it work?
The cloning service is how we make this part plug-and-play. After your purchase, you’ll ship us your original, faulty BCM. Our technicians will extract the unique data from it and transfer it directly onto your replacement module. This ensures it communicates perfectly with your vehicle’s other computers, just like the original one did.
Do I need to provide my VIN?
Yes. While we clone the data from your old module, we also use your VIN to flash the replacement BCM with the latest, most stable software updates from GM. This provides optimal performance and reliability. Please provide your VIN during or after checkout.
What do I do with my old BCM?
You must send your original BCM to us for the cloning process. Once the service is complete, we will ship both your original module and the newly programmed replacement back to you. We do not keep your original part.
Will I need to take my van to a dealer after installation?
In most cases, no. Our cloning service is designed to eliminate the need for dealer programming. However, as mentioned in the post-installation notes, certain subsystems like the airbag (SRS) may require a ‘relearn’ procedure with a professional scan tool if a warning light appears.
Is this a difficult part to install myself?
For someone with moderate mechanical skill, it’s a very manageable job. The main challenge is typically accessing the module, which is often located behind dash panels. No special programming tools are required on your end, which is the biggest hurdle this service helps you overcome.