Restore Your Van’s Electrical Systems with a Plug-and-Play BCM

If you’re dealing with bizarre electrical issues in your 2008-2012 GMC Savana 3500, you’re not alone. As a technician with over two decades of experience, I’ve seen countless work vans sidelined by a failing Body Control Module (BCM). One minute the power locks work, the next they don’t. The security light might flash for no reason, or worse, the van refuses to start. These aren’t random gremlins; they’re classic signs that the central hub of your vehicle’s electronics is failing. This replacement BCM is the definitive, hassle-free solution.

The biggest headache with replacing a BCM has always been the expensive and time-consuming programming required at a dealership. We eliminate that step entirely. Simply provide us with your vehicle’s VIN during checkout, and our experts will program this module with the latest GM software specific to your Savana. It arrives at your door ready to install, saving you time, money, and a trip to the service center. This is the smart, efficient way to get your workhorse back on the road and earning its keep.

Is Your Savana Showing These Symptoms?

A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, a faulty BCM is the likely culprit:

• ✔ Power windows, door locks, or mirrors operating erratically or not at all.
• ✔ Interior or exterior lights flickering, staying on, or not turning on.
• ✔ The anti-theft or security light is illuminated, preventing the engine from starting.
• ✔ Gauges on the instrument cluster behaving strangely or not working.
• ✔ Communication error codes, such as U0100, U0140, or other U-series DTCs.
• ✔ Intermittent no-start or stalling conditions with no clear mechanical cause.
• ✔ The horn sounding unexpectedly or not working when pressed.

A Straightforward Guide to BCM Installation

For the 2008-2012 Savana 3500, the BCM is typically located in the center dash area. While the exact position can vary, this guide provides a general overview of the process for a confident DIYer.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning any electrical work.
2. Locate the BCM: On Savana and Express vans, you’ll usually find the BCM by removing the lower dash panels on the driver’s side or in the center console area. It’s a black plastic box with several large multi-pin connectors.
3. Disconnect and Remove: Carefully unplug all electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once all connectors are free, unbolt or unclip the module from its mounting bracket and remove it from the vehicle.
4. Install the New Module: Mount your new, pre-programmed BCM in the exact location of the old one. Securely reconnect all electrical connectors, ensuring each one clicks firmly into place.
5. Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting the engine) and test the functions controlled by the BCM: lights, locks, windows, etc.
6. Perform Relearns (If Needed): Start the vehicle. In some cases, a ‘Setup SDM Primary Key in BCM’ procedure is needed if the airbag light is on, or a ‘Brake Pedal Position Relearn’ may be required. These procedures often need a bi-directional scan tool.

Verified Vehicle Compatibility

This module is a direct replacement for part number 25847589 and is compatible with a wide range of GM vehicles. Please verify your original part number or consult the list below. This part fits the following makes and models with these options:

This module is also a direct replacement for 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