Is Your GMC Savana 3500 Plagued by Bizarre Electrical Problems?
If you’re dealing with flickering lights, unresponsive power windows or locks, or an HVAC system with a mind of its own, a failing Body Control Module (BCM) is the likely culprit. The BCM is the central command for your van’s body electronics, and when it fails, it can cause a cascade of frustrating and difficult-to-diagnose issues. This genuine OEM-quality module is the definitive solution to restore full functionality and reliability to your workhorse van.
From the Diagnostic Bay
We had a 2006 Savana 3500 work van come into the shop that was driving the owner crazy. The radio would turn on and off, the dome light wouldn’t work, and the power locks were intermittent. He’d replaced fuses and relays with no luck. After hooking up our scanner, we saw multiple communication loss codes pointing to a central failure. We identified the BCM as the weak link. After installing a VIN-programmed unit like this one, every single electrical gremlin vanished. It’s a common failure point on these vans, but thankfully, it’s a straightforward fix.
Diagnosing a Faulty Savana 3500 Body Control Module
A failing BCM can manifest in numerous ways, often mimicking other component failures. If your van is exhibiting several of the following symptoms, it’s time to inspect your BCM.
- ✔ Unpredictable power door lock or window operation.
- ✔ Interior or exterior lights that don’t work correctly or stay on.
- ✔ HVAC fan or climate controls functioning erratically or not at all.
- ✔ An active airbag warning light, potentially with a B1001 diagnostic trouble code.
- ✔ Security system malfunctions, leading to a no-start condition.
- ✔ Communication errors with other vehicle modules.
Plug-and-Play Solution, No Dealership Required
The biggest hurdle in replacing a BCM is typically the need for expensive dealership programming. We eliminate that step. This module is expertly programmed to your van’s specific Vehicle Identification Number (VIN) before it ships. This ensures that it communicates perfectly with your vehicle’s existing systems right out of the box. Installation is simple, with the module located in the center dash area on Savana vans. Just disconnect the battery, swap the modules, and reconnect. There is no core charge, so you can keep your old part without any hassle.
Frequently Asked Questions
What exactly does the Body Control Module do on my Savana 3500?
The BCM acts as the central computer for your van’s body electronics. It controls non-engine related functions like your lights, power windows and locks, wipers, security system, and HVAC controls.
Is this module ready to install when I receive it?
Yes. We pre-program the module to your vehicle’s VIN before shipping, making it a true plug-and-play part. No additional programming is required for standard operation.
Where is the BCM located on a 2004-2007 Savana Van?
On the Savana and Express vans, the Body Control Module is typically found behind the center dash panel.
My airbag light is on after installing the new BCM. What should I do?
This can happen occasionally. You will need a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the airbag system with the new BCM and clear the light.
Do I need to return my old BCM?
No. This part has no core charge, so you are not required to send your original module back to us.