Restore Your Van’s Electrical System with a Pre-Programmed BCM
Are you tired of chasing electrical gremlins in your GM van or truck? Intermittent power windows, flickering dashboard lights, a security system that acts up, or even a no-start condition can often be traced back to one component: a failing Body Control Module (BCM). As a technician with over 20 years of experience, I’ve seen how a faulty BCM can cause some of the most frustrating and difficult-to-diagnose issues. It’s the central hub for your vehicle’s body electronics, and when it fails, chaos ensues. This replacement 2003-2007 Savana 3500 BCM is the definitive solution, arriving at your door fully programmed and ready for installation.
A few months back, a 2006 Express 3500 work van came into my shop. The owner was at his wit’s end. Some days the interior lights wouldn’t turn off, draining the battery. Other days, the power locks would cycle on their own while driving. He’d replaced the battery and checked fuses, but the problems were random. After hooking up my scan tool, I noticed communication errors with multiple modules, all pointing back to the BCM. We swapped in one of our pre-programmed BCMs, and in under an hour, every single ghost in that machine was gone. It’s a classic failure mode for these hardworking vehicles, and a direct-fit, programmed module is the fastest path back to reliability.
Common Signs of a Failing BCM
If your vehicle is experiencing any of the following, a faulty BCM is the likely culprit. This module directly addresses these common failure points.
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Dashboard lights flickering, dimming, or staying on unexpectedly.
- ✔ The security system or alarm engaging randomly or preventing the engine from starting (Passlock issues).
- ✔ Horn honking without reason or not working at all.
- ✔ Inconsistent interior or exterior lighting behavior.
- ✔ Communication error codes (U-codes) when scanned with a diagnostic tool.
A Straightforward Guide to Your BCM Installation
Installing your new BCM is a manageable job for a DIY enthusiast. For the Savana and Express vans, the BCM is typically located in the center dash area. For Silverado and Sierra pickups, it’s usually found under the steering column. Always confirm the location for your specific model.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Access the Module: Carefully remove any dash panels or trim necessary to gain access to the old BCM. This usually involves a few screws or clips.
- Disconnect and Remove: Unplug the electrical connectors from the old BCM. They have release tabs that need to be pressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and reconnect all the electrical harnesses. Ensure they click securely into place.
- Reassemble and Reconnect: Put the dash panels back in place and reconnect the negative battery terminal.
- Test Functionality: Start the vehicle and test all body functions—lights, locks, windows, radio, etc.—to confirm the repair.
Important Post-Installation Information
Because this 2003-2007 Savana 3500 BCM is pre-programmed to your VIN, most functions will work immediately. However, depending on your vehicle’s specific configuration, a couple of simple relearn procedures may be needed:
- Airbag System Sync: If, and only if, the airbag warning light is on after installation, a professional scan tool is needed 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, the brake pedal position sensor may need to be recalibrated to ensure proper operation of the brake lights and stability control systems.
Will This Fit My Truck or Van?
We guarantee compatibility with vehicles requiring the following part numbers. This module is a direct replacement for part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. It fits a wide range of GM models, including:
SAVANA 1500/2500/3500 VAN (2003-2007)
SILVERADO 1500/2500/3500 PICKUP (2003-2007 Classic Body Style)
SIERRA 1500/2500/3500 PICKUP (2003-2007 Classic Body Style)
SSR (2003-2006)
Note: Please check the original description for specific options and exclusions (e.g., Crew Cab, commercial packages).
Frequently Asked Questions
How does the VIN programming work?
After you place your order, simply provide us with your vehicle’s 17-digit VIN. We use official GM software to load the correct calibration file for your specific vehicle onto the BCM. This ensures it works correctly with the options your truck or van was built with.
Is this really plug-and-play?
Yes, for over 95% of installations. Our VIN programming handles the critical setup. In rare cases, as mentioned above, a simple relearn for the airbag or brake sensor may be needed, which is a common step with many module replacements.
What if my original part number is not on your list?
Please contact us with your VIN and original part number before ordering. We can verify compatibility to ensure you get the correct part for your vehicle.
Do I have to send my old BCM back?
No. This purchase requires no core charge. You can keep your old part, which is great if you want to hold onto it for any reason.
Will this fix my ‘Service 4WD’ message?
While the BCM communicates with many systems, a ‘Service 4WD’ message is more commonly related to the Transfer Case Control Module (TCCM) or a sensor/actuator in the 4WD system. It’s best to get a proper diagnosis before replacing the BCM for that specific issue.