Tired of Unpredictable Electronics in Your Chevy Express Van?
If you’re dealing with a work van where the air conditioning cuts out on a hot day, the power locks have a mind of their own, or a mysterious warning light won’t go away, you’re likely facing a failing Body Control Module (BCM). The BCM is the central command for your vehicle’s body electronics, and when it starts to fail, it can cause a cascade of frustrating and seemingly unrelated problems. This replacement Body Control Module, compatible with part number 15137393, is the definitive solution for your 2004-2007 Chevrolet Express 1500 and a wide range of other GM vehicles. It arrives pre-programmed to your van’s specific VIN, eliminating the need for expensive dealership programming and making the repair straightforward for both professional technicians and DIYers.
From the Diagnostic Bay: The Case of the Commercial Van’s Gremlins
I once had a 2006 Express work van come into my shop that was driving the owner crazy. The complaint was intermittent: some days the radio and interior lights wouldn’t work, and other times the security light would flash, preventing the engine from starting—a disaster for a contractor on a schedule. He’d already replaced the battery and checked fuses. After hooking up my scan tool, I found a handful of communication loss DTCs pointing to the BCM. The internal circuitry was failing, causing unpredictable data corruption. We installed a VIN-programmed 2004-2007 Express 1500 BCM, and in less than 10 minutes, every single issue was resolved. The van started reliably, and all accessories functioned perfectly. It’s a prime example of how this single component can restore a vehicle’s core functionality and reliability.
Common Signs of a Failing BCM
- ✔ Intermittent or non-working power windows, door locks, or interior/exterior lights.
- ✔ HVAC system failures, such as the blower motor not working or temperature controls being unresponsive.
- ✔ An active airbag warning light, often accompanied by diagnostic trouble code (DTC) B1001.
- ✔ Security system malfunctions, including the vehicle refusing to start (Passlock issues).
- ✔ Unpredictable behavior from wipers, radio, or other electronic accessories.
- ✔ Communication errors with other modules on the vehicle’s data network.
Your 5-Minute BCM Installation Guide
Replacing the BCM in your Express van is a simple process that requires basic hand tools and can be completed quickly. This module is designed for a direct fit, getting you back to work with minimal downtime.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and allow the system to reset.
- Locate the Module: On the Express and Savana vans, the BCM is typically found in the center dash area. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed module in the same location. Reconnect all electrical connectors firmly until they click into place.
- Reconnect and Test: Reconnect the battery terminal. Start the vehicle and test all functions controlled by the BCM—lights, locks, windows, wipers, and HVAC—to confirm the repair was successful.
Important Post-Installation Note: In some cases, an airbag light may remain on. This requires a professional scan tool to perform the “Setup SDM Primary Key in BCM” procedure. Additionally, a Brake Pedal Position Relearn might be necessary on certain models. There is no core charge for this part, so you can keep your old module without any hassle.
Verified Vehicle Compatibility
This Body Control Module is a direct replacement for part number 15137393 and other interchangeable numbers. It provides a guaranteed fit for the following vehicles, specifically the 2004-2007 Express 1500 BCM with the commercial tradesman package (opt PRP).
EXPRESS 2500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
EXPRESS 3500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
SAVANA 1500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
SAVANA 2500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
SAVANA 3500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
AVALANCHE 1500/2500 03-06 Body Control (BCM); (under steering column)
SILVERADO & SIERRA 1500/2500/3500 03-07 (Classic) Body Control (BCM); (under steering column), Crew Cab
SUBURBAN & YUKON XL 1500/2500 03-06 Body Control (BCM); (under steering column)
TAHOE & YUKON 03-06 Body Control (BCM); (under steering column)
ESCALADE, ESV, EXT 03-06 Body Control (BCM); (under steering column)
HUMMER H2 03-07 Body Control (BCM); (LH dash)
Frequently Asked Questions
What does a Body Control Module (BCM) do on a Chevy Express?
The BCM acts as the central computer for your van’s comfort and convenience systems. It controls non-engine related functions like power windows, door locks, interior and exterior lighting, the security system, wipers, and the HVAC climate control system.
Will I need to get this BCM programmed by a dealer?
No. This module comes fully pre-programmed to your vehicle’s specific VIN. This makes it a true plug-and-play solution, saving you the time and high cost of dealership programming services.
What if the airbag light is on after I install the new BCM?
If the airbag warning light illuminates after installation, it means the new BCM needs to be synchronized with the airbag system’s SDM module. This requires a professional-grade scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. It’s a quick process for any well-equipped auto shop.
Is there a core charge or do I need to send my old part back?
There is absolutely no core charge. You can keep your original module without any extra fees or the hassle of returning a core.
Where is the BCM located on my 2005 Express 1500 van?
On the 2004-2007 Express and Savana vans, the Body Control Module is typically located behind the lower central part of the dashboard, often near the accelerator pedal assembly. Access usually involves removing a lower dash trim panel.