Tired of Electrical Gremlins in Your Express Van?
If you’re dealing with flickering lights, a dead instrument cluster, or power windows with a mind of their own, you’re not alone. The Body Control Module, or BCM, is the electronic brain for your vehicle’s comfort and security features. When it starts to fail in a workhorse like the 2004-2007 Express 3500, it can bring your operations to a halt. This isn’t just an inconvenience; it’s a reliability issue that can cost you time and money. This direct-fit, VIN-programmed Body Control Module, compatible with part number 15137395, is the definitive solution to restore order and get your van back to being the reliable tool you depend on.
Case Study: A Tricky Diagnosis
A customer brought in his 2006 Express 3500 cargo van last month with a truly bizarre set of symptoms. The radio would turn on and off randomly, the dome light wouldn’t work, and the security light was flashing, causing an intermittent no-start condition. He had already replaced the battery and checked the main fuses. After hooking up my pro-level scanner, I saw a handful of communication loss codes (U-codes) pointing to the BCM. In my 20+ years of experience, these GM vans often suffer from BCM failure due to voltage spikes or internal circuit board corrosion. We installed a VIN-programmed module, and within minutes, all the phantom electrical issues were gone. It’s a common failure point, but thankfully, it’s an easy fix with the right part.
Is Your Express Van Showing These Electrical Gremlins?
- ✔ Power door locks or windows operating intermittently or not at all.
- ✔ HVAC blower motor or climate controls failing to respond.
- ✔ An active airbag warning light, often with a B1001 diagnostic trouble code.
- ✔ The security system preventing the engine from starting.
- ✔ Erratic behavior from interior or exterior lights.
- ✔ A cluster of seemingly unrelated electrical DTCs stored in the system.
Get Your Van Back to Work: A 5-Minute Installation Guide
One of the best features of this module is its simple, plug-and-play installation. Because we program it to your van’s VIN before shipping, you can skip the expensive trip to the dealership. For the 2004-2007 Express 3500, the BCM is typically located in the center of the dash, often accessible by removing a lower trim panel.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and to help reset the system.
- Locate the Old BCM: Find the module in the center dash area. It will have several multi-pin electrical connectors attached to it.
- Swap the Module: Carefully unplug the connectors from the old BCM. Unbolt or unclip the module from its mounting bracket and set it aside. There’s no core charge, so you don’t need to send it back!
- Install the New BCM: Mount the new module and securely plug in all the electrical connectors. You’ll hear them click into place.
- Reconnect and Test: Reconnect the battery terminal. Start your van and test all the functions—lights, locks, windows, wipers, and HVAC—to confirm the repair.
Important Post-Installation Steps
After installing your new 2004-2007 Express 3500 BCM, a couple of final procedures may be necessary to ensure full system integration. If your airbag light is on, a technician will need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a compatible scan tool. Some vehicles may also require a brake pedal position sensor recalibration. These steps ensure all safety systems are communicating correctly with the new module.
Verified Compatibility for Your GM Vehicle
This BCM is a direct replacement for part number 15137395 and other interchangeable numbers, ensuring a perfect fit for a wide range of GM trucks and vans. Please verify your vehicle’s specific options below.
- Chevrolet Express 3500 Van (2004-2007): Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
- Chevrolet Express 1500/2500 Van (2004-2007): Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
- GMC Savana 1500/2500/3500 Van (2004-2007): Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
- Chevrolet Silverado & GMC Sierra Pickups (2003-2007 Classic): Body Control (BCM); (under steering column), various cab/trans options
- Chevrolet Avalanche, Suburban, Tahoe (2003-2006): Body Control (BCM); (under steering column)
- GMC Yukon & Yukon XL (2003-2006): Body Control (BCM); (under steering column)
- Cadillac Escalade, ESV, EXT (2003-2006): Body Control (BCM); (under steering column)
- Hummer H2 (2003-2007): Body Control (BCM); (LH dash)
Frequently Asked Questions
What does a Body Control Module do on a Chevy Express?
The BCM acts as a central computer for your van’s body-related electronics. It controls non-engine functions like power windows, door locks, the security system, interior and exterior lighting, wipers, and the HVAC system.
Do I need to program this BCM?
No. We handle the programming for you. Simply provide your vehicle’s VIN during checkout, and we will program the module so it’s ready for immediate installation, saving you a trip to the dealer.
Why is my airbag light still on after installing the new module?
This is a normal security measure. The new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). A repair shop with a professional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to turn off the light.
Where is the BCM located on a 2006 Express 3500?
On Express and Savana vans with the commercial tradesman package, the BCM is typically found behind a panel in the center of the dashboard, below the radio and HVAC controls.
Is this part compatible with other part numbers?
Yes, this module is a direct replacement for several part numbers, including 15116066, 15137395, 15198116, and others. It is designed to function identically to the original equipment.
What tools do I need for this installation?
For most installations, you will only need basic hand tools to remove a dash trim panel (like a panel popper or a screwdriver) and a wrench to disconnect the battery terminal (commonly 8mm or 10mm).