Tired of Unpredictable Electrical Problems in Your GM Van?
If you’re a professional running a fleet or a DIYer trying to keep your workhorse on the road, few things are more frustrating than chasing electrical gremlins. One minute the A/C works, the next it doesn’t. The power locks have a mind of their own, or worse, the van won’t start. These aren’t random issues; they often point directly to a failing Body Control Module (BCM). This VIN-programmed BCM, a direct replacement for part number 15137394, is the definitive solution for your 2004-2007 Express 3500 Van BCM and other compatible GM vehicles. It arrives ready to install, restoring the critical functions you depend on every day.
A Technician’s Notebook: The Case of the Intermittent No-Start
I had a 2006 Savana 3500 from a local plumber’s fleet towed to my shop. The complaint was intermittent no-start and the security light flashing randomly. The driver was losing time and money. My initial scan showed a slew of communication codes, including the notorious B1001. After checking the main grounds and power feeds to the BCM—which were solid—I knew where to look. In these work vans, the BCM, located in the center dash, endures constant heat cycles and vibration. Over 15+ years, the internal solder joints and components simply fatigue. Swapping in a VIN-programmed BCM didn’t just fix the no-start; it also resolved a flickering dome light the owner hadn’t even mentioned. It’s a classic failure I’ve seen hundreds of times.
Is Your Van Showing These Telltale Signs of BCM Failure?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Unresponsive or erratic HVAC controls, including a blower motor that won’t turn on or off.
- ✔ The dreaded airbag warning light is illuminated, often with a DTC like B1001 stored in the system.
- ✔ Power accessories failing intermittently, such as windows that won’t go up or down, door locks that don’t respond, or exterior lights that flicker.
- ✔ Security system acting up, causing the anti-theft light to flash and preventing the engine from starting.
- ✔ A collection of seemingly unrelated diagnostic trouble codes (DTCs) related to body systems.
A Straightforward Guide to Your BCM Installation
Getting your van back to 100% is easier than you think. For the Express and Savana vans, this is a quick job that requires basic tools and less than 10 minutes of your time.
- Safety First: Always begin by disconnecting the negative terminal from your vehicle’s battery. This prevents electrical shorts and helps reset the vehicle’s electronic systems.
- Locate the Module: In your 2004-2007 Express or Savana Van, the BCM is conveniently located behind an access panel in the center of the dashboard, below the radio and HVAC controls.
- Swap the BCM: Carefully unplug the electrical connectors from the old BCM. They have locking tabs, so be gentle. Remove any mounting screws or clips holding it in place, then swap in your new module.
- Reconnect and Test: Secure the new BCM, plug in the connectors until they click, and reattach your battery terminal. Start the vehicle and test all functions—lights, locks, windows, wipers, and HVAC—to confirm the repair.
Post-Installation Note: In some cases, particularly if the airbag light was on, a ‘Setup SDM Primary Key in BCM’ procedure may be needed using a professional scan tool. This re-syncs the security communication between the BCM and the airbag module. Additionally, a Brake Pedal Position Relearn might be required on some models. And the best part? There is no core charge. You can keep your old part without any hassle.
Guaranteed Fitment for Your GM Truck or Van
This module is engineered to OEM specifications for a perfect fit and function in a wide range of General Motors vehicles. While this is the correct 2004-2007 Express 3500 Van BCM, it also fits many others. Please verify your part number or consult our full list below. It is a direct replacement for part numbers 15116066, 15137394, 15198116, and others.
Key Compatible Models Include:
- Chevrolet Express 1500/2500/3500 Vans (2004-2007)
- GMC Savana 1500/2500/3500 Vans (2004-2007)
- Chevrolet Silverado & GMC Sierra 1500/2500/3500 (2003-2007 Classic)
- Chevrolet Tahoe, Suburban & GMC Yukon/Yukon XL (2003-2006)
- Cadillac Escalade, ESV, EXT (2003-2006)
- Hummer H2 (2003-2007)
Frequently Asked Questions
Do I need to take my van to the dealer for programming?
No. This Body Control Module comes pre-programmed to your vehicle’s specific VIN. This eliminates the need for expensive dealership programming, making it a true plug-and-play solution.
What tools do I need for installation?
For most applications, especially the Express and Savana vans, you’ll only need basic hand tools like a socket or screwdriver to remove the dash trim panel. No specialized electronic tools are required for the physical installation.
My airbag light is on. Will this fix it?
If the airbag light is caused by a faulty BCM (like with code B1001), this part will resolve the root cause. However, after installation, you may need a technician with a capable scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to clear the light.
Is this part number 15137394 the same as 15116066?
Yes, this module is a direct replacement and is interchangeable with a long list of GM part numbers, including 15137394, 15116066, 15136225, 15198116, and more. It is functionally identical and programmed to work with your vehicle’s options.