Fix Your Van’s Electrical Headaches for Good
If you’re dealing with unpredictable electrical problems in your 2004-2007 Chevrolet Express 2500 Van, you know how frustrating it can be. One moment the A/C works, the next it doesn’t. The power locks have a mind of their own, and a persistent airbag light might be on your dash. These aren’t separate issues; they’re classic signs of a failing Body Control Module (BCM). This VIN-programmed BCM, part number 15137395, is the direct-fit, reliable solution to restore full functionality and peace of mind to your workhorse van.
From the Diagnostic Bay: The Case of the Haunted Work Van
A local contractor brought his 2006 Express 2500 into my shop, completely fed up. His van, the lifeblood of his business, was acting possessed. The radio would cut out, the dome light would flicker, and worst of all, the security system would randomly engage, causing no-start situations that made him late for jobs. He’d already replaced the battery and checked the grounds. After connecting my scanner, I saw a handful of communication loss codes (U-codes) pointing to the BCM. A failing BCM can cause a cascade of bizarre, unrelated symptoms because it’s the central hub for all body electronics. We installed a VIN-programmed module, and in under an hour, every single issue was gone. This isn’t just a part; it’s the fix that gets you back on the road reliably.
Is Your Express Van Showing These Electrical Gremlins?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s highly likely your BCM is the culprit. This replacement 2004-2007 Express 2500 BCM is designed to resolve these exact problems:
- âś” Intermittent or non-functional HVAC controls, including a blower motor that won’t turn on.
- âś” An illuminated airbag warning light, often accompanied by diagnostic trouble code (DTC) B1001.
- âś” Power windows, door locks, or exterior lights that work sporadically or not at all.
- âś” Malfunctioning security system, leading to unexpected alarms or a vehicle that won’t start.
- âś” Strange grounding issues or a cluster of seemingly unrelated electrical failures.
Your 5-Minute BCM Installation Guide
Getting your van back in working order is a straightforward process that you can do yourself, saving time and money. No need for a trip to the dealership for programming.
- Safety First: Before you begin, disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the BCM: On the Express and Savana vans, the BCM is typically found in the center of the dashboard, often accessible from below or by removing a lower dash panel.
- Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have release tabs that need to be pressed. Remove any mounting screws or clips holding the old module in place, then install the new one.
- Reconnect and Test: Securely plug the connectors into your new BCM. Reconnect the battery terminal. Start the vehicle and test all functions—lights, wipers, locks, windows, and HVAC—to confirm the repair.
Post-Installation Note: In some cases, special procedures may be needed. If the airbag light remains on, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ function. Similarly, a brake pedal position relearn might be necessary for certain models. Our team is here to support you if you have questions.
Verified Fitment for Your GM Vehicle
This module is a direct replacement for part number 15137395 and other interchangeable numbers. While it is the correct part for a 2004-2007 Express 2500 BCM with the commercial tradesman package (opt PRP), it also fits a wide range of other GM trucks and SUVs. Please verify your part number and vehicle options before ordering.
- Chevrolet Express / GMC Savana 1500/2500/3500 Van (2004-2007): Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
- Chevrolet Silverado / GMC Sierra Trucks (2003-2007 Classic): Body Control (BCM); (under steering column), specific options apply (e.g., Crew Cab)
- Chevrolet Avalanche, Suburban, Tahoe / 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
Is this BCM truly plug-and-play?
Yes. We program the module to your vehicle’s VIN before shipping. This ensures it communicates correctly with your van’s other systems right out of the box, eliminating the need for expensive dealership programming.
Where is the BCM located on my 2005 Express 2500 Van?
On the 2004-2007 Express and Savana vans, the BCM is located behind the center of the dashboard. You can typically access it by removing the lower dash trim panel below the radio and HVAC controls.
Why is my airbag light still on after installing the new BCM?
This can happen because the new BCM needs to be electronically ‘shaken hands’ with the airbag’s computer (SDM). A procedure called ‘Setup SDM Primary Key in BCM’ must be performed with a bi-directional scan tool to sync the modules and turn off the light.
Do I need to send my old BCM back?
No. There is no core charge for this part. You can keep your old module, which saves you the time and hassle of return shipping.
Will this part fit other GM trucks like a Silverado?
Yes, this BCM is compatible with a wide range of GM trucks and SUVs from that era, including the Silverado, Sierra, Tahoe, and Suburban. Always check the fitment list and match your original part number to ensure compatibility.