Fix Your Van’s Electrical Issues for Good
If the electronics in your 2004-2007 Chevrolet Express 1500 Van are acting possessed, you’re not alone. One moment the air conditioning works, the next it’s dead. The power locks have a mind of their own, and a random airbag light on the dash is causing you headaches. These aren’t separate problems; they’re classic symptoms of a failing Body Control Module (BCM). This module is the electronic nerve center for your van’s comfort and convenience features. When it fails, it can make your reliable workhorse feel unpredictable. This replacement BCM, part number 15137395, is the definitive solution, arriving pre-programmed specifically to your van’s VIN for a true plug-and-play fix.
A Technician’s Notebook: The Commercial Van Conundrum
I had a 2006 Express 1500 work van come into my bay last month that was driving the owner crazy. The complaint was ‘the blower motor only works on high, and sometimes not at all.’ The driver also mentioned the dome light would flicker occasionally. He had already replaced the blower motor and the resistor, but the problem persisted. After hooking up my scanner, I saw a handful of communication codes and a specific BCM internal fault. These GM vans, especially the commercial models, put a lot of demand on their BCMs. We swapped in a VIN-programmed module, and within 10 minutes, the HVAC controls worked perfectly on all speeds and the flickering light was gone. It’s a common failure, and a pre-programmed module is the fastest way to get these vans back on the road making money.
Is Your Express Van Showing These Electrical Gremlins?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely culprit for your 2004-2007 Express 1500 BCM issues:
- ✔ Intermittent or non-functional HVAC controls and blower fan operation.
- ✔ An active airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Power windows, door locks, or exterior lights that work sporadically or not at all.
- ✔ The security system acting up, leading to a frustrating no-start or crank-no-start condition.
- ✔ A collection of random communication or body-related DTCs stored in the system.
- ✔ Strange grounding issues or parasitic battery drain that you can’t seem to trace.
Fast-Track Installation: Your 5-Minute Guide
Getting your van back in service is simple. For the Express and Savana vans, the BCM is located in a relatively easy-to-access spot, making this a quick job for any DIYer or professional technician.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work. This prevents shorts and helps reset the vehicle’s systems.
- Locate the Module: In your Express Van, the BCM is typically found behind a panel in the center of the dashboard, often near the floor. It’s a black box with several multi-pin electrical connectors.
- Swap the Part: Carefully unplug the wiring harnesses from your old BCM. Unbolt or unclip the old module and remove it. Secure the new, pre-programmed module in its place and firmly reconnect all wiring harnesses.
- Power Up & Verify: Reconnect the negative battery terminal. Start the vehicle and test all the functions that were previously malfunctioning: HVAC fan speeds, power locks, windows, lights, and wipers.
- Post-Installation Checks: In some cases, a post-install procedure may be needed. If the airbag light remains on, a scan tool capable of the ‘Setup SDM Primary Key in BCM’ function will be required. Similarly, a brake pedal position relearn might be necessary. These are not always required but are good to be aware of.
Verified Fitment for Your GM Vehicle
This Body Control Module is a direct replacement for a wide range of General Motors vehicles. While this page is focused on the 2004-2007 Express 1500 BCM, it is also compatible with the following models and more. Please verify your part number (15137395) or one of the interchangeable numbers (15116066, 15137394, 15198116, etc.) for a guaranteed match.
- Chevrolet Express 1500/2500/3500 Van (2004-2007): Body Control (BCM); (center dash), with commercial tradesman package (opt PRP)
- Chevrolet Silverado & GMC Sierra 1500/2500/3500 (2003-2007 Classic): Body Control (BCM); (under steering column), Crew Cab models
- Chevrolet Tahoe/Suburban & GMC Yukon/XL (2003-2006): Body Control (BCM); (under steering column)
- Cadillac Escalade / ESV / EXT (2003-2006): Body Control (BCM); (under steering column)
- Hummer H2 (2004-2007): Body Control (BCM); (LH dash)
Frequently Asked Questions
Does this BCM need to be programmed by a dealer?
No. We program the module to your vehicle’s specific VIN before shipping. This makes it a plug-and-play installation, saving you the time and expense of a dealership visit.
What is the main cause of BCM failure in these vans?
In my 20+ years of experience, the most common causes are voltage spikes from jump-starts, water intrusion from a leaky windshield or cowl, and internal circuit board failure due to age and heat cycles.
Will this fix my airbag light?
If the airbag light is caused by a BCM-related code like B1001 (Option Configuration Error), then yes, this module will resolve the root cause. However, after installation, you may need a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and turn off the light.
Is there a core charge for this part?
No, there is absolutely no core charge. You can keep your old module without any hassle or need to return it.
Where is the BCM located on a 2005 Express 1500?
On the 2004-2007 Express and Savana vans, the Body Control Module is located in the center of the dashboard, usually low down and accessible by removing a lower dash panel. This is different from the trucks of the same era, where it’s typically under the steering column.