Finally, A Real Fix for Your Van’s Baffling Electrical Problems
If you’re dealing with a 2004-2007 Chevrolet Express 1500 Van that seems to have a mind of its own—with flickering lights, a dead HVAC system, or power locks that work intermittently—you’re not alone. These strange, unrelated issues often point to a single culprit: a failing Body Control Module (BCM). This VIN-programmed GM 15116066 BCM is the direct-fit, reliable solution that restores full functionality to your vehicle’s electronics without a costly trip to the dealership for programming.
A Technician’s Notebook: The Contractor’s Work Van
I had a contractor bring his 2006 Express 2500 work van into my shop, completely frustrated. He was losing work because some mornings the van wouldn’t start (security light flashing), and on other days the power door locks wouldn’t work, forcing him to manually lock every door. He’d already replaced the battery and checked the fuses. After connecting my scanner, I saw a handful of communication codes and a B1001 DTC. This immediately pointed me to the BCM. These modules are the central hub for all body electronics, and when they start to fail internally, they create a cascade of bizarre issues. We installed a VIN-programmed BCM, and in less than 10 minutes, every single one of his problems was gone. It’s a common failure, and this is the most effective fix.
Is Your Van Exhibiting These Classic BCM Failure Signs?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s highly likely your module is the problem. Replacing your 2004-2007 Express 1500 BCM can resolve these issues:
- ✔ The security or anti-theft system prevents the engine from starting.
- ✔ Power windows, door locks, or interior lights work sporadically or not at all.
- ✔ The HVAC blower motor or climate controls are unresponsive.
- ✔ Your dashboard displays an airbag warning light, often with a DTC like B1001.
- ✔ Headlights, taillights, or turn signals malfunction without a bad bulb or fuse.
- ✔ The windshield wipers operate erratically or won’t turn off.
A Straightforward Guide to Installation
For most DIYers and professionals, this is a quick and simple repair. On the Express and Savana vans, the BCM is typically located in the center dash area. No complex tools are required.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: Find the module in the center dash. 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 release tabs that need to be pressed. Once disconnected, remove the module from its mounting bracket.
- Install the New Module: Seat the new, pre-programmed BCM into the mounting bracket and securely plug in all the electrical connectors.
- Reconnect and Test: Reconnect the battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and HVAC to confirm the repair is successful.
Important Post-Installation Note: While our VIN programming handles the majority of the setup, some vehicles may require a ‘Setup SDM Primary Key in BCM’ procedure if the airbag light remains on. This syncs the new BCM with the airbag system and must be performed with a compatible professional scan tool.
Will This Fit My GM Vehicle?
This BCM, part number 15116066, is a direct replacement for a wide range of GM trucks, vans, and SUVs. It is interchangeable with part numbers 10383536, 15136225, 15136877, and others. Please verify your vehicle is on the list below:
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 1500/2500/3500 03-06 Body Control (BCM); (under steering column), Crew Cab
SILVERADO 1500/2500/3500 07 Classic Body Control (BCM); (under steering column), Crew Cab
SIERRA 1500/2500/3500 03-06 Body Control (BCM); (under steering column), Crew Cab
SIERRA 1500/2500/3500 07 Classic Body Control (BCM); (under steering column), Crew Cab
SIERRA DENALI 03-06 Body Control (BCM); (under steering column)
TAHOE 03-06 Body Control (BCM); (under steering column)
YUKON & YUKON XL 03-06 Body Control (BCM); (under steering column)
SUBURBAN 1500/2500 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 ‘VIN Programmed’ mean for me?
It means we load your vehicle’s specific Vehicle Identification Number (VIN) and all related software onto the module before we ship it. This makes the installation plug-and-play, saving you from a mandatory, expensive programming session at a dealership.
Is this a difficult part to replace myself?
Not at all. For a 2004-2007 Express 1500 Van, the BCM is accessible behind a dash panel. With basic hand tools, most people can swap it in under 30 minutes. The key is our pre-programming, which eliminates the most complex part of the job.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep your old module, which simplifies the process for you.
Will this fix my airbag light?
If the airbag light is caused by a faulty BCM (like DTC B1001), this part will correct the root cause. However, after installation, the airbag system may need to be re-synced to the new BCM using a professional scan tool to clear the light.
What if I have other questions during installation?
We’re here to help. Our team of experts has hands-on experience with these vehicles and parts. You can contact us for support to ensure your repair goes smoothly.