Solve Your Van’s Electrical Issues with a Plug-and-Play BCM
If you’re dealing with frustrating electrical problems in your 2004-2007 GMC Savana 2500 Van, a failing Body Control Module (BCM) is often the culprit. As the central command for your vehicle’s body electronics, a faulty BCM can cause a cascade of issues, from flickering lights to a no-start condition. This replacement BCM, part number 15116066, arrives expertly programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and getting your workhorse back on the road fast.
A Technician’s Notebook: The Case of the Contractor’s Van
I had a contractor bring his Savana 2500 work van into my bay last month with a list of bizarre symptoms. The dome lights would stay on, the power locks worked only half the time, and occasionally, the van wouldn’t start, leaving him stranded at a job site. He’d already replaced the battery and checked fuses. After hooking up my scanner, I found a handful of communication codes pointing to the BCM. A failing Body Control Module, especially due to internal solder joint cracks from years of vibration, is a common failure I’ve diagnosed on hundreds of these GM platforms. Installing a VIN-programmed 2004-2007 Savana 2500 BCM resolved every single one of his issues in under 10 minutes.
Common Signs of a Failing GM Body Control Module
A failing BCM can manifest in numerous ways that seem unrelated. If your vehicle is experiencing any of the following, this module is the likely solution.
- ✔ Intermittent or non-functional power windows, door locks, or interior lights.
- ✔ HVAC blower motor or climate controls not working correctly.
- ✔ The security system light is flashing, causing a no-start or crank-no-start condition.
- ✔ An active airbag warning light on the dash, sometimes with a DTC like B1001 (Option Configuration Error).
- ✔ Erratic windshield wiper operation or failure.
- ✔ A cluster of seemingly random diagnostic trouble codes (DTCs) related to body systems.
A Straightforward Guide to Your BCM Installation
One of the best features of this module is its simple, direct-fit installation. No complex wiring or special tools are required. For a 2004-2007 Savana 2500 BCM, the process is especially easy.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and allow the system to reset.
- Locate the Module: In most Savana and Express vans, the BCM is conveniently located in the center of the dashboard, easily accessible from below.
- Swap the Connectors: Carefully unplug the electrical connectors from your old BCM and plug them directly into your new, pre-programmed module. The connectors are keyed to only fit one way.
- Reconnect and Test: Reconnect the battery terminal. Start your vehicle and test all functions—lights, locks, windows, wipers, and HVAC—to confirm the repair.
- Post-Install Checks: In some cases, an airbag light may persist. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This is a quick sync and does not mean the part is defective.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15116066 and is interchangeable with several other part numbers, including 15136225, 15198116, and 10383536. It fits a wide range of GM trucks, vans, and SUVs. Please verify your specific model and options below.
- GMC Savana / Chevrolet Express 1500/2500/3500 Van (2004-2007): Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
- Chevrolet Silverado / GMC Sierra 1500/2500/3500 (2003-2007): Body Control (BCM); (under steering column), check for specific cab and transmission options. ‘Classic’ models included.
- 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
Why is a VIN-programmed BCM better than a generic one?
Our BCMs are programmed specifically to your vehicle’s VIN before shipping. This ensures that all factory-installed options (like power seats, specific lighting, security systems) work correctly right out of the box. A generic module from a parts store or salvage yard would require a trip to the dealer for expensive programming.
Is this installation something I can do myself?
Absolutely. For most DIYers with basic hand tools, this is a very straightforward job that typically takes less than 15 minutes. The location in Savana vans makes it particularly easy to access without removing major dash components.
My airbag light came on after I installed the new BCM. Is the part bad?
No, this is a normal security procedure in some GM vehicles. The new BCM needs to be electronically ‘introduced’ to the airbag’s Sensing and Diagnostic Module (SDM). A repair shop with a capable scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and turn off the light.
Do I need to send my old part back?
No. We do not require a core return for this part. You can keep or dispose of your old module without any core charges or hassle.
Will this BCM fix my van’s security system issues?
Yes, in most cases. The BCM is integral to the Passlock/Passkey security system. A failing module is a very common cause of security-related no-start conditions. Replacing it with a correctly programmed unit restores this functionality.