Solve Your Truck’s Frustrating Electrical Problems for Good
If you’re dealing with bizarre electrical issues in your Chevy Silverado 2500, you know how maddening it can be. One day the power windows work, the next they don’t. The security light flashes randomly, or the HVAC system has a mind of its own. These aren’t separate problems; they often point to a single failing component: the Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can wreak havoc. This replacement BCM, part number 15137395, is the definitive, hassle-free solution. We pre-program it to your truck’s VIN, so it’s ready for a true plug-and-play installation right out of the box—no expensive trip to the dealership required.
A Technician’s Notebook: The Silverado Ghost
I once had a 2006 Silverado 2500 in my bay that the owner called ‘The Ghost.’ The dome lights would flicker, the radio would cut out, and sometimes it just wouldn’t start. He’d replaced the battery and checked the grounds twice. After hooking up my scanner, I saw a dozen intermittent communication codes. Instead of chasing wires for hours, I went straight for the BCM. A quick swap with a programmed module, and every single issue vanished. In my 20+ years of experience, I’ve seen this exact scenario play out hundreds of times. A failing BCM is the root cause of many of these hard-to-diagnose electrical gremlins on GM trucks.
Is Your Silverado 2500 Showing These Signs of BCM Failure?
A failing BCM doesn’t always trigger a check engine light, making it tricky to diagnose. If your truck is experiencing any of the following, the BCM is the most likely culprit.
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ HVAC controls are unresponsive, or the blower motor works sporadically.
- ✔ The anti-theft system malfunctions, causing a no-start condition (blinking security light).
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ An illuminated airbag light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Unexplained battery drain or strange communication codes between modules.
Your 5-Minute BCM Installation Guide
Getting your truck back to 100% is easier than you think. This is a job most DIYers can handle in their driveway in under 5 minutes with basic tools.
- Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work.
- Locate the BCM: On most Silverado and Sierra trucks, the BCM is located under the driver’s side of the dashboard, just to the left of the steering column.
- Swap the Module: Carefully unplug the electrical connectors from your old BCM. They have locking tabs, so be gentle. Plug the connectors into your new, pre-programmed module.
- Reconnect and Test: Reconnect the battery terminal. Start the truck and test all the functions that were previously malfunctioning—windows, locks, lights, and HVAC—to confirm the repair.
Post-Installation Note: In some cases, an airbag light may remain on after installation. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules. Similarly, a brake pedal position relearn might be needed. These are simple procedures for any qualified technician.
Verified Fitment For Your GM Truck & SUV
This module is a direct replacement for part number 15137395 and is interchangeable with several other part numbers. It is guaranteed to fit the following vehicles (Crew Cab models unless otherwise specified):
- Chevrolet Silverado 2500/3500 Pickup (2003-2007 Classic)
- Chevrolet Silverado 1500 Pickup (2003-2007 Classic)
- Chevrolet Avalanche 1500/2500 (2003-2006)
- Chevrolet Suburban 1500/2500 (2003-2006)
- Chevrolet Tahoe (2003-2006)
- Chevrolet Express Van 1500/2500/3500 (2004-2007 w/ PRP option)
- GMC Sierra 2500/3500 Pickup (2003-2007 Classic)
- GMC Sierra 1500 Pickup (2003-2007 Classic)
- GMC Yukon & Yukon XL 1500/2500 (2003-2006)
- GMC Savana Van 1500/2500/3500 (2004-2007 w/ PRP option)
- Cadillac Escalade, ESV, EXT (2003-2006)
- Hummer H2 (2003-2007)
Frequently Asked Questions
Do I need to program this 2003-2007 Silverado 2500 BCM?
No. We pre-program the module to your vehicle’s specific VIN before shipping. This ensures it works correctly right out of the box, saving you a trip to the dealer for expensive programming.
Where is the BCM located on my Silverado?
On most 2003-2007 Silverado and Sierra models, the Body Control Module is found under the dashboard on the driver’s side, typically to the left of the steering column.
What if my airbag light is still on after installation?
If the airbag light remains on, it means the new BCM needs to be electronically ‘introduced’ to the airbag’s Sensing and Diagnostic Module (SDM). A mechanic with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Do I have to return my old BCM? Is there a core charge?
No, there is absolutely no core charge. You can keep your old part, which makes for a simpler, faster repair process.
What other part numbers does this module replace?
This BCM is a direct replacement for part number 15137395 and also interchanges with 15116066, 15137394, 15198116, 10383536, and many others to ensure wide compatibility.