Solve Your Truck’s Electrical Gremlins for Good
Is your 2003-2007 Silverado 1500 acting possessed? One minute the power windows work, the next they don’t. The A/C blower motor has a mind of its own, and strange warning lights appear on the dash. These aren’t separate problems; they’re classic symptoms of a failing Body Control Module (BCM). The BCM is the central nervous system for your truck’s body electronics, and when it malfunctions, it creates a cascade of frustrating, seemingly random issues. This replacement module, part number 15137394, is the definitive solution, arriving pre-programmed to your truck’s VIN for a simple, plug-and-play installation.
A Technician’s Notebook: The Silverado with a Ghost
I once had a 2005 Silverado 1500 Crew Cab in my bay that was driving the owner crazy. The radio would cut out, the dome light would flicker, and the security light would stay on, sometimes causing a no-start condition. He’d already replaced the battery and checked the main grounds. After hooking up my scanner, I saw a handful of communication codes and a B1001 for an airbag system fault. Instead of chasing each symptom individually, experience pointed me straight to the BCM. These modules, especially on the GMT800 platform, are notorious for internal circuit board failures that cause these exact kinds of sporadic electrical nightmares. A new, properly programmed BCM fixed every single issue in under 10 minutes. It’s a common failure I’ve diagnosed hundreds of times.
Is Your Truck Showing These Symptoms?
- ✔ The HVAC blower motor works intermittently or not at all.
- ✔ Power windows, door locks, or mirrors operate erratically.
- ✔ The airbag warning light is illuminated, often with a DTC like B1001.
- ✔ Interior or exterior lights flicker, stay on, or won’t turn on.
- ✔ The factory security system malfunctions, causing alarm or no-start problems.
- ✔ Wipers behave unpredictably, activating on their own or not working when needed.
- ✔ Communication errors with other modules are present during a diagnostic scan.
Your Straightforward Guide to Installation
Getting your truck back to normal doesn’t require a trip to the dealership. This installation is one of the easiest you can do. With our pre-programmed 2003-2007 Silverado 1500 BCM, you’ll be done in minutes.
- Safety First: Always disconnect the negative terminal on your truck’s battery to prevent electrical shorts and reset the system.
- Locate the BCM: On most Silverado and Sierra models, the BCM is located under the driver’s side dashboard, near the steering column. It’s a black plastic box with several large multi-pin connectors.
- Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Remove any mounting bolts or clips holding the old module in place and swap it with your new one.
- Reconnect and Test: Plug the connectors firmly into the new module. Reconnect the battery terminal. Start the truck and test all functions—windows, locks, lights, wipers, and HVAC—to confirm the repair.
- Post-Install Checks: In some cases, an airbag light may persist. This requires a ‘Setup SDM Primary Key’ procedure with a bi-directional scan tool. Similarly, a brake pedal position relearn may be needed. These are simple procedures for any professional shop if required.
Guaranteed Fitment for Your GM Truck or SUV
This BCM is a direct replacement for part number 15137394 and interchanges with several other part numbers including 15116066, 15137393, and 15198116. It is designed for a wide range of General Motors vehicles. While this page focuses on the 2003-2007 Silverado 1500 BCM, please verify your specific model in the list below:
- Chevrolet Silverado/GMC Sierra 1500/2500/3500 (2003-2007 Classic): Primarily Crew Cab models.
- Chevrolet Tahoe/Suburban & GMC Yukon/Yukon XL (2003-2006)
- Cadillac Escalade, ESV, EXT (2003-2006)
- Chevrolet Avalanche (2003-2006)
- Hummer H2 (2003-2007)
- Chevrolet Express/GMC Savana Van (2004-2007): With commercial tradesman package (opt PRP).
Frequently Asked Questions
Do I need to have this BCM programmed by the dealer?
No. We program the module to your vehicle’s VIN before shipping it to you. This ensures it is ready for immediate installation without any additional programming or dealership visits.
Is there a core charge for my old part?
There is absolutely no core charge. You can keep your old module, so there’s no need to worry about return shipping or waiting for a refund.
How difficult is the installation for a DIYer?
This is a great DIY project. The physical swap typically takes less than 10 minutes with basic hand tools. The module is easily accessible under the driver’s side dash.
My airbag light came on after installing the new BCM. What should I do?
This is a normal security measure. The BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to turn off the light.
What does this part interchange with?
This module replaces numerous GM part numbers, including 15116066, 15136225, 15137393, 15137394, 15137395, 15198116, and more, ensuring wide compatibility.