Restore Control and End Electrical Frustration
Are you chasing electrical gremlins in your GM truck? One minute the power windows work, the next they don’t. The A/C blower motor has a mind of its own, and you’re seeing strange warning lights on the dash. As a technician with over two decades of experience, I can tell you that these maddening, intermittent issues often point to one culprit: a failing Body Control Module (BCM). This isn’t just a part; it’s the central command center for your truck’s comfort and security features. When it fails, it can feel like your vehicle is haunted. This replacement BCM, part number 15137394, is the definitive solution, arriving pre-programmed to your truck’s specific VIN for a true plug-and-play fix.
From the Diagnostic Bay: The Case of the Possessed Pickup
I remember a 2006 Silverado 3500 rolling into my shop with a laundry list of bizarre complaints. The owner was at his wit’s end. The radio would switch off, the door locks would cycle randomly while driving, and the security light would stay on, sometimes causing a no-start condition. He’d already replaced the battery and checked all the fuses. After connecting my scanner, I saw a slew of communication codes, including the infamous BCM code B1001. Instead of spending hours tracing wires for a potential short, experience told me the BCM’s internal logic was failing. We installed a VIN-programmed module just like this one. In under 10 minutes, every single one of his electrical problems was gone. It’s a common failure, and this is the most reliable fix.
Is Your Silverado Suffering from These Electrical Issues?
A failing BCM doesn’t always cause a complete shutdown. It often starts with small, annoying problems that grow worse over time. If you’re experiencing any of the following, your BCM is the likely cause:
- ✔ Intermittent or non-functional power windows, door locks, or interior lights.
- ✔ HVAC system problems, such as a blower motor that won’t turn on or can’t be controlled.
- ✔ An illuminated airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Security system errors, including the security light staying on or causing a no-start condition.
- ✔ Erratic behavior from windshield wipers or other accessories that seem to have a mind of their own.
- ✔ A cluster of communication or body-related DTCs stored in the vehicle’s memory.
Your 5-Minute Guide to a DIY BCM Replacement
Forget expensive dealership visits and programming fees. This module is designed for a straightforward installation that most DIYers can complete with basic hand tools. Your 2003-2007 Silverado 3500 BCM is typically located under the driver’s side dashboard, near the steering column.
- Safety First: Before you begin, disconnect the negative terminal from your vehicle’s battery. This prevents any electrical shorts and helps reset the system.
- Locate the Module: Find the BCM under the driver’s side dash. It’s a plastic box with several large multi-pin electrical connectors.
- Swap the Connectors: Carefully unclip and remove the electrical connectors from the old BCM. They are color-coded and uniquely shaped, so you can’t mix them up.
- Install the New BCM: Securely plug the connectors into your new, VIN-programmed BCM. You should hear a distinct click as they lock into place.
- Power Up: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position and test all functions—windows, locks, lights, HVAC, and wipers—to confirm the repair was successful.
Verified Fitment for Your GM Truck, SUV, or Van
This module is a direct replacement for part number 15137394 and is interchangeable with several other part numbers, including 15116066, 15137393, and 15198116. It provides guaranteed compatibility for a wide range of General Motors vehicles. Please verify your model and options below:
AVALANCHE 1500/2500 (2003-2006)
SILVERADO 1500/2500/3500 PICKUP (2003-2007 Classic Style, Crew Cab)
SUBURBAN 1500/2500 (2003-2006)
TAHOE (2003-2006)
EXPRESS 1500/2500/3500 VAN (2004-2007 w/ opt PRP)
GMC:
SIERRA 1500/2500/3500 PICKUP (2003-2007 Classic Style, Crew Cab)
SIERRA DENALI (2003-2007 Classic Style)
YUKON & YUKON XL 1500/2500 (2003-2006)
SAVANA 1500/2500/3500 VAN (2004-2007 w/ opt PRP)
Cadillac:
ESCALADE, ESV, EXT (2003-2006)
Hummer:
H2 (2003-2007)
Frequently Asked Questions
Do I need to get this BCM programmed by a dealer?
No. This module comes fully pre-programmed to your vehicle’s VIN. It’s ready for installation right out of the box, saving you the time and expense of a dealership visit.
What is a core charge? Do I need to send my old part back?
There is absolutely no core charge for this part. You can keep your old module without any extra fees or hassle.
My airbag light is on after installation. What should I do?
In some cases, the new BCM needs to sync with the airbag system (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure, which can be performed by a technician with a professional-grade scan tool. This is only necessary if the light appears after the swap.
What tools do I need for the installation?
Installation typically only requires basic hand tools, such as a socket or wrench to disconnect the battery terminal and possibly a small trim removal tool to access the module. No special electronic tools are needed for the swap itself.
Will this fix my truck’s no-start problem?
If your no-start issue is caused by the factory security system (Passlock/Passkey) being controlled by a faulty BCM, then yes, this module is designed to resolve that problem.