Is Your 2003-2007 GM Truck Plagued by Baffling Electrical Issues?
If you’re dealing with flickering lights, unresponsive power windows, a malfunctioning HVAC system, or a security light that won’t turn off, the culprit is likely a failing Body Control Module (BCM). The BCM acts as the central nervous system for your truck’s body electronics, coordinating everything from door locks to the dashboard display. When it fails, it can cause a cascade of frustrating and seemingly unrelated problems. This OEM-quality replacement BCM, part number 15137395, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
Solving Problems with a Programmed 2003-2007 Silverado BCM
Don’t let a faulty module keep your truck off the road or full of annoying glitches. This replacement BCM is engineered to restore full functionality and communication between your vehicle’s electronic systems. By programming the module with the latest GM software updates tied to your VIN, we eliminate the need for expensive dealership tools or post-installation flashing. This ensures all factory-installed options on your Silverado, Sierra, Tahoe, or other compatible GM vehicle work exactly as they should from the moment you plug it in.
Symptoms of a Failing GM Body Control Module
- ✔ Intermittent or total loss of power windows, door locks, or mirrors.
- ✔ HVAC climate controls or blower fan not working correctly.
- ✔ Erratic behavior from interior or exterior lights (staying on, not turning on, or flickering).
- ✔ “Service Theft System” message on the dash or a no-start condition due to security system faults.
- ✔ Airbag warning light illuminated, often with DTC B1001 or other communication codes.
- ✔ Windshield wipers operating on their own or not responding to the switch.
- ✔ False warnings or inaccurate readings on the instrument cluster.
Installation & Post-Install Considerations
Installation is simple for the DIY mechanic. The BCM is typically located under the driver’s side dashboard, near the steering column. Disconnecting the battery for 10-15 minutes before swapping the modules is recommended to help clear any residual fault codes. While our VIN programming handles the majority of the setup, some vehicles may require a ‘Setup SDM Primary Key in BCM’ procedure with a professional scan tool if the airbag light remains on after installation. This syncs the new BCM with the airbag system. In some cases, a Brake Pedal Position Relearn may also be needed. There is no core charge, so you don’t have to worry about returning your old part.
Frequently Asked Questions
What does a BCM do on a 2003-2007 Silverado?
The Body Control Module (BCM) on a Silverado manages a wide range of non-engine related electronics. This includes power windows, door locks, the security system, interior and exterior lighting, wipers, and the HVAC system. It’s the main computer for your truck’s comfort and convenience features.
Is this BCM ready to install right out of the box?
Yes! We pre-program the module to your vehicle’s VIN before shipping. This makes it a plug-and-play installation, with no need for a trip to the dealership for additional programming.
What happens if I don’t provide my VIN?
Providing your VIN is essential for the programming service. Without it, we cannot flash the module with the correct software for your truck’s specific options, and the part will not function correctly.
Will this fix my airbag light?
This module can resolve airbag lights caused by BCM communication faults (like DTC B1001). However, if the light stays on after installation, a simple ‘SDM Key Relearn’ procedure may be required with a bi-directional scan tool to sync the airbag system to the new BCM.
Where is the BCM located on my 2005 Silverado?
On most 2003-2007 Silverado, Sierra, and Tahoe models, the BCM is located under the driver’s side of the dashboard, usually attached to a bracket near the steering column. It’s a black box with several large electrical connectors.