Is Your GM Truck or Van Acting Possessed?
You know the feeling. One day the dome light won’t turn off. The next, your power windows have a mind of their own, or the radio cuts out randomly. Maybe you’re getting a persistent “Service Security System” message on the dash. These aren’t just annoying quirks; they’re classic signs of a failing Body Control Module (BCM). For over 20 years in the shop, I’ve seen these exact issues on hundreds of Silverados, Sierras, and Express vans. The BCM is the central hub for your vehicle’s body electronics, and when it starts to fail, it creates a cascade of frustrating electrical gremlins.
Real-World Diagnosis: The 2005 Silverado Case
A customer’s 2005 Silverado 1500 came in last week with these exact symptoms—plus, the horn would honk when he used the turn signal. He’d already replaced the battery and checked all the fuses. The problem was a classic internal BCM failure caused by years of heat cycles and voltage spikes. We swapped in one of our pre-programmed modules, and in under an hour, every single issue was resolved. He drove away without a single electrical problem and saved hundreds compared to a dealership repair.
The Simple, Reliable Fix: A Pre-Programmed GM Body Control Module
Don’t let a faulty BCM sideline your truck or van. This isn’t a part you can just grab from a shelf and install. A new BCM requires specific programming to your vehicle’s Vehicle Identification Number (VIN) to communicate with the other computers on board. We handle that for you. Simply provide your VIN at checkout, and we’ll program this BCM with the latest GM software updates specifically for your vehicle. It arrives at your door ready for a straightforward installation.
Common Symptoms of a Failing BCM:
- ✔ Erratic power windows, door locks, or interior/exterior lights
- ✔ Intermittent radio or climate control operation
- ✔ False security system alarms or “Service Security System” warnings
- ✔ Horn honking unexpectedly
- ✔ Communication errors with diagnostic scan tools
- ✔ Inoperative remote keyless entry
Easy Installation & Critical Final Steps
Replacing the BCM is a manageable job for a DIYer. In most trucks, it’s located under the steering column, and in vans, it’s behind the center dash panel.
- Safety First: Always disconnect the negative battery terminal and wait 10 minutes before starting.
- Locate the BCM: Access the module by removing the necessary trim panels (e.g., the knee bolster under the steering wheel).
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs, so don’t force them. Unbolt the old module and remove it.
- Install the New Module: Bolt your new, pre-programmed BCM into place and securely reconnect all electrical connectors.
- Reconnect Battery: Re-attach the negative battery terminal.
IMPORTANT: Post-Installation Procedures Required
After installing your new GM Body Control Module, two final procedures are often necessary to ensure all systems function correctly. These require a bi-directional scan tool.
- Airbag System Reset: To clear the airbag warning light, you must perform the ‘Setup SDM Primary Key in BCM’ procedure. This re-establishes communication between the new BCM and the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Sensor Relearn: Some vehicles require a recalibration of the brake pedal position sensor. This ensures the brake lights and stability control systems receive accurate input.
If you are not equipped to perform these steps, a local independent mechanic can typically complete them quickly.
Guaranteed Compatibility
This module is a direct replacement for the following part numbers:
15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, 10367689
Please verify your vehicle’s fitment using the compatibility list. This unit is designed for a wide range of 2003-2007 Chevrolet Silverado, Express, SSR, GMC Sierra, and Savana models. Ensure you match the specific options for your vehicle (e.g., cab type, transmission) for a perfect match.