Is Your GM Truck or Van Experiencing Electrical Gremlins?
If you’re dealing with bizarre and frustrating electrical issues in your 2003-2007 Silverado, Sierra, Express, or Savana, a failing Body Control Module (BCM) is the most likely culprit. The BCM is the central nervous system for your vehicle’s body electronics, managing everything from your power windows and door locks to your interior lighting and security system. When it starts to fail, it can create a cascade of problems that are often difficult to diagnose.
From the Diagnostic Bay
We had a 2005 Silverado 1500 come into the shop that was driving the owner crazy. The dome light would randomly turn on while driving, the power locks would cycle on their own, and sometimes the truck wouldn’t start, displaying a ‘Security’ light on the dash. The battery and alternator checked out fine. After tracing the wiring, we pinpointed the issue: an internally failing BCM. Swapping it with a properly programmed unit like this one resolved every single issue. The truck was back to being reliable, and the owner was thrilled to have his vehicle back in working order without the constant electrical annoyances.
Common Symptoms of a Failing BCM
- ✔ Power windows, mirrors, or door locks operating intermittently or not at all.
- ✔ Interior or exterior lights staying on, flickering, or not turning on when they should.
- ✔ The vehicle’s security system acting erratically or preventing the engine from starting.
- ✔ Gauges on the instrument cluster behaving strangely or not working.
- ✔ The horn honking unexpectedly.
- ✔ Communication errors with other vehicle modules, leading to various warning lights.
The Direct-Fit, Programmed Solution for Your 2003-2007 Silverado BCM
Don’t let a faulty BCM keep your truck off the road. This is a direct-fit replacement Body Control Module for a wide range of GM trucks and vans, including the Silverado, Sierra, Express, and Savana. What sets our solution apart is the essential programming service we provide. We flash the module with the latest GM software updates and program it specifically to your vehicle’s Vehicle Identification Number (VIN) before it ships. This ensures seamless integration and functionality right out of the box, eliminating the need for an expensive trip to the dealership for programming.
This module is a reliable replacement for the following part numbers: 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, 10367689. Please ensure one of these numbers matches your original part to guarantee compatibility.
Installation and Post-Install Procedures
Installation is straightforward for those with moderate mechanical skill. In most trucks, the BCM is located under the steering column, while in vans it’s typically behind the center dash. After installation, certain procedures may be necessary to fully sync the new module with your vehicle’s systems:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure correct operation of the brake lights and stability control systems.
Note: Specific procedures can vary. Always consult a factory service manual or a qualified technician for guidance.
Frequently Asked Questions
Why do I need to provide my VIN?
Your vehicle’s VIN is essential for us to program the BCM correctly. This programming matches the module to your truck’s specific features and security system, making the installation process as simple as possible and ensuring all functions work as intended from the factory.
Is this part truly plug-and-play?
Because we pre-program the module to your VIN, it is designed to be as close to plug-and-play as possible. However, as noted, some vehicles may require additional procedures like an airbag system sync or a brake pedal position relearn, which require a capable diagnostic scan tool.
Do I have to return my old BCM?
No, there is no core charge for this part. You can keep your original module without any additional fees or hassle.
Where is the BCM located on my vehicle?
On most Silverado and Sierra pickups from this era, the BCM is located under the driver’s side dashboard, near the steering column. On Express and Savana vans, it is typically found in the center of the dashboard area.
What if my airbag light is on after I install the BCM?
This is a known possibility. It means the new BCM needs to be electronically ‘introduced’ to your vehicle’s airbag module (SDM). A mechanic with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this and turn off the light.