Tired of Electrical Gremlins in Your GM Truck or Van?
Is your Silverado, Sierra, Express, or Savana acting possessed? Flickering lights, power windows with a mind of their own, a security light that won’t turn off, or a battery that’s dead every morning are classic signs of a failing Body Control Module (BCM). The BCM is the nerve center for your vehicle’s body electronics, and when it goes bad, it can cause a cascade of frustrating and seemingly unrelated problems. In my 20+ years as a diagnostician, I’ve seen these modules cause more headaches than almost any other electronic component. A faulty BCM doesn’t just inconvenience you; it can leave you stranded.
The Direct Solution: A VIN-Programmed BCM
Stop chasing electrical ghosts and replacing perfectly good batteries. This Body Control Module is your direct-fit, hassle-free solution. We take the guesswork and the expensive trip to the dealership out of the equation. Simply provide us with your vehicle’s VIN during checkout, and we will program the BCM with the latest GM software specific to your exact vehicle configuration. It arrives at your door ready for installation, saving you hundreds in dealer programming fees.
Common Symptoms of a Failing GM BCM:
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security or anti-theft light staying illuminated, preventing the vehicle from starting.
- ✔ Unexplained parasitic battery drain that kills your battery overnight.
- ✔ Erratic gauge cluster behavior or warning lights.
- ✔ Horn honking unexpectedly or not working when pressed.
Expert Pro Tip from a 20-Year Tech: Before you install your new BCM, take a moment to inspect the area around the module’s location (under the steering column on trucks, in the center dash on vans). I’ve seen countless BCM failures caused by a slow, undetected windshield or A-pillar leak. Look for any signs of water staining, rust, or corrosion on nearby wiring or brackets. A simple water test on the windshield before installation can save your new module from the same fate as the old one.
Plug-and-Play Installation Guide
Replacing your 2003-2007 GM BCM is a straightforward job you can do at home with basic tools. Since we program it to your VIN, you skip the most difficult part—the dealer programming.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow all systems to discharge.
- Locate the BCM: On Silverado & Sierra pickups, it’s typically located under the driver’s side of the dashboard, near the steering column. On Express & Savana vans, it’s found behind the center dash trim.
- Remove Connectors: Carefully unplug all electrical connectors from the old BCM. They have locking tabs that need to be depressed. Do not force them.
- Swap the Module: Unbolt or unclip the old BCM from its mounting bracket and remove it. Install the new, pre-programmed BCM in its place.
- Reconnect Everything: Plug all electrical connectors firmly into the new BCM. You should hear or feel a ‘click’ as they lock into place. Reconnect the negative battery terminal.
CRITICAL Post-Installation Steps
Important: While this module is VIN-programmed for core functions, your vehicle’s security and safety systems require a final handshake procedure after installation. These steps require a bi-directional diagnostic scan tool (not a simple code reader).
- Airbag System (SRS): To clear the airbag warning light, you or your mechanic must perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake System: Some vehicles may require a ‘Brake Pedal Position Sensor Calibration’ to ensure the brake lights and stability control systems function correctly.
Failure to perform these steps can result in persistent warning lights and compromised safety systems. If you are not equipped to perform these procedures, we strongly recommend seeking assistance from a qualified professional technician.
Guaranteed Compatibility
This module is a direct replacement for part number 15747545 and also interchanges with the following part numbers: 15167329, 15194169, 15136224, 15116065, 15198115, 15136876, and 10367689. It is designed for a wide range of 2003-2007 Chevrolet Silverado, Express, SSR, GMC Sierra, and Savana models. Please verify the fitment list to ensure it matches your specific vehicle.