Is Your GM Truck or Van Acting Possessed?
Are you dealing with flickering lights, power windows and locks with a mind of their own, or a radio that randomly turns on and off? These aren’t just annoying quirks; they’re classic signs of a failing Body Control Module (BCM). In my 20+ years in the shop, I’ve seen these symptoms countless times on Silverado, Sierra, Express, and Savana models. The BCM is the nerve center for your vehicle’s body electronics, and when it goes, it can cause a cascade of frustrating and unpredictable problems.
Real-World Diagnosis: “A customer’s ’05 Silverado 2500 came in last week with the dome lights staying on and the radio acting possessed, draining the battery overnight. We traced it back to a classic BCM failure, likely caused by moisture from a minor windshield leak over the years. Swapping in a VIN-programmed module like this one was the definitive fix, and he was back on the road the same day without a trip to the dealer.”
The Direct Solution: A VIN-Programmed BCM
Don’t let a faulty module sideline your workhorse. This replacement BCM is the straightforward, reliable solution. We take the guesswork and dealer expense out of the equation. Simply provide us with your vehicle’s VIN after purchase, and we will flash this module with the latest, most stable GM software specific to your truck or van. It arrives at your door ready to be installed.
Common Symptoms of a Failing 2003-2007 GM BCM:
- ✔ Erratic or non-functional power windows and door locks.
- ✔ Interior dome lights or exterior lights staying on or not working at all.
- ✔ The security light flashing, preventing the engine from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Dashboard warning lights appearing randomly.
- ✔ Issues with the radio or climate control functions.
Easy Installation & Critical Final Steps
Replacing the BCM is a manageable job for a confident DIYer. While the process is plug-and-play, completing the job correctly requires a couple of important final steps to ensure all systems communicate properly.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the BCM: On Silverado and Sierra pickups, it’s typically found under the driver’s side of the dashboard, near the steering column. On Express and Savana vans, it’s usually behind the center dash panel.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM and remove it.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical connectors.
- Reconnect Battery: Reattach the negative battery terminal.
IMPORTANT: Post-Installation Procedures
After your new BCM is installed, you must perform the following procedures with a compatible high-level diagnostic scan tool to restore full functionality and prevent warning lights. This is not optional.
- Airbag System Reset: To clear the airbag warning light, you must perform the ‘Setup SDM Primary Key in BCM’ procedure. This re-establishes the security handshake between the new BCM and the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake System Check: Some vehicles may require a ‘Brake Pedal Position Sensor Calibration’ after BCM replacement. This ensures the brake lights and stability control systems receive accurate input.
Guaranteed Fitment
This module is a direct replacement for the following part numbers: 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. Please verify your part number and check the detailed fitment list to ensure compatibility with your specific vehicle and options.