Are you battling frustrating electrical gremlins in your GM truck or van? Issues like flickering lights, malfunctioning power windows and locks, or a security system that acts up on its own are often signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a wide range of confusing and intermittent problems. This replacement BCM, part number 15747545, is the definitive solution to restore your vehicle’s functionality and peace of mind.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We pre-program the module to your vehicle’s specific VIN, loading it with the latest software updates from GM. This critical step ensures seamless communication with your vehicle’s other systems and eliminates the need for an expensive trip to the dealership for programming. Simply provide your VIN after purchase, and we’ll handle the rest, shipping you a part that’s ready for installation right out of the box.
We had a 2005 Silverado 2500 in the shop with a classic parasitic drain. The owner had already replaced the battery twice and the alternator once, but the battery would still be dead every few days. After hours of diagnostics, we traced the drain back to the BCM. It wasn’t fully ‘going to sleep’ when the truck was off, keeping several circuits active and slowly draining the battery. Installing a VIN-programmed BCM like this one solved the problem instantly. It’s a reminder that the BCM can cause not just active issues, but silent, battery-killing problems as well.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights (headlights, dome lights, dash lights).
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security system or anti-theft light staying on, preventing the vehicle from starting.
- ✔ Wipers turning on by themselves or not working when commanded.
- ✔ Unexplained parasitic battery drain that kills your battery overnight.
- ✔ False warning messages on the driver information center (DIC).
Why Choose Our Pre-Programmed 2003-2007 Silverado BCM?
This module is a direct replacement for a wide range of GM trucks and vans, including the Silverado, Sierra, Express, and Savana models. It is a reliable and cost-effective way to solve complex electrical issues without the hassle of dealership programming. By matching the software to your VIN, we ensure all your vehicle’s original features function correctly. This unit is a direct fit for multiple part numbers, including 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689.
Post-Installation Requirements
While our programming handles the majority of the setup, some vehicles may require additional steps after installation. These are typically simple procedures that can be performed with a high-end diagnostic tool. This may include an ‘Airbag System Sync’ if the airbag light is on, or a ‘Brake Pedal Position Relearn’ to ensure proper brake light and traction control operation. Always consult a factory service manual or a qualified technician for vehicle-specific guidance.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM acts as the brain for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, wipers, security system, and interior chimes.
Is this BCM difficult to install?
The physical installation is straightforward for most DIY mechanics. It’s typically located under the steering column or in the center dash. Since we pre-program the unit, you avoid the most complex part of the job. However, some post-install relearn procedures may require a professional scan tool.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and settings your truck had from the factory. This ensures all your specific options (like power seats, keyless entry, etc.) work correctly and that the module communicates properly with the rest of your vehicle.
What happens if I don’t perform the post-installation procedures?
If your vehicle requires them, not performing procedures like the airbag sync or brake position relearn can result in a persistent airbag warning light or issues with brake light and traction control functionality.
Will this part work for my Sierra or Savana van?
Yes, this BCM is compatible with a wide range of GM vehicles from this era, including the Sierra 1500/2500/3500, Silverado 1500/2500/3500, Express vans, and Savana vans. Please check the detailed fitment list on this page to confirm compatibility with your specific model and options.