Restore Full Electrical Function to Your GM Truck or Van
Are you battling frustrating electrical gremlins in your truck or van? Flickering lights, unresponsive power windows and locks, or a security system that has a mind of its own are all common signs of a failing Body Control Module (BCM). The BCM is the central hub for your vehicle’s body electronics, and when it fails, it can cause a wide range of perplexing issues. This replacement BCM, part number 15747545, is the definitive solution to restore your vehicle’s electronic systems to perfect working order.
From the Diagnostic Bay
We had a 2005 Silverado 2500 in the shop where the owner was convinced he had a bad power window motor and a faulty door lock actuator on the driver’s side. He had already replaced both, but the problem persisted. A quick scan showed multiple communication loss codes with the BCM. Instead of continuing to replace individual components, we swapped in a VIN-programmed BCM. Instantly, the windows, locks, and even the dome light—which he hadn’t mentioned was also acting up—started working perfectly. It’s a classic case of the BCM being the root cause of multiple, seemingly unrelated electrical problems.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or won’t turn on at all.
- ✔ The security system or keyless entry failing to work correctly.
- ✔ Horn sounding unexpectedly or not working when pressed.
- ✔ Dashboard warning lights related to electrical systems.
- ✔ Communication errors when a diagnostic scanner is connected.
Solving Issues with Your 2003-2007 Silverado BCM
Don’t let a faulty module keep your truck off the road or in a state of disrepair. This unit is a direct replacement for a wide range of GM trucks and vans, including the Silverado, Sierra, Express, and Savana. We make the replacement process simple. After your purchase, you provide us with your vehicle’s VIN. We then flash the module with the latest, most stable software from GM, ensuring it is perfectly matched to your vehicle’s specific options and configuration. This means no expensive trips to the dealership for programming—it arrives at your door ready for installation.
Installation and Post-Install Considerations
Installation is typically straightforward, with the BCM located under the steering column on most trucks or in the center dash on vans. While our programming handles the majority of the setup, some vehicles may require a couple of simple relearn procedures after the new BCM is installed.
- Airbag System Sync: If your airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure may be needed. This is a quick task for any shop with a professional-grade diagnostic tool.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure proper brake light and traction control operation.
This module is a reliable replacement for multiple part numbers, including: 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. Please verify your part number and consult the detailed fitment list to ensure compatibility.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM acts as the central computer for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, security system, wipers, and more.
How do I know if my BCM is the problem?
Common symptoms include multiple, unrelated electrical issues happening at once. For example, if your power locks, interior lights, and radio all start acting erratically, the BCM is a likely culprit.
What do you mean by ‘VIN Programmed’?
We use your Vehicle Identification Number (VIN) to load the correct factory software and settings onto the BCM before we ship it. This makes the module plug-and-play for your specific vehicle, saving you a trip to the dealer for programming.
Is this part difficult to install?
For someone with basic mechanical skills, the physical installation is straightforward. It’s typically located under the driver’s side dashboard and involves disconnecting the battery and swapping a few electrical connectors.
Will I need special tools after installation?
In some cases, a post-install procedure like an airbag system sync or brake pedal position relearn may be needed. These procedures require a professional diagnostic tool, which most automotive repair shops have.
Does this 2003-2007 Silverado BCM fit other vehicles?
Yes, this BCM has a wide range of compatibility, fitting many 2003-2007 GMC Sierra, Chevy Express, GMC Savana, and even Chevy SSR models. Please refer to our detailed fitment list to confirm it matches your exact vehicle.