Restore Your Truck’s Brain and End Electrical Frustration
Are you chasing electrical gremlins in your GM truck or van? Flickering lights, a dead instrument cluster, power windows with a mind of their own, or a security light that prevents your vehicle from starting? These aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it goes bad, it can cause a cascade of confusing and frustrating problems. Stop throwing parts at the problem and get the definitive solution.
This is a direct-replacement Body Control Module for a wide range of 2003-2007 GM vehicles, including the popular Silverado, Sierra, Express, and Savana models. The best part? We take the biggest headache out of the repair. Simply provide us with your vehicle’s VIN at checkout, and our technicians will program the module with the latest GM software specifically for your truck or van. It arrives at your door ready to install, saving you a costly trip to the dealership and the high fees associated with programming.
From the Diagnostic Bay: Solving the Silverado Ghost
I had a 2006 Silverado 1500 in my shop last month that was driving the owner crazy. The radio would turn on and off, the dome light would flicker, and sometimes the truck just wouldn’t start—the security light would flash. He’d already replaced the battery and checked the grounds. After hooking up my scan tool, I saw multiple communication loss codes with various modules. This pointed directly to the central hub: the BCM. Instead of a complicated dealer visit, we ordered one of these pre-programmed units. The install took less than an hour, and once we completed the post-install procedures, every single electrical ghost was gone. It’s the most efficient way to handle these common GM issues.
Is Your Truck or Van Showing These Signs?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting (flickering, staying on, or not working at all).
- ✔ A security or anti-theft light that stays on, preventing the engine from starting.
- ✔ Instrument cluster gauges behaving erratically or not working.
- ✔ Radio or climate control malfunctions.
- ✔ False warning messages on the driver information center.
- ✔ Communication error codes (U-codes) when scanned.
Your Straightforward BCM Installation Guide
Installing your new 2003-2007 GM BCM is a manageable job for a confident DIYer. While the exact location varies slightly between trucks (under steering column) and vans (center dash), the process is similar.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On Silverado/Sierra pickups, it’s typically mounted under the driver’s side of the dashboard, near the steering column. On Express/Savana vans, it’s usually behind the center dash trim.
- Remove Trim Panels: Carefully remove any plastic trim panels necessary to access the module. Use a trim removal tool to avoid breaking clips.
- Disconnect and Remove: Unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location. Reconnect all electrical connectors, ensuring they click securely into place.
- Perform Final Steps: Reassemble the dash panels and reconnect the battery. You will now need to perform the necessary post-installation procedures noted below.
Important Final Steps After Installation
To ensure full functionality and safety, a couple of final steps are required after your new BCM is installed. These procedures sync the new module with your vehicle’s other systems.
- Airbag System Reset: If the airbag warning light is on, a scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This is a critical safety step to ensure the airbag system is operational.
- Brake Pedal Position Sensor Relearn: Some vehicles may require the Brake Pedal Position (BPP) sensor to be recalibrated. This ensures the brake lights and stability control systems function correctly.
Note: If you are not comfortable with these final steps or do not have access to a capable diagnostic scan tool, we recommend seeking assistance from a qualified professional mechanic.
Verified Fitment for Your GM Vehicle
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 guaranteed to fit the following models (please check your specific options):
- Chevrolet Silverado 1500/2500/3500 (2003-2007 Classic)
- GMC Sierra 1500/2500/3500 (2003-2007 Classic)
- Chevrolet Express 1500/2500/3500 Van (2003-2007)
- GMC Savana 1500/2500/3500 Van (2003-2007)
- Chevrolet SSR (2003-2006)
Frequently Asked Questions
Do I need to do any programming myself?
No. This BCM comes fully programmed to your vehicle’s specific VIN. You just need to provide us with your 17-digit VIN when you order, and we handle all the programming before shipping it to you.
What is a VIN and where do I find it?
The VIN is your vehicle’s unique 17-digit identification number. You can find it on your driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix my ‘Service 4WD’ message?
While a BCM can cause a variety of issues, a ‘Service 4WD’ message is more commonly related to the Transfer Case Control Module (TCCM), the encoder motor, or the switch in the dash. It’s best to diagnose that issue separately, though a failing BCM can sometimes cause communication errors that trigger other warnings.
Is this a simple plug-and-play installation?
The physical installation is plug-and-play. However, as noted in our description, you will need to perform post-install procedures like the ‘Setup SDM Primary Key’ for the airbag system. This requires a bi-directional scan tool. The core vehicle options will work immediately thanks to our pre-programming.
What if I order and my part number isn’t listed?
This BCM replaces a wide range of part numbers. If your module’s part number is listed in our interchange list (e.g., 15167329, 15194169, etc.), then this unit is the correct replacement, even if the primary part number is 15747545.