Restore Your GM Truck or Van’s Electrical Brain
Are you chasing electrical gremlins in your GM truck or van? Flickering lights, power windows with a mind of their own, or a security light that won’t turn off are classic signs of a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen how a faulty BCM can turn a reliable workhorse into a source of daily frustration. The BCM is the central command for your vehicle’s body electronics, and when it fails, chaos ensues. This isn’t just an inconvenience; it can affect vehicle security and safety systems.
We offer a straightforward, reliable solution. This Body Control Module is a direct replacement for part number 15136224 and several other interchangeable numbers. The best part? We handle the programming for you. Simply provide your vehicle’s VIN at checkout, and our experts will flash the module with the latest GM software specific to your truck or van. It arrives at your door ready for installation, saving you a costly trip to the dealership and hours of diagnostic headaches. This is the most efficient way to get your vehicle’s essential functions back online.
From the Diagnostic Bay
Just last month, a 2006 Silverado 2500 was towed into my shop. The owner was at his wit’s end. The dome lights would stay on, the radio would randomly shut off, and sometimes the truck wouldn’t start, showing only a ‘Security’ light on the dash. He’d already replaced the battery and checked fuses. After connecting my scan tool, I saw multiple communication loss codes with the BCM. A quick check of the power and ground pins at the module confirmed the BCM itself was the culprit. We installed one of our pre-programmed units, and within an hour, every single issue was resolved. It’s a common failure, and this is the definitive fix.
Is Your GM Truck or Van Showing These Signs?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, it’s highly likely your BCM is the root cause:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The security or anti-theft system light is illuminated, preventing the engine from starting.
- ✔ Inconsistent or dead instrument panel gauges.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Communication error codes (U-codes) when scanned with a diagnostic tool.
Your Straightforward BCM Installation Guide
Replacing the BCM is a manageable job for a DIYer with basic tools. While the exact location varies between trucks and vans, the process is similar. Remember to follow the post-installation steps for full functionality.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow all systems to power down.
- Locate the BCM: On Silverado and Sierra pickups, it’s typically found under the driver’s side of the steering column. On Express and Savana vans, it’s located in the center of the dash. You may need to remove a lower dash panel for access.
- 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 from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical harnesses. Ensure they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Post-Installation Procedures: After installation, two critical relearn procedures are often required. You will need a capable bi-directional scan tool. First, perform the ‘Setup SDM Primary Key in BCM’ to clear any airbag faults. Second, if applicable, perform the ‘Brake Pedal Position Sensor Relearn’ to ensure proper brake light and cruise control operation.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for part numbers 15136224, 15167329, 15194169, 15747545, 15116065, 15198115, 15136876, and 10367689. It is guaranteed to fit the following models, but please verify your specific options:
- Chevrolet Silverado 1500/2500/3500 (2003-2007, see fitment data for specific cab/transmission exclusions)
- GMC Sierra 1500/2500/3500 (2003-2007, see fitment data for specific cab/transmission exclusions)
- Chevrolet Express 1500/2500/3500 Van (2003-2007, see fitment data for package exclusions)
- GMC Savana 1500/2500/3500 Van (2003-2007, see fitment data for package exclusions)
- Chevrolet SSR (2003-2006)
Note: This is a complex part. Please double-check the provided fitment list or contact us with your VIN to confirm compatibility before ordering.
Frequently Asked Questions about the 2003-2007 GM BCM
Do I really need to provide my VIN?
Yes, absolutely. Providing your VIN is critical. We use it to program the BCM with the correct software and settings for your vehicle’s specific options (like power seats, keyless entry, etc.). This ensures everything works correctly right out of the box.
Will this fix my ‘Security’ light and no-start problem?
In most cases, yes. A faulty BCM is the most common cause of a persistent security light and related no-start condition on these GM vehicles. This pre-programmed module restores the proper communication between your key’s transponder and the vehicle’s security system.
What tools are needed for the post-installation procedures?
You will need a professional-grade, bi-directional scan tool. Basic code readers cannot perform the necessary ‘Setup SDM Primary Key’ or ‘Brake Pedal Position Sensor Relearn’ functions. Many local repair shops can perform these relearns for you if you don’t have the tool.
Is this a plug-and-play part?
It is ‘plug-and-program-and-play’. Because we program it to your VIN before shipping, it eliminates the need for dealer programming. However, you must perform the vehicle-side relearn procedures mentioned (Airbag and Brake Sensor) for full functionality and to clear related warning lights.
Where is the BCM located on my 2005 Sierra?
On 2003-2007 Sierra and Silverado pickups, the BCM is located under the driver’s side dashboard, typically attached to a bracket near the steering column. You will likely need to remove the lower knee bolster panel to access it.