Restore Your GM Truck’s Electronics with a Plug-and-Play BCM
If you’re dealing with bizarre electrical issues in your 2003-2007 GM truck or van—like power windows with a mind of their own, a security light that won’t turn off, or interior lights that flicker for no reason—you’ve likely met the frustrating symptoms of a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen these exact problems hundreds of times. The BCM is the central hub for your vehicle’s body electronics, and when it fails, it can make your reliable workhorse feel haunted. This isn’t just an annoyance; it can affect vehicle security and safety systems.
Forget the expensive trip to the dealership and the high cost of programming. We offer a simple, reliable solution: a high-quality replacement GM BCM 15136224 that arrives at your doorstep fully programmed to your vehicle’s specific VIN. We load it with the latest GM software updates, which often correct the very factory flaws that caused the original unit to fail. This is the most direct and efficient way to get your truck or van back to 100% functionality.
From the Diagnostic Bay: The Case of the Phantom Battery Drain
A customer brought in his 2006 Silverado 2500, completely frustrated. Every few days, he’d find his battery dead. He’d already replaced the battery and the alternator, but the problem persisted. His power door locks were also working intermittently. After connecting my scan tool, I noticed several communication error codes (U-codes) pointing to the BCM. The module wasn’t properly going to ‘sleep’ when the truck was off, causing a slow but steady parasitic draw that drained the battery overnight. Instead of a complex wiring repair, the fix was a new BCM. We installed a pre-programmed unit just like this one, and the phantom drain vanished. It’s a classic example of how a failing GM BCM 15136224 can cause misleading symptoms.
Is Your GM Vehicle Showing These Symptoms?
- ✔ Power windows or door locks operate erratically or not at all.
- ✔ The security or anti-theft light is flashing, and the vehicle may not start.
- ✔ Interior dome lights or dashboard lights flicker or stay on.
- ✔ Windshield wipers turn on by themselves or won’t turn off.
- ✔ The horn honks unexpectedly.
- ✔ Communication error codes (like U0140) are stored in the system.
- ✔ You see a “Service Theft System” or similar message on the driver information center.
Your Straightforward Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On Silverado and Sierra pickups, the BCM is typically located under the driver’s side of the dashboard, near the steering column. On Express and Savana vans, it’s usually found behind the center dash panel.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, remove any bolts or clips holding the module in place.
- ✔ Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical connectors. You should hear a ‘click’ as they lock into place.
- ✔ Reconnect Power: Re-attach the negative battery terminal.
- ✔ Perform Final Checks: Start the vehicle and test all body functions (windows, locks, lights, wipers). Refer to the post-installation procedures below if you encounter any warning lights.
Important Post-Installation Procedures
While this BCM is programmed for your VIN, some vehicle systems may require a ‘handshake’ with the new module. This is normal. Here are the most common procedures that might be necessary:
- Airbag System Sync: If the airbag warning light is on after installation, a professional scan tool is needed to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the airbag system with the new BCM and is only required if the light is illuminated.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light operation and to prevent issues with the traction control system.
Disclaimer: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Verified Vehicle Compatibility
This module, part number 15136224, is a direct replacement for several other part numbers including 15167329, 15194169, 15747545, 15116065, 15198115, 15136876, and 10367689. It fits the following vehicles and options:
- Chevrolet Express 1500/2500/3500 Van (2003-2007) – See specific fitment notes.
- Chevrolet Silverado 1500/2500/3500 Pickup (2003-2007) – Fits ‘Classic’ style for 2007, see notes for cab/transmission exclusions.
- Chevrolet SSR (2003-2006)
- GMC Savana 1500/2500/3500 Van (2003-2007) – See specific fitment notes.
- GMC Sierra 1500/2500/3500 Pickup (2003-2007) – Fits ‘Classic’ style for 2007, see notes for cab/transmission exclusions.
Frequently Asked Questions
Frequently Asked Questions
Do I need to program this BCM?
No. We program the module to your vehicle’s VIN before shipping it. It arrives ready for installation, saving you a trip to the dealer.
What exactly does a Body Control Module do?
The BCM is a computer that controls most of your vehicle’s non-engine-related electronic functions, such as power windows, locks, interior and exterior lighting, wipers, and the security system.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to access the specific factory software and configuration for your exact vehicle. This ensures all features work correctly and that the module communicates properly with other computers in your truck or van.
Is this a difficult part for a DIYer to replace?
For most people with basic tools, this is a very manageable job. The main challenge is accessing the module’s location under the dash. Since our part is pre-programmed, you avoid the most difficult step—the software setup.
What if my airbag light is on after I install it?
This is a known possibility. The airbag system has extra security and may need to be electronically synced to the new BCM using a professional scan tool. This procedure, often called “Setup SDM Primary Key in BCM,” will resolve the light.
Do I have to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.