Restore Your Truck’s Brain and End Electrical Frustrations
If you’re dealing with bizarre electrical problems in your 2003-2007 GM truck or van—like power windows with a mind of their own, flickering interior lights, or a security system that won’t cooperate—the Body Control Module (BCM) is almost always the culprit. As the central command center for your vehicle’s body electronics, a failing BCM can turn your reliable workhorse into a source of daily headaches. This isn’t just an inconvenience; it can affect vehicle security and safety systems. I’ve seen it countless times in the shop: what seems like multiple, unrelated electrical failures often traces back to a single, faulty BCM.
We offer a straightforward, reliable solution. This Body Control Module, compatible with part number 15136876 and others, arrives at your door pre-programmed to your vehicle’s specific VIN. This means you can skip the expensive trip to the dealership and the hassle of scheduling a programming appointment. We handle the complex part so you can focus on the simple installation. Just provide your VIN at checkout, and we’ll flash the module with the latest GM software, ensuring it’s ready to install right out of the box.
From the Diagnostic Bay: The Case of the Phantom Drain
A customer brought in his ’05 Silverado 2500 with a battery that would be dead every morning. He’d already replaced the battery and the alternator, but the problem persisted. After hooking up my multimeter to check for a parasitic draw, I saw a significant amperage pull even with the key off. By pulling fuses one by one, I isolated the draw to the BCM circuit. The internal circuits of the original BCM had failed, preventing it from properly entering its ‘sleep’ mode. This caused the interior lights and other small components to stay active, draining the battery overnight. Replacing the faulty module with a correctly programmed 2003-2007 Sierra BCM solved the mystery and got his truck starting reliably again.
Is Your GM Vehicle Showing These Signs?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that flicker, stay on, or don’t work at all.
- ✔ The security system or keyless entry failing to operate correctly (may trigger U-series communication codes).
- ✔ The radio or instrument cluster displays acting strangely.
- ✔ A persistent battery drain that kills your battery overnight.
- ✔ Horn honking randomly or not working when pressed.
Your Straightforward BCM Installation Guide
Installing your new BCM is a manageable task for a DIY enthusiast. While the exact location is under the steering column for trucks and in the center dash for vans, the process is similar. Always have your vehicle’s service manual for reference.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes before starting work.
- Locate the BCM: On Sierra and Silverado pickups, remove the lower dash panel beneath the steering wheel to access the module. On Express and Savana vans, you’ll typically access it through the center dash area.
- 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 Module: Mount the new, pre-programmed BCM in the same location and securely reconnect all electrical harnesses. Ensure they click into place.
- Reconnect and Test: Reassemble your dash panels and reconnect the negative battery terminal. Start the vehicle and test all body functions—lights, windows, locks, etc.
- Perform Relearns (If Needed): In some cases, you may need a professional scan tool to perform a ‘Brake Pedal Position Relearn’ or an ‘Airbag System Sync’ if related warning lights appear. This is not always required but is a possibility.
Verified Fitment for Your GM Truck or Van
This module is a direct-fit replacement for a wide range of GM vehicles. We guarantee compatibility if your original part number is listed below and your vehicle is included in the fitment list. This part replaces: 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, 10367689.
Fits select models of:
- 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)
Note: Please check the detailed fitment data in the original listing to confirm compatibility with your specific options (e.g., cab type, transmission). A properly functioning 2003-2007 Sierra BCM is essential for these vehicles.
Frequently Asked Questions
Do I need to program this BCM?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you a trip to the dealer.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to load the exact software and settings your truck or van had from the factory, ensuring all its specific features work correctly.
What is a Body Control Module (BCM)?
The BCM is a computer that manages your vehicle’s non-engine related electronics. This includes power windows, locks, lights, the security system, horn, and more.
Is there a core charge for my old part?
No, there is no core charge. You can keep your original module.
What if my airbag light is on after installation?
This can happen occasionally. It means the new BCM needs to be synced with the airbag system. A technician with a professional scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve it.
Where is the BCM located on my 2005 Sierra 1500?
On 2003-2007 Classic Sierra and Silverado pickups, the BCM is located under the driver’s side dashboard, to the left of the steering column.