If your GM truck or van is starting to feel like it has a mind of its own—with flickering lights, unpredictable power locks, or a security system that randomly immobilizes the engine—you’re likely dealing with a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated issues. Stop chasing electrical gremlins and get the definitive fix with this direct-fit replacement BCM.
This isn’t just a replacement part; it’s a complete solution. We take the biggest headache out of the repair process: programming. Simply provide us with your vehicle’s VIN during checkout, and our technicians will flash this module with the latest GM software specific to your truck or van. This means no expensive trips to the dealership and no special programming tools required on your end. It arrives at your door ready to be installed, saving you time, money, and diagnostic frustration.
A Technician’s Notebook: The Silverado with a Ghost
A 2005 Silverado 1500 came into my bay with a list of bizarre symptoms. The owner said the dome light would flicker while driving, the driver’s side power window would only work sometimes, and twice the truck refused to start, showing only the security light on the dash. He had already replaced the window switch and checked grounds with no luck. A quick scan showed multiple U-codes (communication errors) between modules. This is a classic sign of a corrupted BCM flooding the data bus with garbage information. Instead of a complex wiring job, the fix was simple: a new, correctly programmed BCM. Once installed, all the ghost-like electrical issues vanished instantly. This is why a reliable Programmed GM BCM is often the first and only part you need.
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, this module is the likely solution:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights staying on or not turning on at all.
- ✔ The security or anti-theft light is illuminated, causing a no-start condition.
- ✔ Gauges on the instrument cluster behaving erratically or not working.
- ✔ False warnings on the driver information center (e.g., “Service 4WD”).
- ✔ Diagnostic trouble codes (DTCs) related to communication loss, such as U0140, U0155, or other U-codes.
- ✔ Horn or radio controls working intermittently.
Your Straightforward BCM Installation Guide
Installing your new BCM is a manageable job for a DIY enthusiast. While locations vary slightly, the process is generally the same.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Locate the BCM: On Silverado and Sierra pickups, it’s typically found under the driver’s side of the dashboard, near the steering column. On Express and Savana vans, it’s usually located behind the center dash trim.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that must be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Seat the new, pre-programmed BCM into the mounting bracket and securely plug in all the electrical connectors. You should hear a click as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions: windows, locks, interior lights, radio, and wipers to confirm the repair.
Important Post-Installation Steps
Because this is a new electronic brain for your vehicle, a couple of quick ‘handshake’ procedures may be needed depending on your specific model:
- Airbag System Sync: If the airbag light is on after installation, a professional scan tool is needed to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure brake lights and stability control function correctly. This can also be done with a capable scan tool.
Disclaimer: Vehicle systems vary. Always consult a factory service manual or a qualified technician if you are unsure about any step.
Verified Fitment For Your Vehicle
This Programmed GM BCM is a direct replacement for part number 15194169 and also interchanges with part numbers 15167329, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. It is guaranteed to fit the following models (please check options carefully):
- Chevrolet Silverado 1500/2500/3500 (2003-2007 Classic, exc. Crew Cab)
- GMC Sierra 1500/2500/3500 (2003-2007 Classic, exc. Crew Cab)
- 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 take my truck to the dealer for programming after I install this?
No. This is the biggest benefit of our service. We program the BCM to your vehicle’s specific VIN before we ship it. This saves you the time, cost, and hassle of a dealership visit.
What is a BCM and what does it control?
The Body Control Module (BCM) is a computer that acts as the central command for your vehicle’s electronic accessories. It manages functions like power windows, power locks, interior and exterior lighting, the security system, wipers, and more.
Where is the BCM located on my 2004 Silverado?
On most 2003-2007 Silverado and Sierra pickups, the BCM is located under the driver’s side dashboard, to the left of the steering column. On Express and Savana vans, it is typically behind the radio/climate control panel in the center of the dash.
Is there a core charge for this part?
No, there is no core charge. You can keep your old BCM, so you won’t have to worry about the cost or hassle of shipping it back to us.
Why did my airbag light come on after installing the new BCM?
This can happen because the new BCM needs to be electronically introduced to the vehicle’s Sensing and Diagnostic Module (SDM), which controls the airbags. A professional scan tool is required to perform the “Setup SDM Primary Key in BCM” procedure to sync the two modules and turn off the light.