Are you chasing down frustrating electrical gremlins in your GMC Sierra or Chevy Silverado? Intermittent power windows, flickering dash lights, a security system that has a mind of its own, or a no-start condition can often be traced back to a single culprit: 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 truck into a source of constant headaches. This isn’t just an inconvenience; it’s a breakdown of your truck’s central nervous system.
This is your direct-fit, permanent solution. We offer a reliable Body Control Module, part number 09366801, that arrives at your door pre-programmed to your truck’s specific VIN. Forget about expensive dealership visits for programming and diagnostics. Simply provide us with your VIN during checkout, and our experts will flash the module with the latest GM software updates, ensuring it’s ready for installation right out of the box. This is the most efficient way to restore your truck’s electronic functions and get back on the road with confidence.
A Technician’s Notebook
I remember a 2000 Silverado 2500 that came into the shop with a classic case of BCM failure. The owner was at his wit’s end. The radio would turn on and off by itself, the dome light would stay on, and occasionally the truck wouldn’t start, with the ‘Security’ light flashing. We checked grounds and wiring, but all signs pointed to the BCM. The issue with these modules is often internal—corroded solder joints or failing microprocessors. By swapping in a VIN-programmed BCM, we solved all the issues in one go, saving the customer hundreds compared to the dealership’s quote. It’s a common failure point, but thankfully, it’s a straightforward fix with the right part.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need for your 1999-2000 Sierra 2500 BCM problems:
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security system preventing the engine from starting (flashing security light).
- ✔ Gauges on the instrument cluster behaving erratically or not working.
- ✔ Horn sounding randomly or not working when pressed.
- ✔ Communication loss codes (like U-series codes) when scanned with a diagnostic tool.
Your Step-by-Step BCM Replacement Guide
Replacing the BCM is a manageable job for a DIY enthusiast. It’s typically located on the driver’s side, behind the lower dash panel.
- Safety First: Always disconnect the negative terminal from your truck’s battery before working on any electronic components.
- Access the Module: Remove the lower dash panel (knee bolster) below the steering column to expose the BCM. It’s a black box with several multi-pin connectors.
- Disconnect and Remove: Carefully unplug all electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New BCM: Mount your new, pre-programmed BCM onto the bracket and securely plug in all the electrical connectors. Ensure they click into place.
- Reconnect and Test: Reinstall the lower dash panel, reconnect the negative battery terminal, and start the truck. Test all body functions—windows, locks, lights, radio, etc.—to confirm the repair.
Important Post-Installation Notes
While this BCM is programmed for your VIN, some vehicle systems may require a ‘handshake’ with the new module. Please be aware of the following potential procedures:
- Airbag System Sync: If your 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 new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light and traction control operation.
- No Core Charge: You are not required to send your old BCM back to us. There is no core charge associated with this purchase.
Disclaimer: Vehicle systems vary. For procedures specific to your exact model, always consult a factory service manual or a certified automotive technician.
Confirmed Vehicle Compatibility List
This module is a direct replacement for part numbers 19153625, 8191536250, 16257125, 191583625, 8093668010, 8162571250, and 09366801, and is guaranteed to fit the following vehicles:
- 1999-2000 GMC Sierra 1500/2500 Pickup
- 1999-2000 Chevrolet Silverado 1500/2500 Pickup
- 1998-2000 Chevrolet S10 / GMC S15 Sonoma
- 1998-2000 Chevrolet Blazer / GMC Jimmy S15
- 2000 Chevrolet Astro / GMC Safari
- 1999-2000 Isuzu Hombre
- 1998 Oldsmobile Bravada (w/ extended build date opt ZN4)
Frequently Asked Questions
Do I need to get this BCM programmed by a dealer?
No. This BCM comes fully programmed to your vehicle’s VIN before we ship it. It is ready for installation upon arrival. Just provide your VIN at checkout.
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer in your truck that controls non-engine related functions like power windows, locks, lights, the security system, and the instrument panel.
Where is the BCM located on my 1999-2000 Sierra 2500?
On the 1999-2000 Sierra and Silverado models, the BCM is typically located behind the dashboard on the driver’s side, near the steering column.
Is any special tool needed for the installation?
Basic hand tools are all that’s needed for the physical installation. However, in some cases, a professional diagnostic scan tool may be required for post-installation procedures like an airbag system sync or brake pedal position relearn.
What happens if I don’t provide my VIN?
We cannot ship the module without your VIN. The programming process is essential to ensure the BCM works correctly with your truck’s specific options and security system. We will contact you to get the VIN after your purchase.
Is there a core charge for this part?
No, there is absolutely no core charge. You can keep your old, original module.