Are you chasing frustrating electrical gremlins in your 1999-2000 Isuzu Hombre or GM truck? Intermittent power windows, door locks with a mind of their own, a security light that won’t turn off, or a vehicle that refuses to start can often be traced back to one component: a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, when the BCM falters, it can cause a cascade of confusing and unpredictable issues. This isn’t just an annoyance; it can affect the daily usability and security of your truck.
This replacement BCM is the definitive solution. We take the guesswork and high costs out of the repair by programming the module to your vehicle’s specific VIN before it ships. This means you get a part that is ready for installation right out of the box, saving you from expensive dealership programming fees and vehicle downtime. Restore your truck’s functionality and peace of mind with a reliable, plug-and-play fix.
From the Diagnostic Bay
I remember a 2000 Chevy S10 that came into my shop with a classic case of BCM failure. The owner was at his wit’s end. The radio would turn on and off randomly, the dome light flickered like a strobe, and the PASSLOCK security light was always on, sometimes preventing the truck from starting. He had already replaced the battery and checked every fuse three times. After hooking up my scan tool, I saw communication errors with the BCM. These modules, especially on this GM platform, are notorious for failing due to cold solder joints on the internal circuit board. After years of heat cycles and vibrations, the connections crack. We swapped in a pre-programmed BCM like this one, and every single electrical issue was resolved instantly. It’s a common failure I’ve diagnosed hundreds of times.
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 the likely culprit:
- ✔ Erratic or non-functional power windows and door locks
- ✔ Interior lights staying on or not working at all
- ✔ The security or anti-theft light is illuminated on the dash
- ✔ Intermittent no-start conditions related to the security system
- ✔ Gauges on the instrument cluster behaving erratically
- ✔ Horn not working or sounding randomly
- ✔ Communication DTCs (Diagnostic Trouble Codes) like U-series codes stored in other modules
Your Straightforward Installation Guide
Installing your new BCM is a manageable job for a DIYer with basic tools. While the exact location can vary slightly, here is a general guide for your 1999-2000 Isuzu Hombre:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On the Isuzu Hombre and similar GM trucks, the BCM is typically located under the driver’s side of the dashboard, to the left of the steering column. You may need to remove a lower dash panel for access.
- Disconnect the Old Module: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be pressed to release them. Do not force them.
- Swap the Modules: Unbolt or unclip the old BCM from its mounting bracket and install the new module in its place.
- Reconnect and Power Up: Securely plug the electrical connectors into your new, pre-programmed BCM. Reconnect the negative battery terminal.
- Perform Final Steps: Turn the key to the ‘ON’ position and test all functions (windows, locks, lights). Note the post-installation procedures below, as some may be required.
Post-Installation Requirements
Because this BCM is pre-programmed, most functions will work immediately. However, depending on your specific vehicle, you may need to perform one of the following procedures if you notice a related warning light:
- Airbag System Sync: If the airbag warning light is on after installation, the BCM and the airbag system (SDM) need to be synced. This requires a professional-grade scan tool to perform the ‘Setup SDM Primary Key in BCM’ function.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light operation and traction control functionality.
Disclaimer: Vehicle systems can vary. We always recommend consulting a factory service manual or a qualified technician for procedures specific to your vehicle.
Verified Vehicle Compatibility
This Body Control Module is a direct replacement for units with part number 16257125 and other interchangeable numbers listed below. It is guaranteed to fit the following vehicles:
- 1999-2000 Isuzu Hombre (LH dash)
- 1998-2000 Chevy S10 / GMC Sonoma (center dash)
- 1998-2000 Chevy Blazer S10 / GMC Jimmy S15 (center dash)
- 1999-2000 Chevy Silverado & GMC Sierra 1500/2500 (LH dash)
- 2000 Chevy Astro / GMC Safari (LH dash)
- 1998 Oldsmobile Bravada (center dash, w/ opt ZN4)
Replaces Part Numbers: 19153625, 8191536250, 16257125, 191583625, 8093668010, 8162571250, 09366801
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. The main benefit of our service is that we program the module to your vehicle’s VIN before we ship it. It arrives ready to install, saving you time and money.
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship the part until we receive this information.
Where is the BCM located on my 2000 Isuzu Hombre?
The BCM is typically found under the dashboard on the driver’s side, often to the left of the steering column. You may need to remove a plastic kick panel to see it.
What if my airbag light comes on after I install it?
This can happen occasionally. It means the new BCM needs to be electronically ‘introduced’ to the airbag module. A repair shop with a professional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is there a core charge for this part?
No, there is absolutely no core charge. You can keep your original module without needing to send it back.
Will this fix my power windows that don’t work?
If the BCM is the root cause of the failure, then yes, this part will restore power window function. The BCM directly controls these and many other electronic body accessories.