Restore Control and End Electrical Frustration
If you’re dealing with bizarre electrical issues in your 1999-2000 Isuzu Hombre or a similar GM truck, you know the frustration. One day the dome light won’t turn off, the next your power windows have a mind of their own. As a technician with over two decades of experience, I’ve seen these exact problems countless times. The culprit is almost always a failing Body Control Module (BCM). This isn’t just an inconvenience; it can affect vehicle security and safety systems. This module is the central command for your truck’s body electronics, and when it starts to fail, it creates a cascade of confusing symptoms.
We solve this problem by providing a reliable, fully programmed BCM that is ready for installation right out of the box. Before we ship your part, we use the Vehicle Identification Number (VIN) you provide to flash the module with the latest GM software updates specific to your truck. This critical step ensures seamless communication between the BCM and your vehicle’s other systems, eliminating the need for an expensive trip to the dealership for programming. This is the definitive solution to get your truck’s accessories working correctly again.
A Technician’s Notebook: The Intermittent Gremlin
I remember a 1999 Silverado that came into the shop with a classic “ghost” problem. The owner complained of random dash light flickering and the radio cutting out. He’d already replaced the battery and checked all the main ground connections. Other shops were stumped. After connecting my scan tool, I noticed intermittent communication loss codes (U-codes) pointing to the BCM. We swapped in a pre-programmed BCM, and just like that, 20 years of electrical gremlins vanished. It’s rarely the component you see; it’s the computer you don’t.
Common Signs of a Failing BCM
- ✔ Erratic or non-functional interior/exterior lights (headlights, dome lights, dash lights).
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security system engaging randomly or the horn sounding without reason.
- ✔ A persistent “Service Vehicle Soon” or security light on the dashboard.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss, such as U0140, or specific body circuit faults.
- ✔ Inconsistent or failed remote keyless entry (RKE) operation.
Your Straightforward BCM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On your 1999-2000 Isuzu Hombre, the BCM is typically located on the left-hand (driver’s) side of the dashboard. On other compatible models like the S10/Blazer, it may be in the center dash area.
- ✔ Remove Trim Panels: Carefully remove any lower dash panels or trim necessary to access the module. These are usually held by clips or a few screws.
- ✔ Unplug and Unbolt: Disconnect the electrical connectors from the old BCM. Press the release tabs firmly. Then, remove the bolts or nuts holding the module to its bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in place and secure it. Reconnect all electrical connectors, ensuring they click securely into place.
- ✔ Reconnect and Test: Reinstall any trim panels you removed. Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, locks, windows, etc.
Verified Vehicle Compatibility
This Body Control Module is a direct fit for the following vehicles. Please match your original part number or vehicle to ensure compatibility. This module replaces part numbers: 19153625, 8191536250, 16257125, 191583625, 8093668010, 8162571250, and 09366801.
- ✔ 1999-2000 Isuzu Hombre (LH dash)
- ✔ 1998-2000 S10/S15/Sonoma (center dash, ID 16257125)
- ✔ 1998-2000 Blazer S10/Jimmy S15 (center dash, ID 16257125)
- ✔ 1999-2000 Silverado & Sierra 1500/2500 (LH dash)
- ✔ 2000 Astro & Safari (GMC) (LH dash)
- ✔ 1998 Bravada (center dash, w/extended build date opt ZN4)
Important Post-Installation Note: In some cases, additional steps may be needed. If your airbag light is on, a professional scan tool is required for the ‘Setup SDM Primary Key in BCM’ procedure. A Brake Pedal Position Relearn might also be necessary on certain models. Always consult a factory service manual for vehicle-specific details.
Frequently Asked Questions
Do I need to send my old BCM back?
No. There is no core charge for this part. You can keep your original module.
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship the module until we receive this information.
What if my airbag light comes on after installation?
This indicates the new BCM needs to be synced with the airbag system’s Sensing and Diagnostic Module (SDM). A professional-grade scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is this a difficult part for a DIYer to install?
For most DIYers with basic tools, this is a manageable job. The main challenge is accessing the module’s location behind the dashboard. Since our BCM comes pre-programmed, you avoid the most complex part of the repair.
Will this fix my power window and lock problems?
Yes, the BCM directly controls the power windows, door locks, interior lighting, and other accessories. If the module is the source of the fault, replacing it with our programmed unit is the correct fix.