Tired of Chasing Electrical Gremlins in Your Truck?
As a technician with over two decades of experience under the hood, I’ve seen it all. One of the most frustrating issues for any vehicle owner is unpredictable electrical problems. One day the power windows work, the next they don’t. The security light flashes for no reason, or the interior lights have a mind of their own. If this sounds familiar, the culprit is very likely a failing Body Control Module (BCM). This isn’t just an inconvenience; it can affect your vehicle’s security and basic functions. This is the central command for your truck’s comfort and convenience features, and when it fails, it creates chaos.
This isn’t just a replacement part; it’s a direct solution. We take the biggest hassle out of the repair by programming this BCM specifically to your truck’s Vehicle Identification Number (VIN) before we ship it. This means no expensive trips to the dealership for programming, no special tools required for setup. You get a BCM loaded with the latest GM software updates, ensuring optimal performance and reliability for your 1999-2000 Isuzu Hombre BCM and other compatible GM vehicles.
Case Study: The Ghost in the Machine
I remember a customer with a 2000 Chevy S10 (which uses this exact BCM) who was at his wit’s end. His driver-side power window worked intermittently. He had already replaced the window motor and the switch, spending hundreds of dollars with no success. When he brought it to my shop, we didn’t even pick up a wrench at first. We scanned for codes and found communication errors with the BCM. A quick check of the data stream showed the BCM wasn’t registering the switch command consistently. We swapped in a programmed BCM, and the problem was solved in 15 minutes. It’s a classic case where the central ‘brain’ was the issue, not the individual components.
Is Your Truck Showing These BCM Failure Symptoms?
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ The security or anti-theft light stays on or flashes, preventing the engine from starting.
- ✔ Interior dome lights or dashboard lights flicker or fail to turn on/off correctly.
- ✔ The horn honks unexpectedly or doesn’t work at all.
- ✔ Remote keyless entry stops working.
- ✔ Communication-related Diagnostic Trouble Codes (DTCs), often in the ‘U’ series (e.g., U0140).
A Straightforward Guide to BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- ✔ Locate the BCM: On most compatible models like the Isuzu Hombre or S10/Sonoma, the BCM is located under the dashboard, typically on the driver’s or passenger’s side, or near the center console. It’s a plastic box with several large electrical connectors.
- ✔ Disconnect and Remove: Carefully unplug all wire harness connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, ensuring each one clicks into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all related functions: windows, locks, interior lights, etc.
Important Post-Installation Information
While this module is programmed for a direct fit, some vehicle systems may require a ‘handshake’ after installation. Please be aware of the following potential procedures:
- Airbag System Sync: If your airbag warning light is illuminated 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 brake lights and traction control function as intended.
Disclaimer: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Verified Vehicle Compatibility
This BCM is a direct replacement for part numbers 19153625, 8191536250, 16257125, 191583625, 8093668010, 8162571250, and 09366801. It fits the following vehicles:
- 1999-2000 Isuzu Hombre (LH dash)
- 1998-2000 Chevy S10 / GMC Sonoma (center dash, ID 16257125)
- 1998-2000 Chevy Blazer S10 / GMC Jimmy S15 (center dash, ID 16257125)
- 1999-2000 Chevy Silverado & GMC Sierra 1500/2500 (LH dash)
- 2000 Chevy Astro / GMC Safari (LH dash)
- 1998 Oldsmobile Bravada (center dash, w/extended build date opt ZN4)
Frequently Asked Questions
Do I need to program this BCM?
No. We handle all the programming for you before shipping. Just provide your vehicle’s VIN during or after checkout, and it will arrive ready to install.
What does a Body Control Module do?
The BCM acts as the central computer for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, interior lighting, the security system, and wipers.
Where is the BCM located on my 1999 Isuzu Hombre?
On the 1999-2000 Isuzu Hombre and similar GM trucks like the S10, the BCM is typically found under the dashboard on the driver’s side (LH dash).
Is there a core charge?
No, there is no core charge for this part. You can keep your old module, so there’s no need to worry about return shipping.
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 mechanic with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.