Is Your Isuzu Hombre Running Rough, Stalling, or Refusing to Start?
As a mechanic with over two decades of experience under the hood, I’ve seen countless trucks from this era come into the shop with frustrating electronic gremlins. A bad Powertrain Control Module (PCM) can mimic a dozen other problems, leading to wasted time and money on parts you don’t need. If your 1998 Isuzu Hombre is suffering from erratic behavior like poor fuel economy, harsh shifting, a persistent check engine light, or intermittent no-start conditions, the brain of your engine management system could be the culprit.
This isn’t just a replacement part; it’s a direct solution. We are offering a reliable, tested, and pre-owned OEM Powertrain Control Module, service ID 09355699, which is a direct replacement for part number 16258815. The most significant benefit? We flash it with the latest GM-authorized software specifically for your truck using the VIN you provide. This eliminates the need for expensive dealership programming and ensures a seamless installation process.
A Real-World Scenario: The Phantom Misfire
“A customer’s ’98 GMC Sonoma with the 4.3L, a cousin to your Hombre, came in last month with a random misfire code that just wouldn’t quit. They had already replaced plugs, wires, the cap, and the rotor. The problem persisted. After confirming fuel pressure and spark were good, we hooked up our scope to the injector drivers at the PCM. We found the signal for cylinder 3 was dropping out intermittently. A new, properly programmed PCM like this one solved the issue instantly. It wasn’t a mechanical failure, but a logic failure inside the old computer.”
Key Features of This Engine Computer:
- โ VIN-Programmed for You: We load your vehicle’s specific information and the newest software updates onto the module before it ships.
- โ Plug-and-Play Solution: Because it’s pre-programmed, this module is ready to install right out of the box, saving you a trip to the dealer.
- โ Cost-Effective Repair: Get your truck back to factory-spec performance without the high cost of a brand-new module.
- โ Broad Compatibility: This unit, identified by service ID 09355699, is a direct replacement for a wide range of GM trucks and vans from 1998-1999.
Easy Installation Guide for Your 1998 Isuzu Hombre PCM
Replacing the PCM on these trucks is a straightforward job you can do in your own driveway. Follow these steps for a successful installation:
- Safety First: Always disconnect the negative terminal from your truck’s battery and wait about 10 minutes to ensure all capacitors in the system are discharged.
- Locate the PCM: On the Isuzu Hombre and its GM counterparts (S-10, Sonoma), the PCM is typically located in the engine compartment, often on the driver’s or passenger’s side fender well, housed in a black plastic bracket.
- Disconnect the Harnesses: The PCM has several multi-pin connectors. They have locking tabs that need to be released. Carefully unclip and pull the connectors straight out. Avoid wiggling them side-to-side, as this can damage the pins.
- Swap the Module: Unbolt the old PCM from its mounting bracket. Place the new, programmed module into the bracket and secure it.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new PCM until they click into place. Reconnect your negative battery terminal.
- Final Check: Turn the key to the ‘On’ position (without starting the engine) for 10-15 seconds. This allows the other modules in the vehicle to recognize the new PCM. Then, start your engine. Your check engine light should be off, and your truck should run smoothly.
Guaranteed Fitment and Part Number Verification
To ensure this is the correct part, please match your existing module’s part number or service ID. This computer is a direct replacement for the following part numbers:
09355699, 16266645, 9355699, 16250279, 16258815, 09366810, 9366810
This module fits a wide variety of GM vehicles, including the Chevrolet S10, GMC Sonoma, Chevrolet Blazer, GMC Jimmy, Chevrolet Astro, GMC Safari, and many full-size trucks and vans from Chevrolet and GMC. Providing your VIN is the final step to guarantee a perfect electronic match.