Is Your Isuzu Hombre Running Rough?
If you’re dealing with a frustrating no-start condition, erratic engine behavior, poor fuel mileage, or a persistent Check Engine Light on your 1998 Isuzu Hombre, a failing Powertrain Control Module (PCM) is often the culprit. Over time, the original electronics can degrade, leading to issues that are impossible to fix with simple tune-ups. This isn’t just an inconvenience; it’s a problem that affects your truck’s reliability and performance. You need a solution that works right out of the box, without expensive trips to a dealership for programming.
The Direct-Fit, Programmed Solution
This is a reliable, tested, and VIN-programmed PCM that serves as the brain for your truck’s engine and transmission. We take a genuine, used OEM unit and flash it with the latest GM-authorized software updates specifically for your vehicle. All you have to do is provide us with your Vehicle Identification Number (VIN) after purchase, and we handle the rest. The module you receive will be a direct, plug-and-play replacement for part number 09355699 and its equivalents.
Real-World Diagnosis: More Than Just a Code
“A customer’s ’98 Chevy C1500, which uses this exact same PCM, came into my shop last month. It had a random misfire on cylinder 3 that wouldn’t go away, even after a new plug, wire, cap, and rotor. The injector tested fine. After scoping the injector signal wire directly at the PCM, we saw the signal was dropping out intermittently. The internal driver circuit inside the original PCM had failed from years of heat cycles. We installed one of our VIN-programmed modules, and the truck has been running perfectly ever since. It’s a classic failure mode for these units.”
Symptoms of a Failing 1998 Isuzu Hombre PCM
If you’re experiencing any of the following, your engine computer is the likely cause:
- ✔ Vehicle will not start or is very hard to start
- ✔ Check Engine Light is on with PCM-related fault codes (e.g., P0601, P0605)
- ✔ Rough idling, stalling, or hesitation during acceleration
- ✔ Noticeable decrease in fuel economy
- ✔ Harsh or incorrect automatic transmission shifting
- ✔ Failure to communicate with a diagnostic scan tool
Plug-and-Play Installation: No Dealer Visit Required
Getting your truck back on the road is straightforward. While professional installation is always recommended, here are the general steps:
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On the 1998 Isuzu Hombre, the PCM is typically found in the engine compartment. For the 4.3L model, it’s often on the driver’s side.
- Disconnect the Old Unit: Carefully unclip and remove the electrical wiring harnesses. Then, unbolt the module from its mounting bracket.
- Install the New PCM: Mount your new, programmed PCM securely. Reconnect the wiring harnesses, ensuring they click firmly into place.
- Reconnect Battery: Re-attach the negative battery terminal.
- Perform Security Relearn (If Necessary): In some cases, a simple security relearn procedure is needed. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine.
Guaranteed Compatibility
This module is a direct replacement for service number 09355699. It is also fully compatible and interchangeable with the following part numbers:
16266645, 16250279, 16258815, 09366810, 9366810, 9355699
This unit fits a wide range of GM trucks and vans from 1998-1999, including the Chevrolet S10, GMC Sonoma, Chevy Blazer, GMC Jimmy, and many full-size trucks and vans. Please verify your original part number matches to ensure perfect fitment.