Restore Your Truck’s Brain and Get Back on the Road
Is your truck or van suddenly acting possessed? Experiencing frustrating issues like random stalling, erratic shifting, a persistent check engine light, or a complete no-start condition? Before you spend a fortune at the dealership, the problem might be simpler and more affordable to fix than you think. The Powertrain Control Module (PCM), or engine computer, is the central command for your vehicle’s engine and transmission. When it fails, it can cause a host of confusing problems. This fully programmed, OEM 1998 Isuzu Hombre PCM is the reliable, cost-effective solution you’ve been looking for.
We take the guesswork and hassle out of the repair. This isn’t just a used part pulled from a yard; it’s a tested, functional OEM computer that we program specifically for your vehicle using your VIN. This means it arrives at your door with the latest GM software updates already installed, ready for a straightforward installation. You get the reliability of an original factory part without the sky-high dealership price tag for the module and the mandatory programming service.
Case Study: A Tricky Diagnosis
I remember a 1999 Chevy Suburban that came into my bay with a complaint of intermittent stalling and harsh shifting, but only after it was fully warmed up. The owner had already replaced the fuel pump and a few sensors with no luck. We scanned it and found no hard codes, just a history of random communication errors. After checking all the wiring and grounds—which is always the first step—we hooked up a scope to the PCM’s power and ground circuits. We found that the voltage regulation inside the module was becoming unstable at higher temperatures. It was a classic case of a failing PCM that was slowly cooking itself. We swapped in a VIN-programmed module just like this one, and the truck ran perfectly. It’s a reminder that a faulty PCM can mimic many other, more common failures.
Is Your Vehicle Showing These Symptoms?
A failing PCM can cause a wide range of issues. If you’re experiencing any of the following, your engine computer could be the culprit. This is especially true if you see diagnostic trouble codes (DTCs) like P0601 or P0606, which point directly to an internal module fault.
- ✔ Check Engine Light is on or flashing
- ✔ Vehicle refuses to start
- ✔ Engine stalls for no reason
- ✔ Poor or inconsistent engine performance
- ✔ Decreased fuel economy
- ✔ Transmission shifting problems (harsh shifts, not shifting)
- ✔ Communication errors with your scan tool
A Straightforward Guide to Installation
One of the biggest benefits of this module is that the programming is already done. This makes the physical swap simple for a DIYer with basic tools. While the exact location varies slightly by model, the process is generally the same.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the PCM: On most of these trucks and vans, the PCM is located in the engine compartment, often on one of the fenders or near the battery.
- Disconnect the Harnesses: Carefully unplug the electrical connectors from the old PCM. There are typically several large multi-pin connectors with locking tabs. Do not force them.
- Remove the Old Module: Unbolt the PCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed PCM onto the bracket and securely plug in all the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect the Battery: Re-attach the negative battery terminal. Your vehicle may require a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your owner’s manual for specifics.
- Start and Verify: Start the engine and let it run. The check engine light should be off, and the vehicle should run smoothly.
Guaranteed Vehicle Compatibility
This PCM is a direct replacement for several part numbers and fits a wide range of popular GM trucks and vans. Please match your original part number or verify your vehicle is on the list below. This unit is compatible with service numbers 09355699, 16266645, 16250279, 16258815, and 09366810.
- Astro / Safari (GMC): 1998
- Blazer S10 / Jimmy S15: 1998 (4.3L)
- Bravada: 1998 (4.3L)
- Cadillac Escalade: 1999
- Chevrolet / GMC 1500, 2500, 3500 Pickup: 1998-1999 (Gasoline engines)
- Envoy: 1998
- Express / Savana 1500, 2500, 3500 Van: 1998-1999 (Gasoline engines)
- Isuzu Hombre: 1998 (4.3L V6)
- S10 / S15 / Sonoma: 1998 (4.3L V6)
- Suburban 1500 / 2500: 1998-1999 (Gasoline engines)
- Tahoe / Yukon: 1998-1999 (Gasoline engines)
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. We use this number to load the correct, factory-approved software and calibrations for your specific vehicle onto the PCM before we ship it. This ensures it works correctly right out of the box.
Is this a new part?
This is a high-quality, tested Original Equipment (OEM) part that has been sourced from a salvaged vehicle. We verify its functionality and then program it to your vehicle, providing OEM reliability at a fraction of the cost of a new module.
Will I need to do anything else after installation?
In most cases, no. Because the unit is pre-programmed, it is designed to be a plug-and-play solution. Some GM vehicles of this era may require a simple security relearn procedure (often called a ‘key-on’ relearn), which you can do yourself in about 15 minutes.
How do I find my current PCM part number?
Your original PCM will have a sticker on it with the service number. It’s crucial to match this number to one of the compatible part numbers listed (e.g., 09355699, 9366810) to ensure you are ordering the correct hardware.