Restore Peak Performance to Your Vehicle’s Engine
The Powertrain Control Module (PCM), often called the engine computer, is the electronic brain of your 1998 Isuzu Hombre and a wide range of other GM trucks and vans from that era. It meticulously manages critical functions like fuel injection, ignition timing, transmission shifting, and emissions systems. When this vital component begins to fail, it can cause a cascade of confusing and frustrating problems, from a simple check engine light to a vehicle that won’t start at all. This replacement PCM, part number 16266645, is the definitive solution to get your truck or van running reliably again.
This isn’t just a part in a box; it’s a comprehensive service. We take this genuine, used OEM module and program it with the latest official GM software updates specifically for your vehicle. By providing us with your Vehicle Identification Number (VIN) during checkout, you ensure that the computer you receive is a perfect match for your vehicle’s original factory specifications, ensuring seamless communication between all onboard systems.
From the Diagnostic Bay
We had a 1999 Chevy Tahoe in the shop that was driving the owner crazy. It would intermittently stall at red lights, had a rough idle, and the transmission would sometimes shift hard into second gear. The check engine light was on with a mix of seemingly unrelated codes—O2 sensor, random misfire, and a transmission communication error. The owner had already replaced the spark plugs, wires, and even the fuel pump with no success. After checking all the wiring and grounds, we hooked up our high-level scanner and saw that the PCM was dropping data packets intermittently. The internal processor was failing. We sourced a quality used module, programmed it to the Tahoe’s VIN, performed the quick security relearn, and it was like a brand new truck. All the ghost codes vanished, the idle smoothed out, and the shifting was perfect. It’s a classic case of a failing computer creating symptoms that point everywhere else.
Is Your Vehicle Showing These Symptoms?
- ✔ Check Engine Light is illuminated with various, sometimes random, trouble codes.
- ✔ Your engine cranks but refuses to start.
- ✔ Noticeable decrease in fuel economy.
- ✔ The engine stalls unexpectedly, either while driving or at idle.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The vehicle fails an emissions test.
- ✔ General poor engine performance, hesitation, or rough idling.
Why Choose Our Pre-Programmed 1998 Isuzu Hombre PCM?
Finding the right electronic module for an older vehicle can be a challenge. Our solution simplifies the process. We start with a thoroughly inspected, used OEM computer sourced from a salvaged vehicle. This ensures you get a part with the original factory build quality. The most critical step is our in-house programming service. Using your VIN, we flash the module with the correct software, which accounts for your vehicle’s specific engine, transmission, and emissions equipment. This eliminates the need for an expensive trip to the dealership for programming, saving you time and money.
This module is a direct replacement for multiple part numbers, including 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, and 9366810. Please verify your part number and consult the extensive fitment list to confirm compatibility with your specific make, model, and year.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to program the PCM correctly. The VIN contains specific information about your vehicle’s engine size, transmission type, emissions systems, and other factory-installed options. Programming the module with your VIN ensures it works perfectly with your vehicle, just like the original one did.
Is this part difficult to install?
Physically installing the PCM is typically straightforward. It usually involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and then bolting the new one in its place. However, after installation, you will likely need to perform a security relearn procedure (sometimes called a CASE relearn) so the PCM can communicate with your vehicle’s anti-theft system and other components. This procedure is often simple and can be done without special tools.
What is a security relearn procedure?
A security relearn, or Crankshaft Variation Relearn (CASE), synchronizes the new PCM with your vehicle’s security system and crankshaft position sensor. Without it, the vehicle may not start. The most common procedure for these GM vehicles involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. We recommend searching online for the specific procedure for your year and model.
Since this computer is used, is it reliable?
Yes. We source these modules from reputable salvage suppliers. Each unit is visually inspected for damage before being programmed and shipped. Using an original equipment (OEM) part ensures the highest level of compatibility and durability, often exceeding that of aftermarket alternatives.
How can I be sure this fits my truck/van?
The best way to ensure compatibility is to match the part number from your existing module to one of the numbers listed in our description (e.g., 16266645 or 09355699). You can also use the detailed fitment list provided on this page to check your specific make, model, and engine option.