Restore Peak Performance to Your Truck’s Engine
Is your truck running rough, stalling unexpectedly, or showing a persistent Check Engine Light? These are common signs that the brain of your engine, the Powertrain Control Module (PCM), is failing. A faulty PCM can cause a cascade of frustrating issues, from poor fuel economy to a complete no-start condition. This replacement Powertrain Control Module, part number 16266645 (interchangeable with 09355699 and others), is the definitive solution to restore your vehicle’s reliability and drivability.
This isn’t just a part off a shelf. We take a genuine, used OEM module and program it specifically for your vehicle using your unique Vehicle Identification Number (VIN). This critical step ensures that the computer is perfectly matched to your truck’s engine, transmission, and specific options. We also flash it with the latest software updates from GM, which can correct underlying drivability issues you might not have even known were software-related. This process eliminates the need for an expensive trip to the dealership for programming.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) that won’t clear, or illuminates intermittently.
- ✔ Engine stumbling, misfiring, or running rough.
- ✔ Unexplained drop in fuel mileage.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The vehicle cranks but refuses to start.
- ✔ Loss of communication with the OBD-II port, preventing diagnostics.
- ✔ Stalling for no apparent reason, either while driving or at idle.
From the Diagnostic Bay
We had a 1999 Chevy S-10 in the shop that was a real head-scratcher. The owner had replaced the plugs, wires, and even the fuel pump, but it still had a random, intermittent misfire and would occasionally stall at red lights. The codes were all over the place. After hours of chasing wires, we decided to check the PCM. On a hunch, we swapped in a pre-programmed module matched to the truck’s VIN. The engine fired up instantly, idled smooth as silk, and all the problems vanished. It’s a powerful reminder that when the engine’s ‘brain’ isn’t healthy, nothing else will work right.
The Critical Role of a Programmed 1998 Isuzu Hombre PCM
The 1998 Isuzu Hombre PCM is more than just a component; it’s the central command center for your entire powertrain. It precisely controls fuel injection, ignition timing, transmission shift points, and emissions systems. When you order from us, you’re not just getting a replacement part; you’re getting a fully prepared solution. By providing your VIN, you allow us to configure the module to the exact specifications of your truck, ensuring all systems operate in harmony as the manufacturer intended. This is the key to a successful and lasting repair.
Wide-Ranging GM Compatibility
While this is a perfect fit for the Isuzu Hombre, this versatile module (service ID 09355699) was a workhorse for General Motors. It is also the correct computer for a vast range of popular 1998-1999 GM trucks, vans, and SUVs, including:
- Chevrolet & GMC C/K 1500, 2500, 3500 Pickups
- Chevrolet Tahoe & GMC Yukon
- Chevrolet Suburban
- Cadillac Escalade
- Chevrolet Express & GMC Savana Vans
- Chevrolet S-10, Blazer & GMC Sonoma, Jimmy
- Oldsmobile Bravada
Please verify your part number or consult the detailed fitment list to confirm compatibility with your specific vehicle.
Installation Process
Replacing the PCM is a straightforward process. Always disconnect the negative battery terminal before beginning. Locate your existing module, disconnect the wiring harnesses, unbolt it, and install the new one in its place. Reconnect the harnesses and the battery. In many cases, the vehicle will start and run perfectly. However, due to the GM VATS or Passlock security systems, you may need to perform a simple security relearn procedure. This can typically be done in your driveway without any special tools and takes about 30 minutes.
Frequently Asked Questions
What information do I need to provide for programming?
After you place your order, you must provide us with your vehicle’s 17-digit VIN. This is essential for us to load the correct software and ensure compatibility.
Is this a new part?
No, this is a thoroughly tested, genuine OEM part sourced from a salvaged vehicle. We guarantee its functionality and program it with the newest software available for your VIN.
Will I need to do anything after I install it?
While the module is programmed for your engine and transmission, you may need to perform a security relearn procedure (often called a ’10-minute relearn’) to sync the module with your vehicle’s anti-theft system. This is a simple procedure you can do yourself.
How can I be sure my PCM is the problem?
The symptoms listed above are strong indicators of a failing PCM. However, they can also be caused by other issues. It’s always best to have a qualified mechanic perform a full diagnostic check to confirm the PCM is the root cause before ordering.
Where is the PCM located on my truck?
On most of these GM trucks and vans, the PCM is located in the engine compartment, typically on the driver’s side fender well or near the battery.