Is your Isuzu Hombre, Chevy S10, or Pontiac Grand Am suffering from perplexing issues like stalling, no-start conditions, or a persistent Check Engine Light? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. Don’t let a faulty computer keep you off the road. This direct-fit PCM, part number 16245305, is the reliable, straightforward solution to restore your vehicle’s performance and dependability.
This isn’t just a replacement part; it’s a complete solution. We professionally program each module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures that it communicates perfectly with your vehicle’s systems right out of the box. By using the latest software updates from GM, we ensure your engine operates with optimal efficiency, fuel economy, and emissions control, just as the manufacturer intended. This critical programming step eliminates the need for an expensive trip to the dealership for flashing.
Diagnosing a Faulty 1996-2000 Isuzu Hombre PCM
A failing PCM can manifest in numerous ways, often mimicking other sensor or component failures, which can make diagnosis a frustrating process. If you’re experiencing a combination of the symptoms below, the PCM is a highly likely culprit. This module is also a direct replacement for service numbers 16228016 and 8162280160, commonly found in a wide range of GM vehicles from this era.
From the Diagnostic Bay
We had a 1999 Chevy S10 with the 2.2L engine towed in, and the customer was at his wit’s end. The truck would crank but wouldn’t start, and there was no spark and no fuel injector pulse. He had already replaced the crank sensor, ignition module, and fuel pump. We connected our scanner and couldn’t establish communication with the PCM. After verifying all power and ground connections to the computer were good, we knew the module itself was the problem. We installed one of our pre-programmed PCMs, performed the quick security relearn, and the truck fired up on the first try. It’s a textbook example of how a dead PCM can send you chasing ghosts all over the engine bay.
Common Symptoms of PCM Failure
- ✔ Check Engine Light: The light is on, and you may have communication error codes (U-codes) or codes for multiple unrelated sensors.
- ✔ No-Start or Hard-Start: The engine cranks but refuses to start, or takes an excessively long time to fire up, either hot or cold.
- ✔ Poor Engine Performance: You may notice a significant loss of power, hesitation during acceleration, or rough idling.
- ✔ Reduced Fuel Economy: A failing PCM can’t properly manage the air-fuel mixture, leading to a noticeable drop in MPG.
- ✔ Erratic Shifting: The automatic transmission may shift harshly, at the wrong times, or not at all, as the PCM also controls transmission functions.
- ✔ Stalling: The engine may stall intermittently for no apparent reason, either while driving or at a stop.
- ✔ Failed Emissions Test: Incorrect engine management will almost certainly lead to a failed smog or emissions inspection.
A Simple, Reliable Solution
Replacing your vehicle’s PCM has never been easier. Simply provide us with your VIN during checkout, and our technicians will handle the complex programming. The module you receive will be ready for installation. In most cases, the process is as simple as disconnecting the battery, unplugging the old module, installing the new one, and reconnecting the battery. Some GM vehicles of this era may require a simple security relearn procedure (often called a Passlock relearn), which you can perform yourself in about 30 minutes without any special tools. Instructions are readily available online or we can help guide you.
Frequently Asked Questions
Do I need to send my old PCM in?
No, there is no core charge or need to return your original module. This is a direct purchase.
Is this part difficult to install?
Installation is straightforward for anyone with basic mechanical skills. It typically involves disconnecting the battery and using simple hand tools to swap the module. The most important step is providing the correct VIN for programming.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your vehicle. We use it to load the exact factory software and calibrations for your specific engine, transmission, and options, ensuring perfect compatibility.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. However, it’s always best to have your vehicle scanned for trouble codes to ensure the PCM is the root cause of the problem.
Does this module fit vehicles other than the Isuzu Hombre?
Yes, this PCM is compatible with a wide range of GM vehicles from 1996-2000, including the Chevy S10/Sonoma, Cavalier, Malibu, Pontiac Sunfire/Grand Am, and Oldsmobile Achieva/Skylark with specific engine options. Please verify the part number and check the fitment list.