Is Your GM Vehicle Running Rough? The PCM Might Be the Culprit.
If you’re experiencing frustrating issues like a persistent check engine light, erratic engine behavior, poor fuel economy, or even a no-start condition in your 1997-1999 Chevrolet Cavalier, Pontiac Sunfire, or other compatible GM vehicle, a failing Powertrain Control Module (PCM) is a very likely cause. The PCM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, the symptoms can be widespread and difficult to diagnose, but replacing it is often the definitive solution.
This replacement PCM, part number 16245305, is a direct-fit solution designed to restore your vehicle’s factory performance and reliability. We take the guesswork out of the repair by pre-programming the module specifically for your car using the Vehicle Identification Number (VIN) you provide. This ensures that all parameters match your vehicle’s original specifications, including engine size, transmission type, and emissions equipment. The module arrives ready for installation, getting you back on the road faster.
From the Diagnostic Bay
I remember a 1998 S10 pickup that came in with a whole list of intermittent problems: stalling at lights, hard starting, and a check engine light with a dozen random codes. The owner had already replaced the spark plugs, wires, and even the fuel pump with no success. All signs pointed to a faulty PCM. Before ordering a new one, I did my due diligence and checked the main PCM ground wire on the engine block. Sure enough, it was corroded and barely making contact. After cleaning the connection point and tightening the bolt, every single issue disappeared. It’s a powerful reminder: before condemning a major component, always verify the simple things like power and ground connections. It can save you hundreds of dollars.
Why Choose Our Programmed 1997-1999 Cavalier PCM?
Finding the right computer for an older vehicle can be a challenge. Our service simplifies the process. This module is a dependable replacement for a wide range of GM cars and trucks from the late 90s, including the 2.2L and 2.4L engines found in the Cavalier, Sunfire, S10/Sonoma, Malibu, and more. By programming it with the latest GM-sourced software updates for your specific VIN, we help correct known factory issues and ensure optimal performance. This isn’t just a replacement part; it’s a restoration of your vehicle’s core operational logic.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) on the dashboard.
- ✔ Engine stalling, stumbling, or misfiring.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass state emissions tests.
- ✔ Communication errors with diagnostic scan tools.
Guaranteed Compatibility and Simple Installation
This PCM is a direct replacement for service numbers 16245305, 16228016, and 8162280160. Please verify the part number on your original module to confirm fitment. Installation is straightforward for a DIY mechanic or any professional technician. Simply disconnect the battery, locate your old PCM (often in the engine bay or under the dashboard), unplug the wiring harnesses, unbolt the old unit, and install the new one in its place. Once installed, some vehicles may require a simple security relearn procedure (often called a CASE learn or anti-theft relearn), which can typically be done without special tools. Instructions for this procedure are widely available online for your specific model.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls the engine and transmission functions by reading data from various sensors and making real-time adjustments to things like fuel delivery, spark timing, and gear shifts to ensure optimal performance, fuel economy, and emissions.
Do I need to have this PCM programmed?
No, we handle the programming for you before shipment. You must provide us with your vehicle’s 17-digit VIN after purchase. We will flash the module with the correct software for your specific vehicle, making it a plug-and-play installation.
How do I find my vehicle’s VIN?
Your VIN can be found on a metal plate on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will any other procedures be needed after I install it?
In many cases, you can simply install the module and start the vehicle. However, some GM vehicles of this era require a security relearn or Crankshaft Variation (CASE) relearn procedure to sync the new PCM with the vehicle’s anti-theft system and crankshaft position sensor. This can often be done without special tools and instructions are readily available online.
How can I be sure this part will fit my vehicle?
This module fits a wide range of vehicles listed in the compatibility chart. The best way to ensure a perfect match is to compare the service number on your current PCM to the numbers listed here (16245305, 16228016, 8162280160). Providing your VIN for programming also allows us to double-check compatibility.