Restore Peak Performance to Your GM Vehicle
Is your Chevrolet Cavalier, Pontiac Sunfire, or GMC Sonoma suffering from frustrating and unpredictable engine problems? Issues like a persistent check engine light, rough idling, stalling, or a complete no-start condition often point to a failing Powertrain Control Module (PCM). This vital component is the central computer of your vehicle, managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, the entire system can become unreliable. This replacement PCM, part number 16228016, is the definitive solution to get your vehicle running smoothly and dependably again.
This isn’t just a generic, off-the-shelf part. We program this module specifically for your vehicle using the Vehicle Identification Number (VIN) you provide. This critical step ensures that the PCM has the correct software and calibrations for your car’s specific engine, transmission, and options. It’s loaded with the latest GM updates available, which can often resolve factory bugs and improve overall performance and efficiency. By matching the programming to your VIN, we eliminate the guesswork and the need for expensive dealership programming, providing a direct-fit, ready-to-install solution.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with communication-related or random sensor codes.
- ✔ Engine stalls unexpectedly or struggles to start.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough or erratic engine idling and poor acceleration.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Failure to pass emissions testing.
- ✔ Your scan tool cannot communicate with the module.
From the Diagnostic Bay
We had a 1998 Chevy S10 come into the shop with classic signs of a bad PCM: it would crank but not start, and when it did run, it idled terribly. The owner had already replaced the fuel pump and ignition module with no success. Before condemning the computer, we did our due diligence. We checked the main power and ground wires to the PCM connector. Sure enough, we found a corroded ground wire on the engine block, just below the thermostat housing. After cleaning the connection point and re-securing the wire, the truck fired right up and ran perfectly. Always check the simple things first—a solid power and ground supply is essential for any computer to function correctly. A few minutes with a multimeter can save you from replacing a perfectly good part.
Understanding the Importance of a Programmed 1997-1999 Cavalier PCM
In vehicles from this era, the PCM is the brain behind the brawn. It takes in data from dozens of sensors—like the crankshaft position sensor, oxygen sensors, and throttle position sensor—and uses that information to make instantaneous decisions that keep the engine running at its best. A faulty module can misinterpret this data, leading to incorrect fuel mixture, spark timing, and a host of other performance issues. Our professionally programmed 1997-1999 Cavalier PCM ensures all these calculations are performed correctly, restoring the precise factory-intended operation of your vehicle’s powertrain.
This module is a direct replacement for service numbers 16228016, 8162280160, and 16245305. It is essential to verify your part number before ordering to ensure compatibility. The process is simple: place your order, provide us with your VIN, and we handle the complex programming. The module you receive will be ready for installation, often only requiring a simple security or CASE relearn procedure that can be performed without a high-end scan tool. Get back on the road with confidence, knowing your vehicle’s computer has been correctly prepared for your exact application.
Frequently Asked Questions
How does the VIN programming process work?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians use this number to access the official GM database and download the exact software and calibration files for your specific vehicle configuration. We then flash this software onto the module before shipping it to you.
Is this part difficult to install?
The physical installation is typically straightforward. On most compatible vehicles like the Cavalier, Sunfire, and S10, the PCM is located in the engine bay and is held in place by a few bolts. After swapping the module, you may need to perform a security relearn procedure, which involves a series of key cycles. Instructions for this are widely available and do not require special tools.
Will I need to do a CASE relearn?
A Crankshaft Variation Relearn (CASE) may be necessary to sync the new PCM with your engine’s crankshaft position sensor. This procedure helps the PCM detect misfires accurately. While some high-end scan tools can perform it, it’s not always required for the vehicle to run properly. Many local repair shops can perform this service for a minimal fee if needed.
Do I need to send my old PCM back?
No core charge or return is required for this part. You can keep your old module or dispose of it responsibly.
How do I know if this PCM is compatible with my vehicle?
Please check the fitment list provided on this page. The most important step is to match the service number on your current PCM. This part replaces service numbers 16228016, 8162280160, and 16245305. If your number matches, this part is correct for your vehicle.