Restore Peak Performance to Your Vehicle with a VIN-Programmed Engine Computer
Is your Chevrolet Cavalier, S10, or Pontiac Sunfire suddenly giving you trouble? If you’re dealing with a frustrating no-start condition, a persistent Check Engine Light, rough idling, or poor fuel mileage, the heart of the problem is often a failing Powertrain Control Module (PCM). As an experienced technician, I’ve seen countless vehicles sidelined by faulty engine computers. This isn’t just a part; it’s the central command for your engine’s performance and efficiency. We’re here to provide a reliable, straightforward solution that gets you back on the road without the dealership hassle.
This replacement PCM, part number 16228016, is meticulously prepared for your exact vehicle. Before we ship it, we flash it with the latest GM-certified software updates using the Vehicle Identification Number (VIN) you provide. This critical step ensures complete compatibility with your car’s systems, restoring its original factory performance and often correcting drivability issues that older software couldn’t. It’s a direct-fit solution designed for reliability.
Case Study: A Tricky Diagnosis
I remember a ’98 S10 with the 2.2L engine that came into my shop with an intermittent stalling problem that no one could figure out. It would run fine for days, then suddenly die at a stoplight and refuse to restart for an hour. There were no consistent trouble codes, just a history of random communication errors. After checking all the usual suspects—fuel pressure, ignition system, grounds—we decided to test the PCM. On a hunch, we swapped in one of our pre-programmed units. The truck fired up instantly and the problem never returned. The original PCM had an internal thermal fault that only appeared when it got hot, a classic failure mode for these modules. This pre-flashed unit saved the customer hundreds in diagnostic time and got his work truck back in service the same day.
Common Signs of a Failing PCM
If your vehicle’s main computer is on its way out, you’ll likely notice one or more of these issues. A failing module can mimic other problems, but if you’re experiencing several of these symptoms, the PCM is a primary suspect.
- âś” Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- âś” Engine cranks but refuses to start.
- âś” Unexplained drops in fuel economy.
- âś” Rough or unpredictable engine idling.
- âś” Vehicle stalls for no apparent reason.
- âś” Harsh or erratic automatic transmission shifting.
- âś” Failure to pass state emissions testing.
A Straightforward Guide to Your 1997-1999 Cavalier PCM Installation
Replacing the PCM on these GM vehicles is a job most DIYers can handle with basic tools. Following these steps will ensure a smooth installation process. Remember, this unit arrives programmed to your VIN, so no extra steps are needed!
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent any accidental reconnection.
- Locate the PCM: On most Cavaliers, Sunfires, and S10/Sonoma models, the PCM is located in the engine bay on the passenger side, near the firewall or inner fender. It’s a silver metal box with multiple large electrical connectors.
- Disconnect the Harnesses: Carefully unlatch and remove the electrical connectors from the old PCM. These connectors have locking tabs that need to be released. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the mounting hardware that secures the old PCM to its bracket or the vehicle body. Set the old module aside.
- Install the New PCM: Mount your new, pre-programmed PCM in the same location using the original hardware. Ensure it is secure.
- Reconnect Everything: Firmly plug the electrical harnesses back into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn (If Necessary): In many cases, the vehicle will start and run perfectly. Some GM vehicles may require a simple security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult a vehicle-specific guide if your security light is flashing.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 16228016, 8162280160, and 16245305. It is guaranteed to fit the following vehicles with the specified options. Please verify your part number or contact us with your VIN to confirm.
CAVALIER: 1997-1999
GRAND AM: 1997-1998 (2.4L), 1999 (2.4L, ID 16228016)
ISUZU HOMBRE: 1996, 1997-1998 (2.2L), 1999-2000 (2.2L)
MALIBU: 1997-1998 (2.4L), 1999 (2.4L)
S10/S15/SONOMA: 1997-1998 (2.2L), 1999 (2.2L), 2000 (2.2L, VIN 4)
SKYLARK: 1997-1998 (2.4L)
SUNFIRE: 1997-1999
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s 17-digit VIN during checkout, and we will flash the module with the latest GM software for your specific vehicle. It arrives ready to install.
Is this part the same as an ECM or ECU?
Yes. The terms Powertrain Control Module (PCM), Engine Control Module (ECM), and Engine Control Unit (ECU) are often used interchangeably. For these GM vehicles, this module controls both the engine and transmission functions, making PCM the most accurate term.
Where do I find my VIN?
Your VIN can be found on a metal plate on the driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
What if my original part number doesn’t match 16228016 exactly?
This module also replaces service numbers 8162280160 and 16245305. As long as your vehicle is on the compatibility list and your original module has one of these numbers, this part will work. When in doubt, send us your VIN and we can verify fitment for you.
Will I need to perform a security relearn procedure?
It depends on your specific vehicle’s anti-theft system (Passlock/VATS). Many will not require it. If the security light flashes after installation, a simple 10-15 minute key-on procedure is typically all that’s needed to sync the module to your vehicle. This does not require any special tools.