Restore Peak Performance to Your 1997 GM Vehicle
Is your Oldsmobile, Pontiac, or Chevrolet suffering from frustrating drivability issues? A failing Powertrain Control Module (PCM), or ECM, is often the hidden cause behind problems like intermittent stalling, poor fuel economy, erratic shifting, or a persistent check engine light. As a technician with over 20 years of experience, I’ve seen how a faulty computer can turn a reliable car into a source of constant headaches. This replacement Powertrain Control Module is the definitive solution to get your vehicle running smoothly and efficiently again.
This isn’t just a part in a box. We take the hassle out of the repair by programming this module specifically for your vehicle using your VIN. It arrives loaded with the latest GM software updates, ensuring optimal engine and transmission performance. This critical step means you can skip the expensive trip to the dealership for programming. For the professional mechanic, this saves valuable bay time; for the DIYer, it makes the job straightforward and successful in your own garage.
From the Diagnostic Bay: The Ghost in the Machine
I remember a 1997 Pontiac Grand Prix with the 3.8L engine that came into my shop with a maddeningly intermittent no-start condition. The owner had replaced the battery, starter, and crank sensor, but the problem persisted. It would run fine for days, then refuse to start. After hooking up my scanner, I noticed that during the no-start events, I was losing all communication with the ECM. On these older GM platforms, a common failure point is the PCM’s internal circuitry breaking down when it gets hot. We swapped in a pre-programmed module, and the problem was solved for good. It’s a classic case where the central computer was the root cause of all the seemingly unrelated symptoms.
Common Signs of a Failing PCM
- ✔ Check Engine Light is on, especially with codes like P0601 (Internal Control Module Memory Check Sum Error) or other communication-related faults.
- ✔ Engine stalls for no reason, either while driving or at idle.
- ✔ The vehicle won’t start, but the battery and starter are good.
- ✔ Noticeably poor fuel mileage and engine performance.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass an emissions test.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the Module: On most of these 1997 GM models, the PCM is located inside the air filter housing for protection and cooling. You may need to remove the air intake ducting to access it.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be released. Once unplugged, unbolt the module from its mounting bracket.
- ✔ Install the New Module: Seat the new, pre-programmed module in the mounting bracket and secure it. Firmly reconnect the electrical harnesses, ensuring they click into place.
- ✔ Final Steps: Reassemble the air filter housing and any ducting you removed. Reconnect the negative battery terminal. The vehicle is now ready to start.
Verified Vehicle Compatibility
This module, part number 16218070 (also replaces 16217058), is a direct-fit replacement for the following 1997 models. We will use your VIN to ensure the programming is an exact match for your vehicle’s specific options.
- ✔ Achieva: 1997 (3.1L V6)
- ✔ Bonneville: 1997 (3.8L V6, w/o supercharger)
- ✔ Century: 1997 (3.1L V6)
- ✔ Cutlass: 1997 (Supreme models)
- ✔ Eighty Eight: 1997 (3.8L V6, w/o supercharger)
- ✔ Grand Am: 1997 (3.1L V6)
- ✔ Grand Prix: 1997 (3.1L V6 or 3.8L V6, w/o supercharger)
- ✔ LeSabre: 1997 (3.8L V6)
- ✔ Lumina Car: 1997 (3.1L V6)
- ✔ Monte Carlo: 1997 (3.1L V6)
- ✔ Regal: 1997 (3.8L V6, w/o supercharger)
- ✔ Silhouette: 1997 (3.4L V6)
- ✔ Skylark: 1997 (3.1L V6)
- ✔ Trans Sport: 1997 (3.4L V6)
- ✔ Venture: 1997 (3.4L V6)
What do I need to do after I purchase?
After you complete your purchase, please send us your vehicle’s 17-digit VIN. We cannot program and ship your module without it. We will handle all the programming before the part leaves our facility.
Is any additional programming required after installation?
No. This 1997 Achieva Powertrain Control Module arrives ready for installation. Because we program it with your VIN, it is a plug-and-play solution. You will not need to take it to a dealer or mechanic for further programming.
My original part number is 16217058. Will this fit?
Yes. This module, 16218070, is a fully compatible and interchangeable replacement for part number 16217058. It will function identically.
What if I need to perform a security relearn procedure?
On some GM vehicles of this era, a simple security relearn (often called a Passlock relearn) may be necessary. This procedure is easy to do, requires no special tools, and typically involves turning the key to the ‘On’ position for 10-15 minutes. We can provide instructions if needed.
Is this a new part?
This is a high-quality, tested original equipment (OE) part that has been verified to meet or exceed factory specifications. It is not a new-old-stock item, but a reliable, functional component ready for service.