Is your 1997 Chevrolet Monte Carlo or other GM vehicle experiencing frustrating issues like stalling, erratic shifting, a persistent Check Engine Light, or a complete no-start condition? The Powertrain Control Module (PCM), the electronic brain of your vehicle, is often the root cause. This replacement PCM, part number 16217058, is the reliable, straightforward solution to restore your car’s performance and get you back on the road with confidence.
What sets our service apart is the critical programming step we handle for you. Before we ship your module, we will flash it with the latest GM software updates, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). This means you receive a part that is truly plug-and-play, eliminating the need for expensive dealership programming or specialized scan tools. This is the definitive fix for a wide range of drivability problems plaguing these otherwise dependable GM cars.
A Technician’s Notebook
I remember a 1997 Pontiac Grand Prix with the 3.8L V6 that came into the shop on a tow truck. The owner said it would run fine for a week, then suddenly die at a stoplight and refuse to restart for hours. There were no consistent trouble codes, just a history of random communication errors. After checking all the usual suspects—fuel pressure, crank sensor, ignition module—we focused on the PCM. On these older GM platforms, heat cycles and age can cause microscopic cracks in the PCM’s internal solder joints, leading to the exact kind of intermittent failure the owner described. We installed a VIN-programmed PCM like this one, and the car ran flawlessly. It’s a classic failure I’ve seen dozens of times, and a quality replacement module is the only correct fix.
Is Your GM Showing These Telltale Signs?
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement. This is especially true if you see internal module error codes.
- ✔ Check Engine Light is illuminated, often with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0605 (Internal Control Module Read Only Memory (ROM) Error).
- ✔ The engine cranks but will not start.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Unexplained drops in fuel economy.
- ✔ Intermittent stalling or stumbling while driving.
- ✔ Failure to communicate with a diagnostic scan tool.
- ✔ Failed emissions testing due to monitor readiness issues.
A Straightforward Guide to Installation
Replacing the PCM on these vehicles is a job most DIYers can handle in their own driveway. Follow these general steps for a successful installation.
- Safety First: Always 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 of these models, the PCM is located inside the air filter housing. You will need to remove the air filter cover and filter to access it.
- Disconnect the Harnesses: Carefully unclip and remove the electrical wiring harnesses connected to the old module. There are typically two or three large connectors with locking levers or tabs.
- Remove the Old Module: Unbolt or unclip the old PCM from its mounting bracket within the airbox.
- Install the New Module: Seat your new, pre-programmed PCM into the mounting bracket and securely reconnect the wiring harnesses. You should hear a click as they lock into place.
- Reassemble & Reconnect: Reinstall the air filter and cover. Reconnect the negative battery terminal.
- Security Relearn (If Necessary): In some cases, you may need to perform a simple security relearn procedure. This usually involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. This allows the new PCM to sync with your vehicle’s anti-theft system.
Verified Compatibility for Your GM Vehicle
This module is a direct replacement for part numbers 16217058 and 16218070. Please verify your part number and confirm your vehicle is on this list to ensure proper fitment:
- ✔ 1997 Achieva: with 3.1L (6-191) Engine
- ✔ 1997 Bonneville: with 3.8L (6-231) Engine (w/o supercharged option)
- ✔ 1997 Century: with 3.1L (6-191) Engine
- ✔ 1997 Cutlass: Supreme models
- ✔ 1997 Eighty Eight: with 3.8L (6-231) Engine (w/o supercharged option)
- ✔ 1997 Grand Am: with 3.1L (6-191) Engine
- ✔ 1997 Grand Prix: with 3.1L (6-191) or 3.8L (6-231) Engine (w/o supercharged option)
- ✔ 1997 LeSabre: with 3.8L (6-231) Engine
- ✔ 1997 Lumina Car: with 3.1L (6-191) Engine
- ✔ 1997 Monte Carlo: with 3.1L (6-191) Engine
- ✔ 1997 Regal: with 3.8L (6-231) Engine (w/o supercharged option)
- ✔ 1997 Silhouette: with 3.4L (6-207) Engine
- ✔ 1997 Skylark: with 3.1L (6-191) Engine
- ✔ 1997 Trans Sport: with 3.4L (6-207) Engine
- ✔ 1997 Venture: with 3.4L (6-207) Engine
Frequently Asked Questions
Frequently Asked Questions
What is VIN programming and why is it important?
VIN programming is the process of loading your vehicle’s specific software and settings onto the PCM. This includes information about your engine, transmission, and factory options. Without it, the vehicle will not run correctly, if at all. We do this for you so the part is ready to install out of the box.
How do I provide my VIN number?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot program or ship the module without it.
Is this a difficult part to install myself?
For most individuals with basic hand tools, this is a very manageable job. The PCM is typically easy to access inside the air filter box. Our installation guide above provides the general steps.
Will this fix my car’s hard shifting problem?
The PCM directly controls transmission shift points and line pressure. If the module is faulty, it is a very common cause of shifting issues. Replacing a bad PCM with this pre-programmed unit is a primary solution for such problems.
What if my original part number is 16218070?
This module is a fully compatible replacement for both 16217058 and 16218070. As long as your vehicle is on the fitment list, this part will work correctly.