Restore Peak Performance to Your GM Vehicle
Are you dealing with frustrating, intermittent issues in your 1997 Grand Prix or other GM vehicle? A failing Powertrain Control Module (PCM), often called the engine computer, is one of the most common culprits I see for problems that seem to appear out of nowhere. Symptoms like a persistent Check Engine Light, sudden stalling, rough idling, or a complete no-start condition can often be traced back to a faulty PCM. This isn’t just an inconvenience; it affects your vehicle’s reliability, fuel economy, and overall safety. Don’t let a bad computer keep your car off the road.
This replacement PCM, part number 16217058, is the definitive solution. We take the guesswork and hassle out of the repair by pre-programming the module specifically for your vehicle using your VIN. This ensures it arrives with the latest GM software updates, ready for a straightforward installation. You get a reliable part that restores the precise engine and transmission management your car had when it left the factory.
Real-World Repair Story
Real-World Repair Story
I remember a 1997 Buick Regal with the 3.8L V6 that came into my shop. The owner was at his wit’s end. He’d replaced the crank sensor, the MAF sensor, and even the fuel pump, but the car would still stall randomly at red lights. No consistent codes, just pure frustration. After hooking up my scan tool and watching the live data, I saw the fuel trim values and ignition timing signals drop out for a split second right before it would die. This pointed directly to the processor inside the PCM. We installed a VIN-programmed module just like this one, performed the security relearn, and the car ran perfectly. It’s a classic failure on these models, and this part is the direct fix.
Is Your GM Vehicle Showing These Telltale Signs?
A failing PCM can manifest in many ways. If you’re experiencing any of the following, it’s a strong indicator that your engine computer needs attention:
- ✔ Unexplained Check Engine Light, especially with internal module codes like P0601-P0606.
- ✔ Engine stalling or shutting off while driving.
- ✔ Rough or erratic idling.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Poor fuel mileage and decreased engine performance.
- ✔ Harsh or incorrect shifting from the automatic transmission.
- ✔ Communication errors with scan tools (U-codes).
The Right Fix for Your 1997 Grand Prix PCM
Choosing a pre-programmed module is the smartest way to complete this repair. It eliminates the need for expensive dealership programming or specialized tools. We handle the complex part, so you can focus on the simple installation. By providing your VIN at checkout, you ensure that this 1997 Grand Prix PCM arrives as a true plug-and-play solution, restoring your vehicle’s core functions and getting you back on the road with confidence.
Your Straightforward Installation Guide
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- ✔ Locate the PCM: On most of these GM models, the PCM is located inside the air filter box assembly. You may need to remove the air filter and housing to access it.
- ✔ Disconnect Connectors: Carefully unclip the wiring harness connectors from the old PCM. There are typically multiple color-coded connectors. Take your time to avoid damaging the locking tabs.
- ✔ Remove the Old Module: Unbolt the PCM from its mounting bracket and remove it from the vehicle.
- ✔ Install the New Module: Seat your new, pre-programmed PCM into the mounting bracket and secure it. Reconnect the wiring harnesses, ensuring each one clicks firmly into place.
- ✔ Reconnect Battery: Re-attach the negative battery terminal.
- ✔ Perform Security Relearn: You will need to perform the GM Passlock/VATS security relearn procedure. This typically involves turning the key to ‘ON’ for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. Your vehicle will not start until this is completed.
Verified Fitment for Your 1997 GM Vehicle
This module is a direct replacement for part numbers 16217058 and 16218070. It is guaranteed to fit the following 1997 models with the specified engines:
- ✔ Achieva: 3.1L V6
- ✔ Bonneville: 3.8L V6 (non-supercharged)
- ✔ Century: 3.1L V6
- ✔ Cutlass: Supreme Models
- ✔ Eighty Eight: 3.8L V6 (non-supercharged)
- ✔ Grand Am: 3.1L V6
- ✔ Grand Prix: 3.1L V6 & 3.8L V6 (non-supercharged)
- ✔ LeSabre: 3.8L V6
- ✔ Lumina Car: 3.1L V6
- ✔ Monte Carlo: 3.1L V6
- ✔ Regal: 3.8L V6 (non-supercharged)
- ✔ Silhouette: 3.4L V6
- ✔ Skylark: 3.1L V6
- ✔ Trans Sport: 3.4L V6
- ✔ Venture: 3.4L V6
Frequently Asked Questions
Real-World Repair Story
I remember a 1997 Buick Regal with the 3.8L V6 that came into my shop. The owner was at his wit’s end. He’d replaced the crank sensor, the MAF sensor, and even the fuel pump, but the car would still stall randomly at red lights. No consistent codes, just pure frustration. After hooking up my scan tool and watching the live data, I saw the fuel trim values and ignition timing signals drop out for a split second right before it would die. This pointed directly to the processor inside the PCM. We installed a VIN-programmed module just like this one, performed the security relearn, and the car ran perfectly. It’s a classic failure on these models, and this part is the direct fix.