Is Your 1997 Buick Regal Running Rough?
If you’re dealing with frustrating and unpredictable engine problems in your 1997 Buick Regal or another compatible GM vehicle, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, the PCM controls everything from fuel mixture and ignition timing to transmission shift points and emissions equipment. When it begins to fail, it can create a cascade of issues that are difficult to diagnose, leaving you with an unreliable vehicle and a persistent Check Engine Light.
From the Diagnostic Bay
I once had a 1997 Pontiac Grand Prix in the shop with a textbook case of what looked like a bad transmission. It was shifting harshly, sometimes getting stuck in gear, and the owner was convinced he needed a full transmission rebuild. We scanned the vehicle and found several transmission-related trouble codes. However, experience told us to look deeper. After checking the wiring and solenoids, we found they were all functioning correctly. The issue was the 1997 Regal PCM (the same unit used in the Grand Prix) which was sending erratic signals to the transmission. A new, properly programmed PCM solved all the shifting problems instantly, saving the customer thousands of dollars on an unnecessary transmission job. It’s a powerful reminder that the computer is the true heart of the modern vehicle’s operation.
Common Symptoms of a Failing PCM
A faulty engine computer can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indication that your PCM needs to be replaced:
- ✔ Check Engine Light: The light is on, and you may have codes related to sensors, emissions, or internal module failure (e.g., P0600-P0606).
- ✔ Engine Stalling or Misfiring: The engine may stall intermittently, misfire, or run rough for no apparent reason.
- ✔ Poor Fuel Economy: A sudden and unexplained drop in your vehicle’s MPG is a common sign the PCM isn’t managing the fuel system correctly.
- ✔ Harsh or Erratic Shifting: The transmission may shift hard, slip between gears, or fail to shift at the proper time.
- ✔ No-Start Condition: The engine cranks but refuses to start. This can happen if the PCM isn’t firing the fuel injectors or ignition coils.
- ✔ Failed Emissions Test: The vehicle may not pass an emissions inspection due to the PCM’s inability to properly manage the emissions control systems.
Why Choose Our Programmed 1997 Regal PCM?
This isn’t just a part in a box; it’s a complete solution designed to get your vehicle back to factory specifications. We eliminate the guesswork and the need for expensive dealership programming. When you order this 1997 Regal PCM, we flash it with the latest, most stable software updates directly from GM, using the unique Vehicle Identification Number (VIN) from your car. This ensures that the module is a perfect match for your vehicle’s specific engine, transmission, and options.
The result is a true plug-and-play component. Once installed, it will communicate seamlessly with all other modules in your vehicle, restoring lost power, improving drivability, and turning off that pesky check engine light. This unit is a direct replacement for part numbers 16218070 and 16217058.
Guaranteed Fitment for Your Vehicle
This Powertrain Control Module is guaranteed to fit the following 1997 GM models. Please verify your engine and options to ensure compatibility:
- Buick Century: 3.1L V6 (6-191)
- Buick LeSabre: 3.8L V6 (6-231)
- Buick Regal: 3.8L V6 (6-231), without supercharged option
- Buick Skylark: 3.1L V6 (6-191)
- Chevrolet Lumina Car: 3.1L V6 (6-191)
- Chevrolet Monte Carlo: 3.1L V6 (6-191)
- Chevrolet Venture: 3.4L V6 (6-207)
- Oldsmobile Achieva: 3.1L V6 (6-191)
- Oldsmobile Cutlass: Supreme models
- Oldsmobile Eighty Eight: 3.8L V6 (6-231), without supercharged option
- Oldsmobile Silhouette: 3.4L V6 (6-207)
- Pontiac Bonneville: 3.8L V6 (6-231), without supercharged option
- Pontiac Grand Am: 3.1L V6 (6-191)
- Pontiac Grand Prix: 3.1L V6 (6-191) or 3.8L V6 (6-231) without supercharged option
- Pontiac Trans Sport: 3.4L V6 (6-207)
Frequently Asked Questions
What exactly does the Powertrain Control Module (PCM) do?
The PCM is your vehicle’s main computer. It controls the critical functions of the engine and transmission, including fuel injection, spark timing, variable valve timing, transmission shifting, and emissions systems, to ensure optimal performance, fuel efficiency, and low emissions.
Do I need to take this part to a dealer for programming?
No. We handle all the programming for you before we ship the part. Simply provide us with your vehicle’s VIN during or after checkout, and we will flash the module with the correct GM software for your specific car. It will arrive ready to install.
Is this a difficult part to install?
For most DIY mechanics, the installation is straightforward. It typically involves disconnecting the battery, unplugging the electrical connectors from the old PCM, unbolting it, and then installing the new one in reverse order. In some cases, a simple security relearn procedure (like the 30-minute VATS/Passlock relearn) may be required, which involves cycling the key and does not require special tools.
Where can I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on a metal plate on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this module fix my specific problem?
This module will correct issues that are directly caused by a faulty PCM. While the symptoms listed above are common indicators of PCM failure, it is always recommended to have a proper diagnosis performed to rule out other potential causes like faulty sensors or wiring issues.