Is Your 1997 Buick LeSabre Running Rough? The PCM Might Be the Culprit.
The Powertrain Control Module, or PCM, is the electronic brain of your 1997 Buick LeSabre. It manages everything from fuel injection and ignition timing to transmission shifting and emissions control. When this critical component begins to fail, it can cause a cascade of confusing and frustrating problems that can make your vehicle unreliable or even undrivable. If you’re dealing with a persistent Check Engine Light, poor performance, or intermittent stalling, getting your vehicle back on the road with a reliable 1997 LeSabre PCM is crucial.
From the Diagnostic Bay
I once had a 1997 Pontiac Grand Prix (which uses this same PCM) come into the shop. The owner had spent hundreds of dollars replacing the mass airflow sensor, crank position sensor, and even the fuel pump based on various codes and advice. The car would still stall randomly at red lights and had a terrible hesitation on acceleration. After verifying the sensors were good, we hooked up a scope to the injector drivers at the PCM. We found that the signal for injector #3 was dropping out intermittently. The problem wasn’t the parts he replaced; it was a failing driver inside the original module. A replacement, VIN-programmed PCM like this one solved all his issues in one go, saving him from further guesswork and expense.
Common Symptoms of a Failing GM PCM
- ✔ Check Engine Light: An illuminated or flashing Check Engine Light is one of the most common signs. Codes may point to multiple, unrelated sensors, indicating a processor issue.
- ✔ Engine Stalling or Misfiring: The engine may stall for no reason, either while driving or at idle. You might also experience rough idling or noticeable engine misfires.
- ✔ Poor Fuel Economy: If the PCM can’t properly regulate the air-fuel mixture, your gas mileage can drop significantly.
- ✔ Harsh or Failed Shifting: The PCM also controls the transmission. A faulty module can lead to delayed, hard, or erratic shifting between gears.
- ✔ No-Start Condition: In severe cases, a complete PCM failure can prevent the engine from starting at all, even if the battery and starter are working correctly.
- ✔ Failed Emissions Test: An inability to pass an emissions test is often directly linked to a malfunctioning powertrain control module.
Diagnosing and Replacing Your 1997 LeSabre PCM
This isn’t just a generic, off-the-shelf part. This is a direct-fit replacement powertrain control module for your vehicle, part number 16217058. The most critical part of the process is that we program, or ‘flash’, the module specifically for your car using the Vehicle Identification Number (VIN) you provide. This service ensures that the module has the latest GM software updates and is calibrated for your vehicle’s specific engine, transmission, and options. This eliminates the need for an expensive trip to the dealership for programming. You receive a component that is ready for installation, simplifying the repair process and getting you back behind the wheel faster.
Guaranteed Fitment
This module is a direct replacement for part numbers 16217058 and 16218070. It is compatible with a wide range of 1997 GM vehicles. Please verify your vehicle is on the list below:
- ACHIEVA 97: Electronic Control Module; 6-191 (3.1L)
- BONNEVILLE 97: Electronic Control Module; (6-231, 3.8L), w/o supercharged option
- CENTURY 97: Electronic Control Module; (6-191, 3.1L)
- CUTLASS 97: Electronic Control Module; Supreme
- EIGHTY EIGHT 97: Electronic Control Module; (6-231, 3.8L), w/o supercharged option
- GRAND AM 97: Electronic Control Module; 6-191 (3.1L)
- GRAND PRIX 97: Electronic Control Module; 6-191 (3.1L)
- GRAND PRIX 97: Electronic Control Module; 6-231 (3.8L), w/o supercharged option
- LESABRE 97: Electronic Control Module; (6-231, 3.8L)
- LUMINA CAR 97: Electronic Control Module; 6-191 (3.1L)
- MONTE CARLO 97: Electronic Control Module; 6-191 (3.1L)
- REGAL 97: Electronic Control Module; (6-231, 3.8L), w/o supercharged option
- SILHOUETTE 97: Electronic Control Module; (6-207, 3.4L)
- SKYLARK 97: Electronic Control Module; 6-191 (3.1L)
- TRANS SPORT 97: Electronic Control Module; (6-207, 3.4L)
- VENTURE 97: Electronic Control Module; (6-207, 3.4L)
By choosing this pre-programmed 1997 LeSabre PCM, you are opting for a reliable, straightforward solution that restores your vehicle’s original performance and functionality.
Frequently Asked Questions
Why do you need my vehicle’s VIN?
Your VIN (Vehicle Identification Number) is essential because it allows us to load the exact GM-specified software for your car’s engine, transmission, and factory options. This ensures perfect compatibility and performance, just like the original module.
Is this module difficult to install?
For most of the listed vehicles, the PCM is located in the engine bay and is accessible with basic hand tools. The process typically involves disconnecting the battery, unplugging the electrical connectors, and unbolting the module. Installation is the reverse of removal. Always disconnect the battery before starting work.
Will I need to do any additional programming after installation?
While the main engine and transmission programming is complete, some GM vehicles of this era may require a simple ‘Security Relearn’ or ‘CASE Relearn’ procedure after installation. These procedures can often be performed without special tools and instructions can be readily found online for your specific model.
What part numbers does this module replace?
This unit is a direct replacement for part numbers 16217058 and 16218070. If your original module has one of these numbers, this part will work for your vehicle provided it is on the fitment list.
What causes a PCM to fail?
PCM failure can occur due to a variety of factors, including age, heat cycles, vibrations, and electrical issues like shorts or voltage spikes. Internal electronic components can degrade over time, leading to the symptoms you’re experiencing.