Restore Your Vehicle’s Performance and Reliability
Is your 1998 Buick LeSabre, Grand Prix, or another compatible GM vehicle suffering from erratic behavior? A failing Powertrain Control Module (PCM) is often the culprit behind a host of frustrating issues, from poor fuel economy and rough shifting to a persistent check engine light that won’t go away. The PCM is the central computer of your vehicle, responsible for managing critical engine and transmission functions. When it fails, the entire system’s performance is compromised. This replacement PCM, part number 09356741, is the definitive solution to restore your vehicle’s original drivability and efficiency.
We take the guesswork out of the repair process. Unlike a generic module from a salvage yard, this unit is professionally programmed specifically for your vehicle. After your purchase, simply provide us with your Vehicle Identification Number (VIN), and we will flash the module with the latest, most stable software updates directly from GM. This ensures perfect compatibility and optimal performance right out of the box, addressing any factory bugs that may have existed in the original programming. This critical programming step ensures that the fuel delivery, spark timing, transmission shift points, and emissions controls all operate precisely as the manufacturer intended for your specific car.
Diagnosing a Faulty 1998 LeSabre PCM
A failing PCM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, a faulty computer could be the root cause. This module is the correct solution for these common problems.
- ✔ Check Engine Light is on with various trouble codes (DTCs) stored, especially those related to internal module failure, sensor circuits, or communication errors.
- ✔ Harsh or erratic automatic transmission shifting, or getting stuck in one gear (limp mode).
- ✔ Unexplained drops in fuel economy.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Difficulty starting the engine, or a no-start condition where the engine cranks but won’t fire.
- ✔ Failure to pass an emissions inspection due to readiness monitor issues.
- ✔ Intermittent loss of power or hesitation during acceleration.
Simple Installation and Wide Compatibility
This Powertrain Control Module is a direct-fit replacement, designed to match the original factory unit’s form and function. Installation is straightforward for any experienced DIYer or professional technician. Once installed, you may need to perform a simple security relearn procedure (often called a Passlock or Passkey relearn) to sync the new module with your vehicle’s anti-theft system. This procedure typically involves a sequence of key turns and can be done without special tools. This single part, 09356741, is also a direct replacement for several other service numbers, including 16236757, 9357034, 9357440, and 9366314, making it a versatile solution for a wide range of GM cars from that era, including the Pontiac Grand Am, Oldsmobile Alero, Chevrolet Malibu, and many more.
Frequently Asked Questions
Do I need to program this PCM?
No, we handle the programming for you! Simply provide your vehicle’s VIN during or after checkout, and we will flash the module with the correct GM software before shipping. It will arrive ready for installation.
What is a security relearn procedure?
Many GM vehicles of this era have an anti-theft system that is linked to the PCM. After installing the new module, you may need to perform a ‘relearn’ procedure so the vehicle recognizes the new computer and allows the engine to start. This is a simple process that usually takes 10-30 minutes and involves turning the key in the ignition in a specific sequence. Instructions are widely available online for your specific model.
Where is the PCM located on my 1998 Buick LeSabre?
On most compatible models, including the 1998 LeSabre, the PCM is located inside the vehicle’s air filter box in the engine compartment. This placement protects it from the elements but keeps it accessible for service. Always disconnect the battery before attempting to remove or install the module.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls the electronic solenoids inside the transmission that manage shifting. If the PCM is sending faulty signals, it can cause harsh shifting, delayed engagement, or failure to shift. If your vehicle’s issues are caused by a faulty module, this part is the correct fix.
How do I provide my VIN?
You can add your 17-digit VIN in the notes section at checkout or reply to your order confirmation email with the information. We cannot ship your part until we receive the VIN, as the programming is essential for it to function in your car.