Is Your 1998 LeSabre Running Rough? It Could Be The PCM.
As a technician with over two decades of experience under the hood, I’ve seen countless GM vehicles from the late 90s, especially those with the rock-solid 3.8L V6, come into the shop with baffling issues. The owner complains of a car that won’t start when it’s hot, transmission shifts that are harsh and unpredictable, a check engine light that no amount of part-swapping will turn off, or just terrible fuel mileage. These are the classic, tell-tale signs of a failing Powertrain Control Module (PCM).
A Real-World Diagnostic Story
A customer’s 1998 LeSabre came in last week with these exact symptoms. It had a random no-start condition and would occasionally stall at stoplights. He had already replaced the battery, alternator, and fuel filter, but the problem persisted. My first step was to connect a professional scan tool. It revealed multiple communication error codes and erratic data from the crank and cam sensors, even though the sensors themselves tested fine. This immediately pointed me to the PCM. The internal processors and capacitors on these modules can degrade over time from heat and vibration, causing precisely this kind of ghost-in-the-machine behavior. After confirming power and ground to the module were solid, the diagnosis was clear: the PCM was failing internally.
The Direct-Fit, Programmed Solution
This isn’t just a replacement part; it’s a complete, ready-to-install solution for your vehicle. We are offering a replacement Powertrain Control Module, part number 9366314, that is the correct fix for these issues. The most critical service we provide is programming the module specifically to your car’s Vehicle Identification Number (VIN) before it ships. This is a step that many sellers skip, leaving you with a part that won’t work and requires an expensive trip to a dealership.
By programming it here, we ensure:
- ✔ The module has the latest GM software updates, which often correct factory drivability issues.
- ✔ It communicates perfectly with your car’s anti-theft system (Pass-Key/VATS), allowing the engine to start.
- ✔ It has the correct calibration for your specific engine (3.8L V6) and transmission, restoring smooth shifting and proper performance.
- ✔ You can install it yourself without needing specialized programming tools.
Confirming Your Part Number
Matching the part number is essential for electronic components. This module is a direct replacement for several service numbers. Check the sticker on your current PCM for one of the following numbers to guarantee compatibility:
- ✔ 09356741
- ✔ 16236757
- ✔ 9357034
- ✔ 9357440
- ✔ 9366314
Guaranteed Fitment for Your GM Vehicle
While this listing is focused on the 1998 Buick LeSabre, this versatile PCM was used across a wide range of GM cars from 1998 and 1999. Please verify your specific model and engine below. If you see your vehicle, this is the correct part for you.
Compatible Models Include:
- ✔ Buick: Century (98), LeSabre (98), Park Avenue (98), Regal (98), Riviera (98), Skylark (98)
- ✔ Chevrolet: Camaro (98), Lumina (98), Malibu (98), Monte Carlo (98)
- ✔ Oldsmobile: Achieva (98), Alero (99), Cutlass (98-99), Eighty Eight (98), Intrigue (98), Silhouette (98)
- ✔ Pontiac: Bonneville (98), Firebird (98), Grand Am (98-99), Grand Prix (98), Trans Sport (98)
- ✔ GMC: Venture (98)
IMPORTANT: After your purchase, you must provide us with your 17-digit VIN. We cannot ship your order until we have this information to program the module correctly.