Is Your 1998 Buick Century Running Rough?
If your Buick Century, or another compatible GM vehicle, is experiencing frustrating issues like stalling, erratic shifting, poor fuel economy, or a persistent Check Engine Light, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, the PCM’s health is critical for your vehicle’s performance and reliability. When it starts to fail, it can cause a cascade of problems that are difficult to diagnose. Don’t let a faulty computer keep you off the road. This is your direct, reliable solution.
We once had a 1998 Grand Prix in the shop with a classic intermittent stalling issue. The owner had already replaced the crank sensor, cam sensor, and even the fuel pump based on various forum suggestions. The car would run fine for days, then die at a stoplight without warning. After hooking up our scanner and monitoring live data, we noticed the PCM was intermittently losing communication just before the stall. A new, properly programmed PCM solved the problem instantly. It’s a reminder that chasing sensors can be a costly dead end when the core issue lies with the vehicle’s brain.
Symptoms of a Failing Powertrain Control Module
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to start or intermittent no-start conditions.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
The Simple, Pre-Programmed Solution for Your Vehicle
Forget expensive dealership visits and the hassle of finding a shop to program a new module. We take the guesswork out of the repair. This replacement 1998 Buick Century PCM arrives at your door completely programmed for your specific vehicle. All we need is your Vehicle Identification Number (VIN) during checkout. Our technicians will flash the module with the latest, most stable software updates from General Motors, ensuring optimal performance and compatibility. This is a true plug-and-play solution designed to get your car running smoothly again.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for units with the following service numbers: 09356741, 16236757, 9357034, 9357440, and 9366314. It is engineered to work seamlessly with a wide range of 1998 and 1999 GM vehicles. Please verify your model and engine options below:
- ACHIEVA 98 Electronic Control Module; 6-191 (3.1L)
- ALERO 99 Electronic Control Module; (LH center dash), 3.4L, with matching ID
- BONNEVILLE 98 Electronic Control Module
- CAMARO 98 Electronic Control Module; 6-231 (3.8L)
- CENTURY 98 Electronic Control Module; (6-191, 3.1L)
- CUTLASS 98-99 Electronic Control Module
- EIGHTY EIGHT 98 Electronic Control Module
- FIREBIRD 98 Electronic Control Module; 6-231 (3.8L)
- GRAND AM 98-99 Electronic Control Module; with matching engine/ID
- GRAND PRIX 98 Electronic Control Module
- INTRIGUE 98 Electronic Control Module
- LESABRE 98 Electronic Control Module; (6-231, 3.8L)
- LUMINA CAR 98 Electronic Control Module; (LH engine compartment)
- MALIBU 98 Electronic Control Module; 6-191 (3.1L)
- MONTE CARLO 98 Electronic Control Module
- PARK AVENUE 98 Electronic Control Module; (6-231, 3.8L)
- REGAL 98 Electronic Control Module
- RIVIERA 98 Electronic Control Module; (6-231, 3.8L)
- SILHOUETTE 98 Electronic Control Module; (LH engine compartment)
- SKYLARK 98 Electronic Control Module; 6-191 (3.1L)
- TRANS SPORT 98 Electronic Control Module; (LH engine compartment)
- VENTURE 98 Electronic Control Module; (6-207, 3.4L)
Frequently Asked Questions
Do I need to get this module programmed?
No. This module comes fully programmed to your vehicle’s VIN. Simply provide your VIN at checkout, and we handle all the programming before shipping. It will be ready for installation right out of the box.
Where is the PCM located on my 1998 Buick Century?
On most compatible models like the 1998 Buick Century, the PCM is located inside the vehicle’s air filter box in the engine compartment. This protects it from the elements while allowing for easy access. Always disconnect the battery before attempting removal.
Will I need to perform any additional procedures after installation?
In many cases, the vehicle will start and run perfectly after installation. However, some GM vehicles of this era may require a security relearn procedure or a Crankshaft Variation (CASE) relearn. These procedures can often be performed without special tools and instructions are widely available online.
What happens if I don’t provide my VIN?
Providing your VIN is essential for us to program the module correctly. We cannot ship the part without a VIN because an unprogrammed module will not function in your vehicle. Please have your VIN ready when you place your order to avoid delays.
Is this part a direct replacement for my original?
Yes, this is a direct-fit replacement part, provided your vehicle is on the compatibility list and your original module carries one of the listed service numbers. It uses the same mounting points and electrical connectors as the factory unit.