Is Your GM Vehicle Running Rough? Get a Reliable Solution.
If you’re dealing with a persistent check engine light, erratic transmission shifting, poor fuel mileage, or even a no-start condition on your 1998 Buick Riviera or other compatible GM model, a failing Powertrain Control Module (PCM) is a very likely culprit. Over my 20+ years in the shop, I’ve seen hundreds of these late-90s GM vehicles, and the PCM is often the root cause of these frustrating electronic gremlins. It’s the brain of your engine and transmission, and when it fails, it can cause a cascade of problems that are difficult to diagnose.
This isn’t just another part. This is a direct-fit replacement PCM, service number 09356741, that we program specifically to your vehicle’s VIN before it leaves our facility. This critical step ensures all factory settings and the latest GM software updates are loaded, making the installation process straightforward and eliminating the need for an expensive trip to the dealership for programming.
Common Symptoms of a Failing 1998 Riviera Powertrain Control Module
A faulty PCM can manifest in many ways. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Unexplained Check Engine Light (CEL) illumination
- ✔ Harsh or delayed transmission shifting
- ✔ A noticeable drop in fuel economy
- ✔ Engine stalling, stumbling, or misfiring
- ✔ The vehicle cranks but will not start
- ✔ Communication errors with diagnostic scan tools
Expert Pro Tip from a 20-Year Veteran Technician
Before you condemn your old PCM, take a moment to inspect the electrical connectors. On these 25+ year-old vehicles, corrosion on the connector pins is extremely common. Unplug the harnesses from the module and look for any green or white crusty buildup. A quick spray with an electronics-safe contact cleaner and a gentle scrub with a small brush can sometimes resolve communication issues that mimic a complete PCM failure. It’s a five-minute check that could save you a lot of time and confirm your diagnosis.
Plug-and-Play Installation: No Dealer Visit Required
We make this repair as simple as possible. Because we handle the programming, you can typically install this module at home with basic hand tools. Just follow these general steps:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most of these models, the PCM is found either in the engine bay (often inside the air filter box assembly) or under the passenger-side dashboard.
- Disconnect and Remove: Carefully unplug the electrical harness connectors. They have locking tabs that need to be released. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed PCM into place. Securely reconnect the electrical harnesses, making sure they click and lock into position.
- Final Step: Reconnect the negative battery terminal. The vehicle may need to go through a brief idle relearn procedure, which usually involves starting it and letting it idle for a few minutes.
Guaranteed Compatibility
This module is a direct replacement for several service numbers, ensuring a perfect match for your vehicle. It is compatible with the following part numbers:
09356741, 16236757, 9357034, 9357440, 9366314
Vehicle Fitment List:
This Powertrain Control Module fits a wide range of General Motors vehicles. Please verify your model and options below:
- ACHIEVA 98 (6-191, 3.1L)
- ALERO 99 (LH center dash), 3.4L, ID 16236757, 9356741, 9357034, 9357440, or 9366314
- BONNEVILLE 98
- CAMARO 98 (6-231, 3.8L)
- CENTURY 98 (6-191, 3.1L)
- CUTLASS 98 (Electronic Control Module)
- CUTLASS 99 (LH center dash), ID 16236757
- EIGHTY EIGHT 98
- FIREBIRD 98 (6-231, 3.8L)
- GRAND AM 98 (6-191, 3.1L)
- GRAND AM 99 (LH center dash), 3.4L, ID 16236757, 9356741, 9357034, 9347440, 9366314
- GRAND PRIX 98
- INTRIGUE 98
- LESABRE 98 (6-231, 3.8L)
- LUMINA CAR 98 (LH engine compartment)
- MALIBU 98 (6-191, 3.1L)
- MONTE CARLO 98
- PARK AVENUE 98 (6-231, 3.8L)
- REGAL 98
- RIVIERA 98 (6-231, 3.8L)
- SILHOUETTE 98 (LH engine compartment)
- SKYLARK 98 (6-191, 3.1L)
- TRANS SPORT 98 (LH engine compartment)
- VENTURE 98 (6-207, 3.4L)
IMPORTANT: After your purchase, please provide us with your VIN. We cannot ship your part until we have programmed it. This ensures you receive a fully functional, vehicle-specific module ready for installation.