Restore Peak Performance to Your GM Vehicle
If you’re wrestling with a frustrating check engine light, poor fuel economy, erratic shifting, or a no-start condition in your 1998 Buick Riviera or other compatible GM model, a failing Powertrain Control Module (PCM) is often the culprit. As a technician with over two decades of experience, I’ve seen firsthand how a faulty PCM can create a cascade of confusing symptoms. This isn’t just a replacement part; it’s a direct solution to restore your vehicle’s reliability and drivability.
This module, part number 9366314, is the central computer for your engine and transmission. We take the guesswork and hassle out of the repair by programming it specifically for your vehicle using your VIN. This ensures it has the latest GM software updates, allowing all components to communicate correctly, just as the factory intended. You get a component that is ready for installation right out of the box, saving you a costly trip to the dealership for programming.
A Technician’s Notebook
I remember a 1998 Grand Prix that came into my shop with what the owner was sure was a failing transmission. It was shifting hard and unpredictably. We checked the fluid, scanned for transmission-specific codes, and everything seemed fine. On a hunch, we monitored the data stream from the PCM and saw erratic signals being sent to the shift solenoids. The PCM itself was failing, not the transmission. We installed a VIN-programmed module just like this one, and the car shifted like new. This saved the customer over a thousand dollars on an unnecessary transmission rebuild.
Is Your Vehicle Showing These Symptoms?
A failing PCM can manifest in many ways. Here are some of the most common signs that it’s time for a replacement:
- âś” Persistent Check Engine Light (CEL)
- âś” Stored diagnostic trouble codes (DTCs) such as P0601, P0602, or P0606
- âś” Rough or unstable idle
- âś” Decreased fuel efficiency
- âś” Engine stalling or misfiring
- âś” Harsh or delayed transmission shifting
- âś” Failure to pass an emissions test
- âś” Intermittent or complete no-start condition
A Straightforward Guide to Installation
Replacing the 1998 Riviera PCM is a job most DIY enthusiasts can handle with basic tools. Following these steps will ensure a smooth installation process:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the PCM: On most of these GM models, the PCM is located in the engine bay, often inside the air filter box housing for protection. Consult a repair manual for your specific vehicle if you’re unsure.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old module. They have locking tabs that may need to be gently pried up. Avoid pulling on the wires themselves.
- Swap the Modules: Unbolt the old PCM and remove it. Place the new, pre-programmed module in the same position and secure it with the original hardware.
- Reconnect Everything: Firmly plug the wiring harness connectors into the new PCM until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: Some GM vehicles require a security relearn procedure to allow the car to start. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows the new PCM to sync with your vehicle’s anti-theft system.
Verified Vehicle Compatibility
This module is a direct fit for a wide range of GM vehicles. Please verify your model and engine options below. This part is a direct replacement for service numbers 09356741, 16236757, 9357034, 9357440, and 9366314.
LESABRE 98 (3.8L)
PARK AVENUE 98 (3.8L)
RIVIERA 98 (3.8L)
CENTURY 98 (3.1L)
SKYLARK 98 (3.1L)
REGAL 98
Chevrolet:
CAMARO 98 (3.8L)
LUMINA CAR 98
MALIBU 98 (3.1L)
MONTE CARLO 98
VENTURE 98 (3.4L)
Oldsmobile:
ACHIEVA 98 (3.1L)
ALERO 99 (3.4L, ID 16236757, 9356741, 9357034, 9357440, 9366314)
CUTLASS 98
CUTLASS 99 (ID 16236757)
EIGHTY EIGHT 98
INTRIGUE 98
SILHOUETTE 98
Pontiac:
BONNEVILLE 98
FIREBIRD 98 (3.8L)
GRAND AM 98 (3.1L)
GRAND AM 99 (3.4L, ID 16236757, 9347440, 9356741, 9357034, 9366314)
GRAND PRIX 98
TRANS SPORT 98