Restore Peak Performance to Your GM Vehicle
Is your 1998 Buick Riviera or another GM vehicle from that era running rough, shifting erratically, or refusing to start? Before you start throwing expensive parts at the problem, consider the brain of the operation: the Powertrain Control Module (PCM). As a technician with over two decades of experience, I’ve seen countless cases where a failing PCM was the root cause of mysterious and frustrating engine issues. This isn’t just a replacement part; it’s a direct solution, pre-programmed with the latest GM software specifically for your vehicle’s VIN. This eliminates the need for a costly trip to the dealership for programming.
Case Study: A Tricky Diagnosis
I remember a 1998 Pontiac Bonneville with the 3.8L V6 that came into my bay with a complaint of intermittent stalling at stoplights. The owner had already replaced the plugs, wires, and even the fuel pump. No codes were stored, making it a real head-scratcher. After hooking up my scan tool and monitoring live data, I noticed the injector pulse width would drop out randomly for a split second right before it stalled. This pointed away from a mechanical issue and straight toward the driver—the PCM. After installing a VIN-programmed module like this one, the car ran perfectly. The internal circuitry of the old PCM was failing under heat soak, a common issue in these units after 20+ years of service. This is why a quality, correctly programmed 1998 Riviera Powertrain Control Module is often the definitive fix.
Common Signs of a Failing PCM
- ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or other communication faults.
- ✔ The engine cranks but refuses to start.
- ✔ Poor or erratic automatic transmission shifting.
- ✔ A noticeable drop in fuel economy.
- ✔ Intermittent stalling, stumbling, or hesitation while driving.
- ✔ Failure to pass an emissions inspection.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- ✔ Locate the PCM: On most of these GM vehicles, the PCM is located in the engine compartment, often inside the air filter box housing for protection. Consult a repair manual for your specific model if you’re unsure.
- ✔ Disconnect Connectors: Carefully unclip the wiring harness connectors from the old PCM. These connectors have locking tabs that need to be released. Avoid pulling on the wires themselves.
- ✔ Remove the Old Module: Unbolt the PCM from its mounting bracket. It’s typically held in place by a few small bolts or screws.
- ✔ Install the New Module: Seat your new, pre-programmed 1998 Riviera Powertrain Control Module into the mounting bracket and secure it.
- ✔ Reconnect and Secure: Firmly plug the wiring harnesses into the new module until they click into place. Reconnect the negative battery terminal.
- ✔ Final Step: Your vehicle may require a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. This allows the new PCM to synchronize with your vehicle’s anti-theft system.
Verified Vehicle Compatibility
This module, corresponding to service number 9357440 and others, is a direct-fit replacement for a wide range of GM vehicles. Please verify your part number or contact us with your VIN. This part is confirmed to fit the following models:
- 1998-1999 Oldsmobile Cutlass
- 1998-1999 Pontiac Grand Am (3.1L, 3.4L)
- 1998 Buick LeSabre (3.8L)
- 1998 Buick Park Avenue (3.8L)
- 1998 Chevrolet Venture (3.4L)
- 1999 Oldsmobile Alero (3.4L)
- 1998 Buick Riviera (3.8L)
- 1998 Buick Century (3.1L)
- 1998 Buick Skylark (3.1L)
- 1998 Pontiac Grand Prix
- 1998 Oldsmobile Achieva (3.1L)
- 1998 Oldsmobile Eighty Eight
- 1998 Oldsmobile Silhouette
- 1998 Pontiac Firebird (3.8L)
- 1998 Chevrolet Malibu (3.1L)
- 1998 Oldsmobile Intrigue
- 1998 Chevrolet Lumina Car
- 1998 Pontiac Bonneville
- 1998 Chevrolet Camaro (3.8L)
- 1998 Chevrolet Monte Carlo
- 1998 Buick Regal
- 1998 Pontiac Trans Sport
Do I need to do any programming myself?
Do I need to do any programming myself?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s 17-digit VIN during checkout, and the module will arrive loaded with the latest GM software and ready for installation.
Is this a simple plug-and-play installation?
Yes, for most vehicles it is. Once programmed to your VIN, it directly replaces the old unit. Some vehicles may require a simple security relearn procedure, which does not require special tools and can be done in your driveway.
Where is the VIN located on my vehicle?
You can typically find your 17-digit Vehicle Identification Number (VIN) on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix my car’s specific problem?
This 1998 Riviera Powertrain Control Module is the correct solution for issues caused by a faulty PCM, such as no-start conditions, erratic shifting, and certain check engine light codes. While it resolves many common problems, we always recommend proper diagnostics to confirm the PCM is the point of failure.
What if I order the wrong part?
Providing your VIN is the best way to guarantee compatibility. By programming the module to your specific vehicle, we ensure it’s the correct part for the job, eliminating guesswork and preventing compatibility issues.