Restore Peak Performance to Your 1998 Grand Prix
Is your 1998 Pontiac Grand Prix suffering from erratic behavior, a persistent check engine light, or a no-start condition? The Powertrain Control Module (PCM), often called the vehicle’s brain, is the central command unit for your engine and transmission. When it fails, it can cause a cascade of frustrating and difficult-to-diagnose issues. This direct-fit replacement PCM, service number 9357034, is the definitive solution to restore your vehicle’s reliability, fuel efficiency, and smooth operation.
Diagnosing Your 1998 Grand Prix Powertrain Control Module
A failing PCM can mimic many other component failures, leading to costly and time-consuming misdiagnoses. If you’ve replaced sensors and other parts without success, it’s time to consider the control unit itself. The PCM manages critical functions like fuel injection, ignition timing, transmission shifting, and emissions control. A fault within its complex circuits can manifest in numerous ways. This module is the correct, reliable fix for a confirmed PCM failure, getting your car back on the road with confidence.
From the Diagnostic Bay
We had a 1998 Buick LeSabre with the 3.8L V6 (a common platform with the Grand Prix) come into the shop with a complaint of intermittent stalling and harsh shifting. The owner had already replaced the MAF sensor and the throttle position sensor based on some generic trouble codes. The problem persisted. After hooking up our professional scan tool and monitoring live data, we noticed the PCM was intermittently dropping communication and sending erratic signals to the transmission solenoids. We installed a VIN-programmed PCM just like this one, performed the security relearn, and the car ran perfectly. It saved the customer from needlessly replacing a transmission.
Common Symptoms of a Failing PCM
- ✔️ Persistent Check Engine Light (CEL) with various or no specific codes.
- ✔️ Engine stalling or shutting off unexpectedly while driving.
- ✔️ Harsh or erratic automatic transmission shifting.
- ✔️ A complete no-start condition where the engine cranks but won’t fire.
- ✔️ Noticeable decrease in fuel economy.
- ✔️ Misfires or rough idling that can’t be traced to plugs, wires, or coils.
- ✔️ Failure to pass an emissions test.
- ✔️ Communication errors with diagnostic scan tools.
The VIN Programming Advantage
Simply installing a used module from another vehicle will not work. Each PCM is programmed with a Vehicle Identification Number (VIN) and specific software for that car’s options and emissions. Our service eliminates all guesswork. When you purchase this 1998 Grand Prix Powertrain Control Module, you provide us with your VIN. We then flash the module with the latest, most up-to-date GM factory software for your exact vehicle. This ensures:
- Perfect Compatibility: The module works seamlessly with your engine, transmission, and all related systems.
- Optimal Performance: The latest software includes fixes and improvements from GM that your old module may have lacked.
- Simplified Installation: The module arrives ready to be installed. In most cases, the only additional step is a simple security relearn procedure that you can do yourself.
Guaranteed Fitment for Multiple GM Models
This PCM, identified by part number 9357034, is a direct replacement for a wide range of GM vehicles from the late 90s. It is compatible with and supersedes the following service numbers: 09356741, 16236757, 9356741, 9357440, and 9366314. Please verify your vehicle is on the list below to ensure proper fitment.
This part will fit these makes and models with these options:
- 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 have this module programmed?
No. We handle all the programming for you before shipment. After you place your order, simply provide us with your vehicle’s 17-digit VIN, and we will flash the module with the correct GM software for your specific car.
What is a security relearn and is it difficult?
A security relearn, or anti-theft relearn, synchronizes the new PCM with your car’s existing anti-theft system and keys. It’s a simple procedure that does not require any special tools. It typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating this cycle three times. We include instructions with your order.
Where is the PCM located on my 1998 Grand Prix?
On most 1998 Pontiac Grand Prix models, the Powertrain Control Module is located inside the air filter housing assembly in the engine bay. This protects it from heat and the elements. You will need to remove the air filter cover and filter to access it.
Will this part fix my check engine light?
If your check engine light is caused by an internal failure of the PCM, then yes, this part will resolve the issue. However, it is crucial to properly diagnose your vehicle first. The check engine light can indicate problems with many other components. This module will not fix issues related to faulty sensors, wiring, or mechanical problems.
What information do you need from me after I order?
After you complete your purchase, we will need your full 17-digit Vehicle Identification Number (VIN). You can usually find this on your vehicle’s dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.