Restore Peak Performance to Your GM Vehicle
Is your 1998-1999 Pontiac Grand Am, Oldsmobile Alero, or other GM vehicle suffering from frustrating and unpredictable issues? A faulty Powertrain Control Module (PCM) is often the culprit behind problems like poor fuel economy, erratic shifting, a persistent check engine light, or even a no-start condition. The PCM is the central computer of your vehicle, responsible for managing critical engine and transmission functions. When it fails, the entire system’s performance and reliability are compromised. This replacement PCM, part number 9357440, is the definitive solution to restore your vehicle’s original drivability and efficiency.
The Importance of a Properly Functioning 1998-1999 Grand Am PCM
In vehicles from this era, the PCM orchestrates everything from fuel injector timing and spark advance to transmission shift points and emissions control. A failing module can send incorrect signals, leading to a cascade of issues that can be difficult to diagnose. Mechanics might mistakenly replace sensors or other components, only for the root problem to persist. By replacing the faulty computer with a correctly programmed unit, you are addressing the core of the issue, ensuring all related systems operate in perfect harmony as the manufacturer intended.
From the Diagnostic Bay
We had a 1999 Oldsmobile Alero come in with a complaint of intermittent stalling and a harsh 1-2 shift. The customer had already spent hundreds of dollars replacing the crankshaft position sensor and the transmission solenoids at another shop, but the problem remained. After hooking up our diagnostic scanner, we noticed erratic data streams coming from the PCM. The module’s internal processors were failing under load, causing it to send faulty commands. We installed one of our pre-programmed PCMs, performed the security relearn, and the car drove like new. It’s a classic case where treating the symptom doesn’t fix the disease – you have to replace the brain.
Symptoms of a Failing Powertrain Control Module
- ✔ Check Engine Light: The light is on, and you may have codes related to sensors, emissions, or internal module failure.
- ✔ Poor Engine Performance: Noticeable loss of power, hesitation during acceleration, or rough idling.
- ✔ Reduced Fuel Economy: Your vehicle is suddenly consuming more fuel than usual due to incorrect air/fuel mixture calculations.
- ✔ Transmission Issues: Hard or delayed shifting, or the transmission getting stuck in one gear (limp mode).
- ✔ Intermittent Stalling: The engine may shut off unexpectedly while driving or when coming to a stop.
- ✔ No-Start Condition: The engine cranks but refuses to start, often due to a lack of spark or fuel injector pulse commanded by the PCM.
- ✔ Failed Emissions Test: The PCM controls the emissions systems, and a fault will almost certainly cause a test failure.
A Plug-and-Play Solution Programmed to Your VIN
Don’t settle for a generic, unprogrammed module from a salvage yard that could create more problems. Our process is simple and effective. When you purchase this 1998-1999 Grand Am PCM, you provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians then use this VIN to flash the module with the latest, most up-to-date software directly from General Motors. This ensures that the PCM is a perfect match for your vehicle’s specific configuration, including engine size, transmission type, and factory options. The result is a seamless installation and restored functionality without the need for an expensive trip to the dealership.
After installation, you may need to perform a simple security relearn procedure, which can typically be done in your driveway with just the ignition key. This syncs the new PCM with your vehicle’s anti-theft system.
Guaranteed Compatibility
This module is a direct replacement for service numbers 09356741, 16236757, 9356741, 9357034, 9357440, and 9366314. It is guaranteed to fit and function in the following vehicles:
GRAND AM 98 Electronic Control Module; 6-191 (3.1L)
LESABRE 98 Electronic Control Module; (6-231, 3.8L)
CUTLASS 99 Electronic Control Module; (LH center dash), ID 16236757
PARK AVENUE 98 Electronic Control Module; (6-231, 3.8L)
VENTURE 98 Electronic Control Module; (6-207, 3.4L)
ALERO 99 Electronic Control Module; (LH center dash), 3.4L, ID 16236757
RIVIERA 98 Electronic Control Module; (6-231, 3.8L)
CENTURY 98 Electronic Control Module; (6-191, 3.1L)
SKYLARK 98 Electronic Control Module; 6-191 (3.1L)
GRAND PRIX 98 Electronic Control Module
GRAND AM 99 Electronic Control Module; (LH center dash), 3.4L, ID 16236757
GRAND AM 99 Electronic Control Module; (LH center dash), 3.4L, ID 9356741
ACHIEVA 98 Electronic Control Module; 6-191 (3.1L)
EIGHTY EIGHT 98 Electronic Control Module
SILHOUETTE 98 Electronic Control Module; (LH engine compartment)
FIREBIRD 98 Electronic Control Module; 6-231 (3.8L)
MALIBU 98 Electronic Control Module; 6-191 (3.1L)
GRAND AM 99 Electronic Control Module; (LH center dash), 3.4L, ID 9366314
ALERO 99 Electronic Control Module; (LH center dash), 3.4L, ID 9356741
INTRIGUE 98 Electronic Control Module
LUMINA CAR 98 Electronic Control Module; (LH engine compartment)
GRAND AM 99 Electronic Control Module; (LH center dash), 3.4L, ID 9357034
BONNEVILLE 98 Electronic Control Module
GRAND AM 99 Electronic Control Module; (LH center dash), 3.4L, ID 9347440
CAMARO 98 Electronic Control Module; 6-231 (3.8L)
MONTE CARLO 98 Electronic Control Module
ALERO 99 Electronic Control Module; (LH center dash), 3.4L, ID 9357440
REGAL 98 Electronic Control Module
TRANS SPORT 98 Electronic Control Module; (LH engine compartment)
Frequently Asked Questions
Do I need to do anything after installing this PCM?
Yes. While the module comes programmed for your engine and transmission, you will need to perform a security relearn procedure. This typically involves a sequence of turning the key on and off and can be done without any special tools. We include instructions to guide you through this simple process.
How do I provide my VIN?
After you complete your purchase, you will receive an email prompting you for your vehicle’s 17-digit VIN. You can also add your VIN in the ‘notes’ section during checkout. We cannot ship your part until we receive the VIN.
Is this a new or used part?
This is a high-quality, inspected, and tested recycled OEM part. Each unit is verified to be fully functional before being programmed with the latest GM software for your specific vehicle.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the PCM, then yes, this part will resolve the issue. However, if the light is on due to a separate faulty sensor (like an O2 sensor or MAP sensor), that component will still need to be replaced.
What if my part number is not listed but my vehicle is?
Please contact us with your VIN before ordering. GM uses many interchangeable service numbers. We can verify compatibility to ensure you receive the correct module for your vehicle.