Is your 1998 Pontiac Grand Prix or another compatible GM vehicle suffering from perplexing issues like a persistent check engine light, rough idling, poor fuel economy, or even a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. This replacement PCM, part number 16236757, is the definitive solution to restore your vehicle’s performance, reliability, and drivability. It arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN), ensuring a seamless, plug-and-play installation process.
From the Diagnostic Bay
We had a 1998 Buick LeSabre come in with a P0300 random misfire code that just wouldn’t go away. The owner had already replaced the spark plugs, wires, ignition coils, and even the fuel injectors. The car ran rough, hesitated on acceleration, and failed its emissions test. After hours of chasing wires and testing sensors, we hooked up our scope to the injector drivers at the PCM. We found that the signal for cylinder 3 was erratic. We swapped in one of our pre-programmed PCMs, performed the security relearn, and the engine smoothed out instantly. The misfire was gone. It’s a textbook case of how a failing computer can mimic a mechanical problem, costing the owner hundreds in unnecessary parts before finding the true cause.
Is Your Vehicle Exhibiting These Symptoms?
A faulty PCM can manifest in numerous ways, often being misdiagnosed as other component failures. If you’re experiencing any of the following, your PCM is the likely culprit:
- โ Check Engine Light is on with various trouble codes (DTCs).
- โ Engine stalls, stumbles, or runs rough.
- โ Noticeable decrease in fuel efficiency.
- โ Transmission shifting issues, such as harsh or delayed shifts.
- โ The vehicle fails to start, even with a good battery and starter.
- โ Communication errors with diagnostic scan tools.
- โ Failure to pass state emissions testing.
The Plug-and-Play Solution for Your 1998 Grand Prix PCM
Don’t let a complex computer replacement intimidate you. We’ve simplified the process. When you order this module, you provide us with your vehicle’s VIN. Our technicians then use this information to flash the unit with the latest, most stable software updates directly from GM. This critical step ensures that the PCM is perfectly matched to your vehicle’s specific configuration, including engine size, transmission type, and factory options. This eliminates the need for an expensive trip to the dealership for programming, saving you time and money.
This module is a direct replacement for several service numbers, ensuring wide compatibility. It is a reliable replacement for the following part numbers: 09356741, 16236757, 9356741, 9357034, 9357440, and 9366314. Once installed, your vehicle will operate as the manufacturer intended, with restored engine performance and transmission logic.
Full Vehicle Compatibility List:
This Powertrain Control Module is compatible with a wide range of GM vehicles. Please verify your model and options below:
- 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; with matching ID
- EIGHTY EIGHT 98 Electronic Control Module
- FIREBIRD 98 Electronic Control Module; 6-231 (3.8L)
- GRAND AM 98 Electronic Control Module; 6-191 (3.1L)
- GRAND AM 99 Electronic Control Module; (LH center dash), 3.4L, with matching 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 PCM programmed?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN at checkout, and the module will arrive ready to install.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your specific car. It tells us everything about your vehicle’s factory options, engine, and transmission. We use it to load the exact correct GM software onto your PCM for perfect compatibility.
Is this a difficult part to install?
The physical installation is typically straightforward, involving disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. However, after installation, you may need to perform a security relearn procedure (also known as a VATS relearn) to sync the new PCM with your vehicle’s anti-theft system. This procedure is simple and can be done without special tools.
Will this fix my check engine light?
If the check engine light and associated symptoms are caused by a faulty PCM, then yes, this part is the correct fix. It’s crucial to properly diagnose the issue first, as other failing sensors or components can sometimes cause similar problems.
What if I have a different part number on my old module?
This module replaces several service numbers, including 09356741, 16236757, 9357034, 9357440, and 9366314. As long as your original part number is on this list, this module is the correct replacement for your vehicle.