Restore Peak Performance to Your 1998 Oldsmobile Eighty Eight
Is your 1998 Oldsmobile Eighty Eight suffering from perplexing issues like a persistent check engine light, erratic shifting, poor fuel economy, or even a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing the engine and transmission functions. When it falters, the entire driving experience is compromised. This replacement PCM, part number 9357034, is the definitive solution to restore your vehicle’s reliability and performance.
This isn’t just a generic part off the shelf. We provide a fully programmed module specific to your vehicle. Upon purchase, you will provide us with your vehicle’s VIN. Our technicians will then flash the module with the latest, most stable GM-approved software updates for your exact car. This ensures seamless integration, optimal performance, and eliminates the need for expensive programming at a dealership. It’s a plug-and-play solution designed to get you back on the road quickly and confidently.
From the Diagnostic Bay
We had a 1998 LeSabre (which uses the same family of PCM) come into the shop with a complaint of harsh, unpredictable shifting and a check engine light that multiple shops couldn’t solve. The owner had already replaced the transmission fluid, filter, and even a solenoid pack with no improvement. After hooking up our scanner, we noticed erratic data coming from the PCM’s transmission control circuits. Instead of a costly transmission rebuild, we suggested a VIN-programmed PCM. After a straightforward installation and a quick CASE relearn, the car shifted like it just rolled off the factory floor. It’s a perfect example of how what seems like a major mechanical failure can often be traced back to the vehicle’s central computer.
Common Symptoms of a Failing 1998 Eighty Eight PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Harsh, erratic, or delayed automatic transmission shifting.
- ✔ Noticeable decrease in fuel economy.
- ✔ Engine stumbling, stalling, or rough idling.
- ✔ Intermittent or complete no-start condition.
- ✔ Failure to pass state emissions testing.
- ✔ Communication errors with diagnostic scan tools.
Why Choose Our Programmed 1998 Eighty Eight PCM?
Getting the right part is only half the battle; ensuring it works correctly is what truly matters. Our process is designed for your success. By programming the module with your VIN, we ensure all factory settings, including those for the engine, transmission, and anti-theft system (VATS/Passlock), are correctly configured. This module is a direct replacement for a wide range of GM vehicles from that era, making it a versatile and reliable choice for your repair.
Guaranteed Compatibility
This module is a direct replacement for service numbers: 09356741, 16236757, 9356741, 9357034, 9357440, and 9366314. It is confirmed to fit the following vehicles:
- ALERO 99 (LH center dash), 3.4L
- BONNEVILLE 98
- CAMARO 98 (6-231, 3.8L)
- CENTURY 98 (6-191, 3.1L)
- CUTLASS 98-99
- EIGHTY EIGHT 98
- FIREBIRD 98 (6-231, 3.8L)
- GRAND AM 98-99
- GRAND PRIX 98
- INTRIGUE 98
- LESABRE 98 (6-231, 3.8L)
- LUMINA CAR 98 (LH engine compartment)
- MALIBU 98 (6-191, 3.1L)
- MONTE CARLO 98
- PARK AVENUE 98 (6-231, 3.8L)
- REGAL 98
- RIVIERA 98 (6-231, 3.8L)
- SILHOUETTE 98 (LH engine compartment)
- SKYLARK 98 (6-191, 3.1L)
- TRANS SPORT 98 (LH engine compartment)
- VENTURE 98 (6-207, 3.4L)
Please ensure your vehicle is on this list and that your existing module’s service number matches one of the compatible numbers provided.
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians use this number to access the official GM database and flash the module with the correct software for your specific vehicle configuration, ensuring a perfect match.
Is this a plug-and-play part?
Yes, for most functions. Because it is programmed to your VIN, it will control the engine and transmission correctly upon installation. However, on many GM vehicles of this era, you may need to perform a security relearn procedure (for the anti-theft system) and a Crankshaft Variation (CASE) relearn. These procedures can often be done without special tools, and instructions are widely available online.
Will this fix my transmission shifting problems?
If the root cause of your shifting issues is a faulty PCM, then yes, this part is the correct solution. The PCM controls shift points and line pressure. A failing module is a very common cause of harsh or erratic shifting in these vehicles.
Where is the PCM located on my 1998 Eighty Eight?
On the 1998 Oldsmobile Eighty Eight, the Powertrain Control Module is typically located inside the vehicle, behind the right side of the dashboard or kick panel. Always disconnect the battery before attempting to remove or install the module.
What if my original part number isn’t listed?
The part number 9357034 and the other service numbers listed are interchangeable. As long as your vehicle model and year are on the compatibility list, this module will function correctly once programmed to your VIN.