Is Your Late 90s GM Vehicle Running Rough?
If you’re dealing with frustrating, hard-to-diagnose issues like a persistent Check Engine Light, erratic engine performance, harsh transmission shifting, or even a no-start condition, the problem often points directly to a failing Powertrain Control Module (PCM). As a technician with over two decades of experience, I’ve seen these exact symptoms countless times on vehicles like the Cutlass, Grand Am, and LeSabre. The original PCMs from this era are prone to internal component failure over time, leading to a vehicle that’s unreliable and a headache to drive.
This isn’t just a replacement part; it’s a direct solution. We provide a high-quality Powertrain Control Module, part number 9356741, that arrives at your doorstep fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This means it’s loaded with the latest GM factory software updates, ensuring optimal performance and resolving many of the inherent software bugs from the late 90s.
Expert Pro Tip: Check Before You Replace
Before you condemn your PCM, take a moment to inspect the main wiring harness connectors that plug into the module. Over the years, the plastic can become brittle and the terminal pins can develop a thin layer of corrosion, causing intermittent connection issues that mimic a failing PCM. Unplug the connectors (with the battery disconnected!) and use a quality electronics cleaner spray on both the harness and module pins. A poor connection here is a common misdiagnosis I’ve seen cost people time and money.
Why Choose Our Programmed 1998-1999 Cutlass PCM?
Getting your car back on the road shouldn’t be complicated. We handle the complex part—the programming—so you can focus on the straightforward installation.
- ✔ VIN-Specific Programming: We flash the module with the newest GM software calibrated specifically for your car. Just provide your VIN at checkout.
- ✔ No Dealer Visit Required: This module is ready to install right out of the box. You save hundreds of dollars and the hassle of having your car towed to a dealership for programming.
- ✔ Solves Common GM Drivability Issues: Directly addresses problems like false sensor codes, poor fuel economy, hesitation, and erratic transmission behavior.
- ✔ Broad Compatibility: This unit is a direct replacement for a wide range of 1998-1999 General Motors vehicles. Please verify your part number.
Simple, Plug-and-Play Installation
You don’t need to be a master mechanic to install this part. While the location varies slightly by model (e.g., under the dash in an Alero, in the engine bay for a Lumina), the process is generally the same.
- Safety First: Always disconnect the negative terminal from your car’s battery and wait 10 minutes for the system to discharge.
- Locate the Old PCM: Find your current PCM. It’s a metal box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed PCM into place. Securely reconnect the wiring harnesses, ensuring they click into place.
- Reconnect Battery: Re-attach the negative battery terminal. The vehicle may need to complete a drive cycle for all systems to normalize.
Confirm Your Part Number
This module is a direct replacement for several service numbers. To ensure compatibility, please match one of the following numbers from your original part: 09356741, 16236757, 9357034, 9357440, or 9366314. This is the most reliable way to guarantee a perfect fit for your vehicle.