Restore Your Vehicle’s Core Performance and Reliability
Is your Oldsmobile Cutlass, Pontiac Grand Am, or another trusted GM vehicle suddenly giving you trouble? If you’re dealing with a persistent check engine light, unpredictable stalling, rough idling, or poor fuel economy, the problem often points directly to a failing Powertrain Control Module (PCM). As the central computer of your vehicle, a faulty PCM can cause a cascade of frustrating and difficult-to-diagnose issues. This isn’t just an inconvenience; it’s a critical component failure that affects your car’s performance, safety, and emissions.
This replacement PCM, part number 9356741, is the definitive solution. We take the guesswork and high costs out of the repair process. Before we ship your module, we professionally program it with the latest GM software updates, specifically matched to your vehicle’s unique VIN. This means it arrives at your door ready for a straightforward installation, saving you a costly trip to the dealership for programming. Get your car running smoothly again with a reliable, properly configured engine computer.
Is Your Vehicle Showing These Symptoms?
- ✔ Persistent Check Engine Light (CEL) with codes like P0601, P0602, or P0606.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable decrease in fuel mileage.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
Case Study: A Tricky Diagnosis
I remember a 1998 Buick LeSabre that came into the shop with an intermittent no-start condition. The owner had already replaced the battery and alternator. We checked the fuel pressure and spark, which were both inconsistent. The scan tool would sometimes connect, other times it wouldn’t—a classic sign of a communication breakdown. After ruling out wiring issues, we focused on the PCM. The internal processor was failing intermittently, especially when hot. Swapping in a correctly programmed PCM like this one solved the problem instantly. The owner had spent weeks chasing ghosts, when the solution was a reliable central computer.
A Straightforward Guide to Installation
Installing your new 1998-1999 Cutlass PCM is a manageable job for a DIYer with basic tools. Following these steps ensures a smooth process. Note: After installation, a security relearn procedure is often required, which can typically be done without special tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most of these GM models, the PCM is found inside the vehicle’s air filter box in the engine compartment or under the dash on the passenger side. Consult a vehicle-specific repair manual if you’re unsure.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old PCM. These connectors have locking tabs that need to be released. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Seat your new, pre-programmed PCM into the mounting bracket and secure it. Re-attach the wiring harness connectors, ensuring they click firmly into place.
- Reconnect Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: Start the vehicle. If it starts and then immediately stalls, you will need to perform the GM Passlock/Passkey security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine.
Will This Fit My Vehicle?
This module is a direct-fit replacement for a wide range of 1998 and 1999 General Motors vehicles. Please verify your model and engine options below. This part is compatible with service numbers 09356741, 16236757, 9357034, 9357440, and 9366314.
Achieva (98), Alero (99), Bonneville (98), Camaro (98), Century (98), Cutlass (98-99), Eighty Eight (98), Firebird (98), Grand Am (98-99), Grand Prix (98), Intrigue (98), LeSabre (98), Lumina Car (98), Malibu (98), Monte Carlo (98), Park Avenue (98), Regal (98), Riviera (98), Silhouette (98), Skylark (98), Trans Sport (98), Venture (98).
Note: Specific engine and ID number matching is crucial for some models. Please match your service number or contact us with your VIN to confirm.
Frequently Asked Questions
What does “VIN Programmed” mean?
It means we load the module with your vehicle’s specific Vehicle Identification Number (VIN) and the latest official GM software. This ensures the PCM works perfectly with your car’s engine, transmission, and options, eliminating the need for a dealership visit.
Do I need to do anything after installing this 1998-1999 Cutlass PCM?
In most cases, you will need to perform a simple security relearn procedure, also known as a Passkey or Passlock relearn. This procedure syncs the module to your car’s anti-theft system and can be done at home without special tools. Instructions are readily available online or in your owner’s manual.
Is this a new or used part?
This is a high-quality, inspected, and tested original equipment part that has been professionally programmed to function to OEM standards. It provides the same reliability and performance as a new unit from the dealer at a fraction of the cost.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or send it to us in a message. We cannot program and ship your module without it.
Will this fix my check engine light?
If the check engine light is caused by an internal PCM failure (common codes P0601-P0606) or software corruption, this module will resolve the issue. However, you should always diagnose other potential causes, such as faulty sensors, before replacing the PCM.