Programmed 1998 Silhouette PCM Powertrain Control Module 9356741

Restore Peak Performance to Your GM Vehicle

If your 1998 Oldsmobile Silhouette or other compatible GM vehicle is suffering from perplexing issues like stalling, erratic shifting, poor fuel mileage, or a stubborn check engine light, the root cause is often a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM governs everything from fuel injection and ignition timing to transmission shift points. When it falters, the entire driving experience is compromised. This isn’t just an inconvenience; it can be a significant safety and reliability concern.

This is a direct-replacement PCM, service number 9356741, which arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We handle the complex part for you. By flashing the module with the latest official GM software updates, we ensure it communicates flawlessly with your vehicle’s systems right out of the box. This eliminates the need for an expensive trip to the dealership for programming, saving you both time and money.

Is Your Vehicle Showing These Signs of PCM Failure?

A faulty PCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your vehicle’s computer needs attention:

• ✔ Persistent Check Engine Light (CEL), sometimes with codes like P0601, P0602, or P0605 (Internal Control Module Errors).
• ✔ Engine stalling, stumbling, or hesitating during acceleration.
• ✔ Rough or inconsistent idling.
• ✔ Harsh or erratic automatic transmission shifting.
• ✔ A noticeable decrease in fuel economy.
• ✔ The vehicle cranks but refuses to start (no-start condition).
• ✔ Failure to pass state emissions testing.

A Straightforward Guide to Installation

Installing your new 1998 Silhouette PCM is a job most DIYers can handle with basic tools. The key benefit is that no post-installation programming is required!

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
2. Locate the PCM: On the 1998 Oldsmobile Silhouette and vans like it, the PCM is typically found in the left-hand (driver’s side) of the engine compartment, often near the air filter housing.
3. Disconnect the Harnesses: Carefully unclip and remove the electrical wiring harnesses connected to the old module. These connectors have locking tabs that may need to be gently pried or squeezed to release.
4. Remove the Old Module: Unbolt the PCM from its mounting bracket. Keep the hardware, as you may need to reuse it.
5. Install the New PCM: Mount your new, pre-programmed module in place and securely fasten it.
6. Reconnect Everything: Plug the wiring harnesses back into the new PCM until they click firmly into place. Reconnect the negative battery terminal.
7. Final Step: Some vehicles require a security relearn procedure, which typically involves turning the key to the ‘On’ position for 10-15 minutes. Consult your vehicle’s service information for specific steps if needed. Start the engine and enjoy restored performance.

Verified Vehicle Compatibility

This module is a direct replacement for service numbers 09356741, 16236757, 9357034, 9357440, and 9366314. It is guaranteed to fit the following vehicles: