Is Your 1998 Oldsmobile Silhouette Running Rough?
If you’re dealing with frustrating issues like a persistent check engine light, erratic shifting, poor fuel economy, or even a no-start condition, the problem often points directly to a failing Powertrain Control Module (PCM). As the central computer for your vehicle, when the PCM starts to fail, it can create a host of problems that are difficult to diagnose. After 20+ years on the road, the original electronics are simply at the end of their service life.
Expert Pro Tip: Before condemning your PCM, always check the main ground connections. On these GM vans, the ground strap from the engine block to the chassis can corrode, causing a weak connection. I’ve seen this many times in my shop—a simple cleaning with a wire brush can solve intermittent electrical gremlins that mimic PCM failure. A 10-minute check can save you a lot of diagnostic headaches.
The Direct Solution: A VIN-Programmed 1998 Silhouette PCM
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a high-quality, tested PCM and flash it with the latest GM-certified software specifically for your vehicle’s VIN. This process ensures that all factory parameters for your engine, transmission, and emissions systems are perfectly matched, restoring the performance and reliability you expect.
Common Symptoms of a Failing PCM:
- ✔ Check Engine Light is on with various communication or sensor codes.
- ✔ The engine cranks but refuses to start.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Noticeable drop in fuel mileage.
- ✔ Stalling, stumbling, or hesitation during acceleration.
- ✔ Communication errors with diagnostic scan tools.
Plug-and-Play Installation: No Dealer Visit Required
One of the biggest benefits of our service is the simplicity. Your new module arrives ready to be installed without the need for expensive dealership programming or specialized tools. Just follow these simple steps:
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the Module: On your 1998 Silhouette, the PCM is typically found in the left-hand (driver’s side) of the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. Use a small screwdriver to release the locking tabs if necessary. Then, unbolt the module from its mounting bracket.
- Install the New PCM: Mount the new module and securely reconnect the electrical harnesses. Ensure they click into place.
- Reconnect Battery: Re-attach the negative battery terminal.
- Perform Security Relearn (If Needed): In some cases, a simple 10-minute key-on/key-off procedure is needed for the security system to recognize the new module. Your vehicle’s service manual will have the specific steps.
Guaranteed Compatibility
This module is a direct replacement for a wide range of GM vehicles from this era. It is compatible with the following service part numbers. Please match your original part number to one of these to ensure correct fitment:
Service Numbers: 09356741, 16236757, 9357034, 9357440, 9366314
Vehicle Fitment Details:
This Electronic Control Module fits the following makes and models:
- 1998 Achieva (3.1L)
- 1999 Alero (3.4L – ID 16236757, 9356741, 9357034, 9357440)
- 1998 Bonneville
- 1998 Camaro (3.8L)
- 1998 Century (3.1L)
- 1998-1999 Cutlass
- 1998 Eighty Eight
- 1998 Firebird (3.8L)
- 1998-1999 Grand Am (3.1L, 3.4L)
- 1998 Grand Prix
- 1998 Intrigue
- 1998 LeSabre (3.8L)
- 1998 Lumina Car
- 1998 Malibu (3.1L)
- 1998 Monte Carlo
- 1998 Park Avenue (3.8L)
- 1998 Regal
- 1998 Riviera (3.8L)
- 1998 Silhouette
- 1998 Skylark (3.1L)
- 1998 Trans Sport
- 1998 Venture (3.4L)
After your purchase, please provide us with your vehicle’s 17-digit VIN so we can program the module before shipment. This step is essential for a true plug-and-play experience.