Is Your Grand Am Running Rough? The Solution is Here.
If you’re dealing with a frustrating check engine light, erratic engine behavior, poor fuel economy, or even a no-start condition in your 1998-1999 Pontiac Grand Am, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine, when the PCM has issues, the entire vehicle suffers. This isn’t just a part; it’s the brain of your car’s operation, and getting it right is critical.
A Mechanic’s Real-World Experience
“A customer’s ’99 Grand Am with the 3.4L came into my shop last month with a persistent no-start after it warmed up. The owner had already replaced the crank sensor twice based on a generic code. After a few minutes of diagnostics, I found the 5-volt reference signal from the PCM was dropping out intermittently. The PCM itself was failing internally. We installed one of our pre-programmed modules, and the car fired right up and has been running perfectly ever since. It’s a classic case where chasing codes costs more than diagnosing the root cause โ the computer itself.”
Why Choose Our 1998-1999 Grand Am PCM?
Forget the hassle and high cost of a dealership visit. We provide a direct, reliable solution that gets you back on the road quickly. This module is meticulously tested and prepared to be a direct replacement for your original unit.
- โ VIN Programmed for You: This isn’t a generic, one-size-fits-all part. We flash the module with the latest GM-certified software specific to your vehicle’s VIN. This ensures perfect communication between all onboard systems.
- โ True Plug-and-Play: Because we handle the programming, no additional flashing or dealer-level tools are required. Once it arrives, you can install it and start your car.
- โ Solves Common Issues: A direct solution for false sensor codes, harsh shifting, stalling, and other perplexing electronic problems.
- โ Broad GM Compatibility: This module is a direct replacement for a wide range of popular GM vehicles from this era, restoring factory performance and reliability.
Simple, Straightforward Installation
You can do this. Installing your new PCM is a manageable job for a DIY mechanic with basic tools. Follow these steps for a smooth installation:
- Safety First: Always disconnect the negative terminal from your car battery and wait at least 15 minutes to allow all system capacitors to discharge.
- Locate the PCM: On many 1999 Grand Am and Alero models, the PCM is found inside the vehicle, on the driver’s side of the center dash area. On other models like the Silhouette or Lumina, it’s in the engine compartment. Check your specific vehicle’s service manual if you’re unsure.
- Disconnect the Connectors: Carefully unclip the wiring harness connectors from the old module. Inspect the pins on the harness side for any corrosion or damage. Clean them with a dedicated electronics cleaner if necessary.
- Swap the Modules: Unbolt the old PCM and remove it. Mount the new module securely in its place.
- Reconnect Everything: Firmly plug the wiring harnesses into your new PCM. Ensure they click into place. Reconnect your negative battery terminal.
- Final Check: Turn the key to the ‘On’ position for 10-15 seconds before starting the engine. This allows the other modules to recognize the new PCM. Start the vehicle and check for proper operation.
Guaranteed Fitment and Compatibility
This Powertrain Control Module is a direct replacement for units with the following service numbers. Please verify one of these numbers is on your original part to ensure compatibility.
Service Numbers: 09356741, 16236757, 9356741, 9357034, 9357440, 9366314
This part will fit these makes and models with these options:
- ACHIEVA 98 (6-191, 3.1L)
- ALERO 99 (3.4L, ID 16236757, 9356741, 9357440)
- 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 (6-191, 3.1L)
- GRAND AM 99 (3.4L, ID 16236757, 9356741, 9366314, 9357034, 9347440)
- GRAND PRIX 98
- INTRIGUE 98
- LESABRE 98 (6-231, 3.8L)
- LUMINA CAR 98
- 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
- SKYLARK 98 (6-191, 3.1L)
- TRANS SPORT 98
- VENTURE 98 (6-207, 3.4L)
After your purchase, simply reply to your order confirmation email with your vehicle’s 17-digit VIN, and we will program the module before shipping it to you.