Restore Peak Performance to Your Vehicle’s Engine
Is your 1998 Buick Skylark, or another compatible GM vehicle, suffering from erratic engine behavior, poor fuel economy, or a persistent check engine light? These are classic signs of a failing Powertrain Control Module (PCM), the central computer responsible for managing your engine’s performance, emissions, and transmission functions. A faulty PCM can lead to a cascade of frustrating issues, from rough idling and stalling to incorrect transmission shifting. This replacement Powertrain Control Module, service number 9357440, is the definitive solution to restore your vehicle’s factory performance and reliability.
Unlike generic modules that require expensive dealership programming, this unit is meticulously programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. We install the latest GM-certified software updates, ensuring optimal fuel efficiency, emissions compliance, and engine longevity. This VIN-specific programming makes installation straightforward, eliminating the need for complex and costly tools or a trip to the mechanic for flashing. Simply provide your VIN after purchase, and we handle the rest, delivering a module that is ready to be installed right out of the box.
We had a 1998 Grand Prix come into the shop with a complaint of harsh shifting and an intermittent check engine light. The owner had already replaced the transmission fluid, filter, and two shift solenoids based on advice from online forums, but the problem persisted. After hooking up our professional scan tool, we noticed erratic data coming from the PCM’s output to the transmission. The module itself was sending incorrect signals, causing the harsh shifts. Instead of continuing to throw parts at the problem, we installed a VIN-programmed PCM. On the first test drive, the transmission shifted smoothly, the check engine light was gone, and the car drove like new. It’s a powerful reminder that the PCM is the brain, and when it’s not working right, it can mimic a dozen other mechanical failures.
Common Symptoms of a Failing 1998 Skylark PCM
- ✔ Persistent Check Engine Light (CEL) that won’t clear or returns immediately.
- ✔ Unexplained drops in fuel economy.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ Harsh or delayed automatic transmission shifting.
- ✔ Failure to pass state emissions testing.
- ✔ Communication errors with diagnostic scan tools.
- ✔ No-start condition where the engine cranks but won’t fire up.
Guaranteed Compatibility and Fitment
This module is a direct replacement for a wide range of GM vehicles from the late 90s. It is compatible with multiple service numbers, including 09356741, 16236757, 9356741, 9357034, 9357440, and 9366314. Please verify your part number or consult the list below to ensure proper fitment for your vehicle.
This part will fit these makes and models with these options:
- ACHIEVA 98 Electronic Control Module; 6-191 (3.1L)
- ALERO 99 Electronic Control Module; (LH center dash), 3.4L, ID 16236757
- ALERO 99 Electronic Control Module; (LH center dash), 3.4L, ID 9356741
- ALERO 99 Electronic Control Module; (LH center dash), 3.4L, ID 9357440
- BONNEVILLE 98 Electronic Control Module
- CAMARO 98 Electronic Control Module; 6-231 (3.8L)
- CENTURY 98 Electronic Control Module; (6-191, 3.1L)
- CUTLASS 98 Electronic Control Module
- CUTLASS 99 Electronic Control Module; (LH center dash), ID 16236757
- EIGHTY EIGHT 98 Electronic Control Module
- FIREBIRD 98 Electronic Control Module; 6-231 (3.8L)
- GRAND AM 98 Electronic Control Module; 6-191 (3.1L)
- GRAND AM 99 Electronic Control Module; (LH center dash), 3.4L, ID 16236757, 9356741, 9366314, 9357034, 9347440
- GRAND PRIX 98 Electronic Control Module
- INTRIGUE 98 Electronic Control Module
- LESABRE 98 Electronic Control Module; (6-231, 3.8L)
- LUMINA CAR 98 Electronic Control Module; (LH engine compartment)
- MALIBU 98 Electronic Control Module; 6-191 (3.1L)
- MONTE CARLO 98 Electronic Control Module
- PARK AVENUE 98 Electronic Control Module; (6-231, 3.8L)
- REGAL 98 Electronic Control Module
- RIVIERA 98 Electronic Control Module; (6-231, 3.8L)
- SILHOUETTE 98 Electronic Control Module; (LH engine compartment)
- SKYLARK 98 Electronic Control Module; 6-191 (3.1L)
- TRANS SPORT 98 Electronic Control Module; (LH engine compartment)
- VENTURE 98 Electronic Control Module; (6-207, 3.4L)
Frequently Asked Questions
How do I provide my vehicle’s VIN?
After completing your purchase, you will receive instructions on how to send us your 17-digit VIN. You can typically reply to your order confirmation email or use the contact form on our website. We cannot ship your part until we receive this information.
Is this part difficult to install?
For most models, the PCM is located in the engine bay or under the dashboard and is accessible with basic hand tools. After physical installation, you may need to perform a simple security relearn procedure, which can be done without special tools and instructions are widely available online. Always disconnect the battery before starting work.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, this part is the correct solution. However, the check engine light can be triggered by many other components. We recommend having your vehicle scanned for diagnostic trouble codes (DTCs) to confirm the PCM is the likely cause before ordering.
What if I install it and it doesn’t solve my problem?
We guarantee that our module is professionally programmed and fully functional. Automotive diagnostics can be complex. If the module does not resolve your issue, it’s likely that the root cause lies with another component of the vehicle. Please consult our warranty and return policy for more details.
Does this module come with the latest software from GM?
Yes. We flash every module with the most current, stable software updates provided by General Motors for your specific VIN. This ensures your vehicle benefits from any improvements made since it was originally manufactured.