Restore Peak Performance to Your Vehicle with a VIN-Programmed PCM
Is your 1999 Oldsmobile Alero or another compatible GM vehicle suffering from perplexing issues like rough idling, poor fuel economy, shifting problems, or a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that governs your engine and transmission’s performance. A faulty PCM can disrupt communication between critical systems, leading to a frustrating driving experience and a persistent Check Engine Light. This replacement Powertrain Control Module, part number 9357440, is the definitive solution to restore your vehicle’s factory operation and reliability.
Unlike generic, off-the-shelf modules that require expensive dealership programming, this unit is meticulously prepared for your specific vehicle. Upon purchase, we will request your Vehicle Identification Number (VIN) to flash the module with the latest, most stable software updates directly from GM. This ensures seamless integration with your vehicle’s existing systems, anti-theft security, and specific options. You receive a part that is not just a replacement, but a fully updated component ready for installation, saving you time, money, and the hassle of a trip to the dealer.
From the Diagnostic Bay
We once had a 1999 Grand Am with the 3.4L V6 come in on a tow truck. The owner had replaced the fuel pump, spark plugs, and even the crankshaft position sensor trying to solve an intermittent no-start and stalling issue. The codes were all over the place. After confirming fuel pressure and spark were good, we hooked up our scope to the injector control signals coming from the PCM. We found the signals were dropping out randomly. We installed a VIN-programmed PCM, performed the security relearn, and the car fired right up and ran perfectly. It’s a powerful reminder that when multiple, unrelated systems seem to be failing, the central computer is often the root cause.
Symptoms of a Failing 1999 Alero Powertrain Control Module
If your vehicle’s main computer is on the fritz, it can manifest in numerous ways. Keep an eye out for these common indicators that point to a needed PCM replacement:
- ✔ Check Engine Light: The most obvious sign, often with codes related to sensors, emissions, or internal module failure.
- ✔ Engine Performance Issues: Stalling, rough idling, misfiring, hesitation during acceleration, or a noticeable loss of power.
- ✔ Poor Fuel Economy: The PCM controls the air-fuel mixture; a failure can cause the engine to run too rich or too lean, drastically reducing MPG.
- ✔ Transmission Problems: Harsh or erratic shifting, or the transmission getting stuck in one gear (limp mode).
- ✔ No-Start Condition: The engine may crank but fail to start because the PCM isn’t properly controlling the fuel injectors or ignition coils.
- ✔ Intermittent Electrical Problems: Seemingly random issues with gauges or other electronic components can sometimes be traced back to a faulty PCM.
A Reliable, Plug-and-Play Solution
This module is a direct replacement for a wide range of 1998 and 1999 GM vehicles, including the Oldsmobile Alero, Pontiac Grand Am, Buick Century, and Chevrolet Malibu, among others. It is compatible with multiple service numbers, including 09356741, 16236757, 9357034, and 9366314, ensuring broad applicability. The process is simple: place your order, provide us with your VIN, and we handle the complex programming. Once you receive the part, installation is straightforward. In many cases, a simple security relearn procedure (which can often be done without special tools) is all that’s needed to get your car back on the road. Don’t let a failing computer keep your car sidelined. Restore its drivability and efficiency with this precisely prepared 1999 Alero Powertrain Control Module.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to program the PCM with the correct software for your car’s specific engine, transmission, and options package. This ensures perfect compatibility and function right out of the box.
Is this part difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery and swapping the old module with the new one. However, after installation, you will likely need to perform a security relearn procedure to sync the new PCM with your vehicle’s anti-theft system. Instructions for this are widely available online or in service manuals.
Will this fix my check engine light?
If the check engine light and associated codes are caused by a faulty PCM, then yes, this replacement part will resolve the issue. We always recommend a proper diagnosis to confirm the PCM is the root cause before ordering.
How do I know if this part number is compatible?
This module, 9357440, directly replaces several service numbers including 09356741, 16236757, 9357034, and more. Please check the extensive fitment list on this page to confirm compatibility with your specific year, make, and model.
What happens after I place my order?
After you complete your purchase, we will contact you to request your vehicle’s VIN. Once we receive it, our technicians will program the module with the latest GM software specific to your car and ship it out to you promptly.