Restore Your Vehicle’s Performance and Reliability
Is your 1999 Oldsmobile Alero or other compatible GM vehicle suffering from perplexing issues like a persistent check engine light, erratic engine behavior, poor fuel economy, or even a no-start condition? 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 problems, making your vehicle unreliable and frustrating to drive. This replacement PCM, part number 9366314, is the definitive solution to restore your vehicle’s factory performance and get you back on the road with confidence.
This isn’t just a generic, off-the-shelf part. We provide a fully programmed module tailored specifically to your vehicle. Upon purchase, you will provide us with your Vehicle Identification Number (VIN). Our technicians will then flash the module with the latest GM-certified software updates for your exact make, model, and engine configuration. This critical programming step ensures seamless communication between the PCM and all other vehicle systems, eliminating the need for an expensive trip to the dealership for programming. It’s a plug-and-play solution designed for a straightforward installation.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or misfiring.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ The vehicle fails to start, even with a good battery and starter.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
Expert Pro Tip
Expert Pro Tip
Before condemning your PCM, always perform a thorough check of the basics. Ensure your battery is fully charged and the terminals are clean and tight. Inspect the main engine ground straps for corrosion or looseness. A poor ground connection can mimic many PCM failure symptoms and is a much simpler fix. Verifying solid power and ground to the module can save you time and money.
Why Choose Our Programmed 1999 Alero PCM?
Choosing the right replacement computer is crucial. Our process is designed to provide a reliable, long-term fix. We use your VIN to load the correct operational software, ensuring all parameters—from fuel injector pulse width to ignition timing and transmission shift points—are set to your vehicle’s original specifications. This meticulous programming makes our 1999 Alero PCM a superior choice over generic or un-programmed modules that can cause more problems than they solve. This module is a direct replacement for service numbers 09356741, 16236757, 9357034, 9357440, and 9366314, offering broad compatibility across a range of GM models from the late 90s.
Installation is typically straightforward. After disconnecting the battery, the PCM is usually located in the engine bay or under the dashboard. Simply unbolt the old unit, disconnect the wiring harnesses, and install the new one in its place. Once connected and the battery is reconnected, you may need to perform a simple security relearn procedure (often called a VATS relearn), which can typically be done without special tools. Instructions for this procedure are widely available online or in service manuals. By purchasing this pre-programmed 1999 Alero PCM, you are not just buying a part; you are getting a complete solution that restores the heart of your vehicle’s electronic management system.
Frequently Asked Questions
Expert Pro Tip
Before condemning your PCM, always perform a thorough check of the basics. Ensure your battery is fully charged and the terminals are clean and tight. Inspect the main engine ground straps for corrosion or looseness. A poor ground connection can mimic many PCM failure symptoms and is a much simpler fix. Verifying solid power and ground to the module can save you time and money.