Is Your 1999 Alero or Grand Am Running Rough?
If you’re dealing with a frustrating check engine light, poor fuel economy, stalling, or unpredictable engine behavior in your 1999 Oldsmobile Alero or Pontiac Grand Am, a failing Engine Control Module (ECM) is a likely culprit. The ECM is the central computer of your vehicle, managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it starts to fail, it can cause a cascade of problems that are often difficult to diagnose, leading to wasted time and money on unnecessary repairs.
Why Choose Our Programmed 1999 Alero ECM?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and hassle out of the repair process. Each ECM, part number 09361733, is meticulously programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the computer has the correct software and calibrations for your car’s exact configuration, including its engine, transmission, and factory options. We load the latest software updates from GM, which can often resolve underlying drivability issues that were present even before the original module failed.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Engine stalling or shutting off while driving
- ✔ Rough or erratic idling
- ✔ Noticeable decrease in fuel efficiency
- ✔ Harsh or incorrect automatic transmission shifting
- ✔ Misfire codes (e.g., P0300, P0301) even after a tune-up
- ✔ Complete no-start condition where the engine cranks but won’t fire
- ✔ Communication errors with diagnostic scan tools
Plug-and-Play Installation
Our goal is to make your repair as simple as possible. Because this module comes programmed to your VIN, it eliminates the need for an expensive trip to the dealership for programming. The physical installation is straightforward for a DIY mechanic. The ECM is located on the left-hand (driver’s) side of the center dash. After swapping the hardware, you will need to perform a simple security relearn procedure. This procedure syncs the new ECM with your vehicle’s anti-theft system and does not require any special tools. Instructions are readily available online and typically involve a sequence of turning the key on and off.
Vehicle Fitment:
This ECM is a direct-fit replacement for the following vehicles equipped with the 3.4L V6 engine and matching part number:
- 1999 Oldsmobile Alero (with 3.4L engine, ID 09361733)
- 1999 Pontiac Grand Am (with 3.4L engine, ID 09361733)
Please verify that your original module’s part number is 09361733 or 9361733 to ensure compatibility. After placing your order, simply provide us with your VIN, and we’ll handle the programming. Get your car back on the road and running reliably with this quality-tested and properly prepared 1999 Alero ECM.
Frequently Asked Questions
What is an ECM and what does it do?
The ECM, or Engine Control Module, is your car’s main computer. It controls and monitors the engine’s performance, fuel economy, and emissions by reading data from various sensors and adjusting parameters like fuel mixture and spark timing.
Is this part difficult to install?
The physical installation is straightforward for someone with basic mechanical skills. It’s located inside the car on the driver’s side of the center dash. The most important step after installation is the security relearn procedure, which can be done at home without special tools.
What is the security relearn procedure?
It’s a simple process that syncs the new ECM to your car’s anti-theft system (Passlock/Passkey). It usually involves turning the ignition key to the ‘ON’ position for about 10 minutes, then ‘OFF’, and repeating this sequence three times. This allows the components to recognize each other.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information, as the programming is specific to your car.
Will this fix my check engine light?
If the check engine light and other symptoms are being caused by a faulty ECM, then yes, this part will resolve those issues. However, it’s always recommended to have your vehicle properly diagnosed to ensure the ECM is the root cause of the problem.