Is Your 1999 Alero or Grand Am Acting Up?
If you’re dealing with frustrating issues like stalling at red lights, a car that cranks but won’t start, erratic shifting, or a persistent check engine light that no other part seems to fix, the problem often points directly to a failing Engine Control Module (ECM). For years in my shop, I’ve seen these GM 3.4L vehicles come in with symptoms that leave owners baffled. The ECM is the brain of your engine, and when it starts to fail, it can create a cascade of confusing and unpredictable problems.
Don’t let a faulty computer keep you off the road. This is your direct, reliable solution—an ECM specifically for your vehicle, identified by part number 09361733 or 9361733.
The Easiest Solution: A Pre-Programmed 1999 Alero ECM
The biggest headache with replacing an ECM has always been the expensive trip to the dealership for programming. We eliminate that step entirely. Before this module ships, we flash it with the latest GM-certified software updates, programmed specifically to your vehicle’s unique Vehicle Identification Number (VIN). This ensures perfect communication between the engine, transmission, and other onboard systems right out of the box.
- ✔ VIN Programmed for You: We handle the complex programming, so you don’t have to. Just provide your VIN after purchase.
- ✔ Latest GM Software: Your ECM arrives with the newest updates, often correcting factory bugs and improving performance and fuel economy.
- ✔ Direct Fit Guarantee: Engineered to be an exact replacement for the 1999 Oldsmobile Alero and Pontiac Grand Am equipped with the 3.4L engine.
- ✔ Solves Common Failures: Cures issues like intermittent no-start conditions, harsh transmission shifting, false sensor codes, and poor engine performance.
- ✔ Skip the Dealer: Save hundreds of dollars and valuable time by avoiding dealership programming fees and appointments.
Real-World Diagnostic Story
“A customer’s 1999 Grand Am came in last week with these exact symptoms—it would run fine for 10 minutes, then suddenly die and refuse to restart for an hour. The fuel pump wasn’t getting its signal. After confirming the pump and relay were good, we hooked up a scope to the ECM’s fuel pump driver circuit and saw the signal drop out as the module heated up. This is a classic internal failure. We installed a VIN-programmed ECM like this one, and the car has been running perfectly ever since. It’s a fix I’ve performed dozens of times on these 3.4L platforms.”
Plug-and-Play Installation: No Dealer Visit Required
Installing your new ECM is a straightforward process that most DIY mechanics can handle in their own garage. Follow these simple steps to get your car running right again.
- Safety First: Always disconnect the negative terminal from your car’s battery and wait at least 10 minutes for the system capacitors to discharge.
- Locate Your Old ECM: On the 1999 Alero and Grand Am, the ECM is located inside the vehicle, on the driver’s side of the center dash console area. You will likely need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical harness connectors. They have locking tabs that need to be released. Once unplugged, unbolt the old module from its mounting bracket.
- Install the New ECM: Mount your new, pre-programmed ECM in the same location. Securely plug in all electrical connectors, ensuring they click into place.
- Reconnect and Start: Reconnect the negative battery terminal. The vehicle may require a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Start the engine and let it idle to allow the computer to sync with all the vehicle’s sensors.
Confirm Your Fitment
This module is a direct replacement for units with part number 9361733 printed on the label. Please verify the part number on your existing computer to ensure a perfect match. This part is compatible with:
- 1999 Oldsmobile Alero (with 3.4L engine, ID 9361733)
- 1999 Pontiac Grand Am (with 3.4L engine, ID 9361733)
Take control of your repair. Order today and we’ll ship a fully programmed, ready-to-install ECM right to your door.