Restore Peak Performance to Your GM 2.2L Engine
Is your Chevrolet Cavalier, Pontiac Sunfire, or other GM vehicle running poorly? A faulty Engine Control Module (ECM) is often the hidden culprit behind a host of frustrating issues, from a persistent check engine light to a car that won’t start at all. This genuine OEM Engine Control Module, part number 12576162 (interchangeable with 19210073), is the direct-fit, reliable solution to get your vehicle running smoothly again. We take the guesswork and extra expense out of the repair by programming the module to your vehicle’s specific VIN before it ships. This means no costly trips to the dealership for programming—it arrives ready for installation.
From the Diagnostic Bay
We had a 2004 Pontiac Sunfire come into the shop with a classic complaint: intermittent stalling at stoplights and a check engine light that mechanics had been chasing for weeks. The owner had already replaced the spark plugs, ignition coils, and even the crankshaft position sensor, but the problem persisted. A deep dive with our diagnostic scanner revealed communication errors with the ECM. Instead of throwing more parts at it, we sourced a quality used module, programmed it to the car’s VIN, and installed it. The stalling vanished, the codes cleared, and the car ran like new. It’s a perfect example of how correctly identifying the ‘brain’ of the engine as the root cause can save hundreds of dollars in unnecessary parts and labor.
Common Symptoms of a Failing 2003-2005 Cavalier ECM
If your vehicle is experiencing any of the following issues, a failing engine computer may be to blame. This module is the central command for your engine’s operation, and when it fails, performance suffers dramatically.
- ✔ Persistent Check Engine Light (CEL) with various codes
- ✔ Engine stalling, stumbling, or hesitating during acceleration
- ✔ Rough idle or engine misfires
- ✔ Complete no-start or intermittent starting condition
- ✔ Noticeable decrease in fuel economy
- ✔ Failure to communicate with diagnostic scan tools
- ✔ Inconsistent or erratic automatic transmission shifting
Plug-and-Play Solution: Programmed to Your VIN
The biggest hurdle in replacing a modern vehicle’s computer is the need for vehicle-specific programming. We eliminate this step for you. When you purchase this 2003-2005 Cavalier ECM, simply provide us with your vehicle’s 17-digit VIN. Our technicians will flash the module with the latest GM-certified software calibration for your exact vehicle. This ensures all components, from the engine and transmission to the anti-theft system, communicate correctly right out of the box. While the module is plug-and-play, some vehicles may require a simple, on-vehicle security relearn procedure, which can typically be done without special tools.
Guaranteed Fitment
This ECM is a direct replacement for part number 12576162 or 19210073 and is guaranteed to fit the following vehicles equipped with the 2.2L engine:
- Chevrolet Cavalier: 2003, 2004, 2005
- Pontiac Sunfire: 2003, 2004, 2005
- Chevrolet Malibu: 2004, 2005 (Classic models, VIN ‘N’)
- Pontiac Grand Am: 2003, 2004, 2005
- Oldsmobile Alero: 2003, 2004
This is a high-quality, tested part sourced from a salvaged vehicle, offering OEM reliability at a fraction of the cost of a new unit. Don’t let a faulty ECM keep you off the road. Order today, provide your VIN, and get the correct, programmed part delivered to your door.
Frequently Asked Questions
Do I need to get this ECM programmed by a dealer?
No. We handle all the programming for you before we ship the part. All we need is your vehicle’s 17-digit VIN to load the correct software for your specific car. This saves you time and money.
Where is the ECM located on my 2004 Cavalier or Sunfire?
For the 2003-2005 Chevrolet Cavalier and Pontiac Sunfire, the ECM is located in the engine compartment on the right-hand (passenger) side, near the rear firewall.
Is this a new computer?
No, this is a fully functional, tested OEM part that has been carefully removed from a salvaged vehicle. This ensures a perfect fit and reliable operation, as it is a genuine factory component.
What information do you need from me after I order?
After you complete your purchase, you will need to provide us with your vehicle’s full 17-digit Vehicle Identification Number (VIN). This is essential for us to program the module correctly.
Will I need to perform any other procedures after installation?
In some cases, a security relearn procedure (also known as a Passlock or anti-theft relearn) may be necessary for the vehicle to start. This is a standard GM procedure that syncs the new ECM to your car’s anti-theft system and can often be done without any special tools. Instructions are widely available online.