Is your Chevrolet Cavalier, Sunfire, or Malibu running rough, stalling, or showing a persistent Check Engine Light? A failing Engine Control Module (ECM) is often the culprit, leading to frustrating performance issues and a car you can’t rely on. Get back on the road with confidence with this fully programmed ECM, designed to restore your vehicle’s original performance and reliability.
This unit is a direct-fit replacement, professionally flashed with the latest official GM software updates specifically for your vehicle’s Vehicle Identification Number (VIN). This critical programming step ensures that the computer communicates perfectly with your engine, transmission, and security system, making installation a straightforward, plug-and-play process. Don’t settle for a generic computer that will cause more problems; get the correctly programmed 2003-2005 Cavalier ECM you need to solve the problem right the first time.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a faulty ECM is a likely cause:
- Erratic engine performance, including misfires or rough idling
- Poor fuel economy
- Vehicle failing to start or stalling intermittently
- Check Engine Light (CEL) with communication-related Diagnostic Trouble Codes (DTCs)
- Inability to pass an emissions test
- Harsh or incorrect shifting from the automatic transmission
This programmed ECM is the definitive solution, addressing the root cause of these electronic failures and restoring the precise engine management your vehicle requires.
Features & Benefits
- โ Plug & Play Installation: Arrives pre-programmed to your specific VIN. No expensive dealer trips or special tools required for programming.
- โ Updated GM Software: Flashed with the newest vehicle software from General Motors to optimize engine efficiency, performance, and emissions.
- โ Guaranteed Compatibility: By using your VIN, we ensure this ECM is a perfect match for your vehicle’s factory options and security system.
- โ Cost-Effective Repair: Get a reliable, tested component for a fraction of the cost of a new unit from the dealership, without sacrificing quality.
- โ One-Year Replacement Warranty: This unit is backed by our one-year replacement warranty for your peace of mind.
Expert Insight: Why VIN Programming is Non-Negotiable
As a technician, I’ve seen countless DIYers get stuck after installing a used computer from a salvage yard. Why? Because on these GM vehicles, the ECM is tied directly to the car’s anti-theft system (Passlock) and specific options. Simply swapping the box will result in a no-start condition every time. Our VIN programming service isn’t just a convenienceโit’s essential. We pre-load your car’s unique identity onto the module, so it’s recognized by the other systems instantly. This is the secret to a successful, hassle-free repair that gets you back on the road without towing it to a shop.
Take the guesswork out of your repair. By ordering this pre-programmed 2003-2005 Cavalier ECM, you are getting a complete, ready-to-install solution that restores your vehicle’s factory operation. Provide your VIN after purchase, and we’ll handle the complex part so you can focus on the simple installation.
Frequently Asked Questions
Do I need to do any programming myself?
No. This ECM comes fully programmed to the VIN you provide. The unit is ready for installation right out of the box, with no additional flashing or programming required.
How and when do I provide my VIN?
After you complete your purchase, you will need to send us a message with your vehicle’s 17-digit VIN. We cannot ship the part until we receive this information, as it is required for the programming process.
Is this a new part?
No, this is a high-quality, thoroughly inspected used ECM that has been sourced from a salvaged vehicle. Each unit is tested to ensure full functionality before being programmed and shipped.
My original part number is 12576162. Will this 19210073 part work?
Yes. Part numbers 12576162 and 19210073 are interchangeable hardware. The critical factor is the VIN-specific software we program onto the unit, which makes it a perfect match for your vehicle’s requirements.
What is the warranty on this ECM?
This unit is backed by our one-year replacement warranty. Should you have any issues with the part within one year of purchase, we will provide a replacement.
Will this fix my car’s specific issue?
This 2003-2005 Cavalier ECM is the correct part to fix a wide range of computer-related engine and transmission problems. However, we always recommend a proper diagnosis by a qualified mechanic to confirm the ECM is the point of failure before purchasing.