The Brain of Your Vehicle’s Engine: The Engine Control Module
Is your 2017-2020 Chevrolet Impala, or another compatible GM vehicle, suffering from perplexing issues like stalling, poor fuel economy, or a persistent Check Engine Light? The problem might lie with the very core of its operating system: the Engine Control Module (ECM). The ECM, often called the engine computer, is the master controller for your vehicle’s engine. It precisely manages critical functions like fuel injection, ignition timing, emissions systems, and transmission shifting to ensure optimal performance, efficiency, and reliability. When it begins to fail, the symptoms can be widespread and frustrating, often mimicking other mechanical problems.
A Direct Solution, Programmed for Your Vehicle
This genuine GM Engine Control Module, part number 12667189 (also compatible with 12667002 and 12666070), is the definitive solution for a faulty computer. What sets this part apart is our essential programming service. Before we ship the module, we flash it with the latest, most stable software updates directly from GM, using your vehicle’s unique Vehicle Identification Number (VIN). This critical step ensures that the module is a true plug-and-play component, perfectly matched to your car’s specific configuration, options, and security systems. You get a component that is ready for installation, saving you the time, cost, and hassle of a trip to the dealership for programming.
Common Symptoms of a Failing Impala Engine Control Module
- âś” Persistent Check Engine Light (CEL) that won’t clear or returns with various codes.
- âś” Unexplained engine stalling, especially when coming to a stop or at idle.
- âś” A noticeable and sudden decrease in fuel economy.
- âś” The vehicle cranks but refuses to start, or starts only intermittently.
- âś” Rough, erratic idling or engine misfires that aren’t related to spark plugs or coils.
- âś” Harsh or incorrect transmission shifting patterns.
- âś” Loss of power or sluggish acceleration.
Installation and Post-Installation Requirements
Once you receive your VIN-programmed ECM, installation is straightforward for a qualified technician or experienced DIYer. After the new module is physically installed, a security relearn procedure will likely be required. This is a standard anti-theft measure on all modern GM vehicles that syncs the new computer to your car’s keys and security system. The most common method is the “10-Minute Relearn Procedure,” which can typically be done without special tools. Failure to perform this step will result in a no-start condition, as the vehicle’s anti-theft system will be active. We recommend consulting a service manual for the exact procedure for your specific model.
Guaranteed Fitment
This module is a direct replacement for the following vehicles. Please ensure your vehicle and options match the list below:
- IMPALA 2017-2019 Electronic Control Module
- CAPRICE 2017 Electronic Control Module; 3.6L
- TRAVERSE 2017 Electronic Control Module; (behind fan shroud)
- XTS 2017-2019 Electronic Control Module; (3.6L), VIN 3 (8th digit, opt LFX)
- ACADIA 2017 Electronic Control Module; VIN J (11th digit, Limited), (behind fan shroud)
- ENCLAVE 2017 Electronic Control Module; (behind fan shroud)
- REGAL 2017 Electronic Control Module; (LH engine compartment)
- VERANO 2017 Electronic Control Module
- EQUINOX 2017 Electronic Control Module; (LH engine compartment)
- TERRAIN 2017 Electronic Control Module; (LH engine compartment)
Frequently Asked Questions
What exactly is an ECM?
The ECM, or Engine Control Module, is your car’s main computer. It controls all aspects of engine operation, including fuel mixture, spark timing, and idle speed, to ensure the engine runs efficiently and cleanly.
Is this part ready to install when I receive it?
Yes, this ECM comes fully programmed to the VIN you provide at checkout. The only additional step required after physical installation is a simple security relearn procedure, which syncs the new module to your vehicle’s anti-theft system.
How do I give you my vehicle’s VIN?
You can add your VIN to the notes section during checkout or simply reply to your order confirmation email with the 17-digit VIN. We cannot program and ship the module without it.
Will this fix my car’s problem for sure?
This part will correct any and all issues caused by a faulty ECM. However, it’s crucial that your vehicle has been properly diagnosed. This module will not fix problems related to other bad sensors or mechanical failures.
What is a security relearn procedure?
It’s a process that allows your vehicle’s security system to recognize the new ECM. For most GM vehicles, it involves turning the key to the ‘ON’ position for 10-12 minutes, then off, and repeating two more times. This allows the components to sync. Without this, the car will not start.
Does this Impala Engine Control Module fit other cars?
Yes, this specific part number is compatible with a range of 2017-2019 GM vehicles, including the Acadia, Traverse, Equinox, and Cadillac XTS, among others. Please check the fitment list on this page to confirm compatibility.