2012-2016 Cruze Engine Module 12668991 Programmed ECM PCM

Is Your GM Vehicle Running Rough? The Solution is Here.

If you’re dealing with a persistent check engine light, erratic engine behavior, stalling, or a no-start condition on your Chevrolet Cruze, Sonic, or other compatible GM vehicle, a failing Engine Control Module (ECM) is a very likely culprit. As the brain of your engine, when the ECM falters, it can create a cascade of frustrating and hard-to-diagnose problems. This isn’t just an inconvenience; it affects your vehicle’s reliability, fuel economy, and safety. This replacement ECM, part number 12668991, is the direct-fit, hassle-free solution to restore your vehicle’s performance and peace of mind.

The Critical Advantage: Programmed to Your VIN

Don’t get stuck with a generic module that requires an expensive trip to the dealership for programming. We handle the hard part for you. Before we ship your order, our experts will flash this ECM with the latest GM-certified software specific to your vehicle’s Vehicle Identification Number (VIN). This ensures that all factory parameters for the engine, transmission, and emissions systems are perfectly matched to your car, truck, or van. It’s a true plug-and-play solution designed for the DIY mechanic or professional installer.

Solving Your Vehicle’s Headaches

A failing ECM can manifest in many ways. This replacement module is the definitive fix for common symptoms such as:

• ✔ Persistent Check Engine Light (CEL) with various trouble codes
• ✔ Engine stalling, stumbling, or hesitating during acceleration
• ✔ Rough or unstable idle
• ✔ Complete no-start or intermittent starting problems
• ✔ Poor fuel economy and loss of power
• ✔ Communication errors with diagnostic scan tools

Easy Installation for Your 2012-2016 Cruze Engine Module

Installing your new ECM is a straightforward process that you can do in your own garage. While a security relearn procedure may be required (easily found online for your specific model), the physical swap is simple. Follow these steps for a successful installation:

1. Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all systems to discharge.
2. Locate the ECM: On most compatible vehicles like the Cruze, Sonic, and Trax, the ECM is located in the engine bay, often near the battery or firewall. For vans and trucks, it’s typically on the LH side of the engine compartment.
3. Disconnect Connectors: Carefully unclip the wiring harness connectors from the old module. Inspect the pins on the harness side for any corrosion or damage and clean them with electrical contact cleaner if necessary.
4. Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
5. Install the New Module: Mount your new, pre-programmed ECM in place and securely tighten the bolts.
6. Reconnect Everything: Plug the wiring harnesses back into the new module until they click firmly into place. Reconnect the negative battery terminal.
7. Perform Security Relearn: If your vehicle doesn’t start immediately, perform the security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times to sync the new ECM with your vehicle’s anti-theft system.

Guaranteed Compatibility

This module is a direct replacement for a wide range of GM vehicles and interchanges with several part numbers, ensuring you get the right component. It is guaranteed to fit if your original module carries any of the following part numbers: 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, or 12692200. Please verify your part number or consult the detailed fitment list to confirm compatibility with your specific make, model, and year.