Programmed 2010-2012 CTS ECM Engine Control Module 12651993

Is Your Cadillac CTS Running Rough? Restore Peak Performance Now.

If you’re dealing with a persistent Check Engine Light, unexplained stalling, poor fuel mileage, or a no-start condition in your 2010-2012 Cadillac CTS, the root cause is often a failing Engine Control Module (ECM). As the central computer for your engine, its failure can create a cascade of frustrating and difficult-to-diagnose problems. Stop chasing symptoms and replace the core component with a reliable, pre-programmed solution.

In my 20+ years as a diagnostic technician, I’ve seen countless vehicles sidelined by faulty electronics. A customer’s 2011 CTS 3.0L came into my shop last month with intermittent stalling and a stubborn P0606 (ECM Processor Fault) code that wouldn’t clear. After verifying the main wiring harness and grounds were solid—a critical first step—we confirmed the ECM itself had an internal failure. This is a common issue on these GM platforms, often caused by years of heat cycles and engine vibration degrading the delicate internal circuits.

The Plug-and-Play Solution: A Pre-Programmed 2010-2012 CTS ECM

Forget the hassle and expense of a dealership visit. This ECM is the definitive solution for getting your vehicle back on the road quickly and correctly. We take the guesswork out of the repair by programming the module specifically for your car before it ever leaves our facility.

• ✔ VIN Programmed for Your Vehicle: We flash this module with the latest GM-certified software using your car’s unique Vehicle Identification Number (VIN). This ensures perfect compatibility with your engine, transmission, and options.
• ✔ True Plug-and-Play Installation: Because the programming is done in-house, you can install it yourself. No need for expensive scan tools or a trip to the dealer for initialization.
• ✔ Solves Common Failure Symptoms: Effectively resolves issues like false sensor codes, harsh shifting, communication errors with other modules, and erratic engine performance.
• ✔ Direct-Fit Replacement: Guaranteed to replace a wide range of original part numbers, including 12616889, 12630908, 12637106, 12642665, 12650256, and 12651993.

Simple Installation Guide: Get Your CTS Running in Under an Hour

Installing your new 2010-2012 CTS ECM is a straightforward process. For the 3.0L and 3.6L CTS models, the ECM is located in the right-hand (passenger side) front of the engine compartment.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
2. Locate the ECM: Find the module on the passenger side of the engine bay. It will have several large electrical connectors attached.
3. Disconnect the Connectors: Carefully unlatch and remove all wiring harness connectors from the old ECM. Inspect the pins for any corrosion or damage and clean them with a dedicated 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 onto the bracket and secure the bolts.
6. Reconnect Everything: Firmly plug the wiring harness connectors back into the new module until they click into place. Reconnect the negative battery terminal.
7. Final Step: Your vehicle may require a security relearn procedure, which can typically be done by cycling the key. Start the car and let it idle for a few minutes to allow all systems to sync.

Important Note: After placing your order, please send us your vehicle’s 17-digit VIN. We cannot ship your part until we have programmed it. This step is essential to ensure your car starts and runs correctly upon installation.