Is Your Cadillac CTS Stalling, Hesitating, or Showing a Check Engine Light?
If you’re experiencing frustrating engine problems with your 2010-2012 Cadillac CTS, a faulty Engine Control Module (ECM) is often the culprit. As a technician with over two decades of experience, I’ve seen firsthand how a failing ECM can cause a cascade of issues, from random stalling and poor fuel economy to a car that simply won’t start. Your vehicle’s ECM is its brain, controlling critical functions like fuel mixture, ignition timing, and transmission shifting. When it fails, your car’s performance and reliability are compromised.
Don’t Let a Bad ECM Keep You Sidelined
This replacement Engine Control Module is the definitive solution to get your vehicle running correctly again. The most significant benefit we offer is our professional programming service. Before we ship your part, we flash it with the latest official GM software, tailored specifically to your car using the VIN you provide. This means you receive a part that is truly plug-and-play, saving you from a costly and time-consuming trip to the dealership for programming.
Common Symptoms of a Failing GM ECM:
- โ Persistent Check Engine Light (CEL)
- โ Engine stalling or cutting out unexpectedly
- โ Rough idling or hesitation during acceleration
- โ Noticeable decrease in fuel efficiency
- โ No-start condition where the engine cranks but won’t fire
- โ Communication errors with diagnostic scan tools
- โ Unexplained transmission shifting problems
A Straightforward Solution for Your 2010-2012 CTS Engine Control Module
Replacing the ECM on your Cadillac is a manageable job for a confident DIYer. This module is designed as a direct-fit replacement, ensuring a perfect physical match. By ordering a pre-programmed unit, you eliminate the most complex part of the job, allowing you to restore your car’s performance right in your own driveway.
Easy Installation Guide
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning work.
- Locate the ECM: On the 2010-2012 Cadillac CTS, the Engine Control Module is typically found in the engine bay, on the right-hand (passenger) side.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and pull them straight out from the module. Do not force them.
- Remove the Old Module: Unbolt the mounting hardware holding the old ECM in place and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed ECM in the same location, securing it with the original hardware.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new module until they click into place. Reconnect the negative battery terminal.
- Final Step: Your vehicle may require a security relearn procedure, which can often be completed by turning the key to the ‘ON’ position for 10-15 minutes. Your vehicle is now ready to start.
Guaranteed Fitment and Compatibility
This module, part number 12650256, is a direct replacement for a wide range of GM vehicles. It is also interchangeable with part numbers 12616889, 12630908, 12637106, 12642665, and 12651993. By providing your VIN at checkout, you guarantee that you receive a module with the correct software for your specific make, model, and engine configuration, restoring your vehicle to its factory-specified operation.