Is Your Cadillac DTS Experiencing Frustrating Engine Problems?
If your 2009, 2010, or 2011 Cadillac DTS is stalling, running rough, refusing to start, or has a persistent Check Engine Light, a failing Engine Control Module (ECM) is a very likely culprit. As the central computer for your engine, the ECM’s health is critical for performance, fuel economy, and reliability. When it falters, it can cause a cascade of confusing and concerning issues, leaving you stranded and facing a costly trip to the dealership.
The Direct, Dealer-Free Solution: A VIN-Programmed ECM
This is a direct-fit replacement Engine Control Module for your Cadillac DTS, arriving at your door fully programmed to your vehicle’s specific VIN. We handle the complex part for you. Simply provide us with your VIN during checkout, and our technicians will flash the module with the latest, most stable GM software updates. This ensures seamless communication with your car’s other systems and restores the precise performance your Northstar V8 was designed for.
Expert Pro Tip: Check Your Connectors First!
In my 20+ years in the shop, I’ve seen countless ECMs get replaced when the real issue was simpler. Before you install this new module, take a bright flashlight and carefully inspect the harness connectors that plug into your old ECM. Look for any signs of green or white crusty buildup (corrosion) or bent pins. A poor connection can mimic a failed ECM perfectly. Cleaning the terminals with a dedicated contact cleaner can sometimes solve the problem and is a great preventative measure even when replacing the module.
Common Symptoms of a Failing 2009-2011 DTS ECM:
- โ Persistent Check Engine Light (CEL) with communication-related codes.
- โ Unexplained stalling or engine shutting off while driving.
- โ No-start or hard-start conditions.
- โ Noticeable decrease in fuel efficiency.
- โ Rough idling or poor engine performance.
- โ Issues with automatic transmission shifting.
Plug-and-Play Installation: No Dealer Visit Required
Installing your new ECM is a straightforward process that you can do at home, saving you time and money. While a security relearn procedure may be required after installation (a simple process you can find online), you will not need a dealer’s proprietary scan tool for programming.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the ECM: On the DTS, the ECM is typically located in the engine bay, situated within the lower part of the air cleaner box assembly.
- Disconnect: Carefully unclip and remove the electrical harness connectors from the old module.
- Remove Old Unit: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- Install New Unit: Mount your new, pre-programmed ECM in the same location.
- Reconnect: Securely plug the harness connectors into the new module. You should hear a ‘click’.
- Power Up: Reconnect the negative battery terminal. Perform the security relearn procedure if necessary to sync the module with your keys.
Guaranteed Compatibility
This module is a direct replacement for a wide range of GM vehicles and is interchangeable with several part numbers. Please verify your part number or contact us with your VIN to ensure perfect fitment.
Replaces Part Numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, 12678512
Fits Select Models Including: Cadillac DTS, Lucerne, STS, SRX, CTS, XLR; Chevrolet Corvette, Colorado, Trailblazer; GMC Envoy, Canyon; Hummer H3; and Saab 9-7X. Please refer to the detailed fitment list to confirm your specific application.