Restore Peak Performance to Your Cadillac DTS
Is your 2009-2011 Cadillac DTS experiencing frustrating issues like stalling, erratic idling, a persistent Check Engine Light, or a complete no-start condition? As a technician with over two decades of diagnostic experience, I’ve seen these symptoms countless times. The culprit is often a failing Engine Control Module (ECM)—the central computer of your vehicle. A faulty ECM can disrupt everything from fuel delivery and ignition timing to transmission shifting, making your luxury vehicle feel unreliable. This isn’t just an inconvenience; it’s a critical component failure that needs a solid, dependable solution.
This isn’t just a replacement part; it’s a complete, ready-to-install fix. We take the hassle and high cost out of the equation by pre-programming this 2009-2011 DTS Engine Control Module specifically to your vehicle. Simply provide your Vehicle Identification Number (VIN) during checkout, and our experts will flash the module with the latest, most stable software updates directly from GM. This means no expensive trips to the dealership for programming and no special scan tools required for installation. It arrives at your door ready to restore the precise, smooth operation you expect from your Cadillac.
Common Signs Your DTS ECM Needs Attention
If you’re noticing any of the following issues, a failing engine computer is a likely cause. I’ve diagnosed hundreds of GM vehicles where these symptoms pointed directly to the ECM, especially when accompanied by internal processor fault codes.
- ✔ Unexplained Check Engine Light (CEL) illumination
- ✔ Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0606 (Internal Control Module Processor Error)
- ✔ Vehicle intermittently stalls or refuses to start
- ✔ Noticeable decrease in fuel economy
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Engine misfires or rough running conditions
- ✔ Communication errors with diagnostic scan tools
From the Diagnostic Bay: The Ghost in the Cadillac
I remember a 2010 DTS that came into my shop with a truly baffling problem. The owner said it would randomly refuse to start, but only after it was driven and sat for about an hour. No codes, no warning lights during the event. We tested the battery, starter, and fuel pump—all perfect. On the third day, I had it running in the bay and happened to have my hand near the ECM. I felt an unusual amount of heat radiating from it. After letting it cool and trying to start it, it fired right up. A bit of thermal testing confirmed it: the ECM’s internal processor was failing when it got hot, creating an intermittent no-start that was impossible to predict. Replacing it with a properly programmed unit like this one solved the issue for good. It’s often these ‘ghost’ problems that trace back to a failing ECM.
A Straightforward Guide to Installation
Replacing the ECM on your DTS is a manageable job for a confident DIYer. With our pre-programmed module, you skip the hardest part. Always consult a vehicle-specific repair manual, but here are the general steps:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent any accidental reconnection.
- Locate the ECM: On the Cadillac DTS, the ECM is typically located in the engine compartment. Identify the module and its mounting brackets.
- Disconnect Wiring: Carefully unlatch and remove the electrical connectors from the old ECM. Inspect the connectors for any corrosion or damage and clean them if necessary.
- 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. Secure it with the original hardware.
- Reconnect Everything: Firmly plug the electrical connectors into the new ECM until they click into place. Reconnect the negative battery terminal.
- Final Steps: The vehicle may need to complete a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. This allows other modules to recognize the new ECM. Start the engine and verify that the Check Engine Light is off and the vehicle runs smoothly.
Verified Vehicle Compatibility List
This ECM, part number 12622175, is a direct replacement for a wide range of GM vehicles and is interchangeable with service numbers 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12630464, and 12678512. Please verify your vehicle is on the list below for guaranteed compatibility.
- Cadillac DTS: 2009-2011
- Cadillac CTS: 2009 (6.2L)
- Cadillac SRX: 2009 (4.6L)
- Cadillac STS: 2009 (4.4L, 4.6L), 2010 (4.6L)
- Cadillac XLR: 2009 (ID 12636659 or 12625453)
- Buick Lucerne: 2009-2011 (4.6L)
- Chevrolet Colorado: 2009, 2010-2012 (2.9L, 3.7L)
- Chevrolet Corvette: 2009 (ZR1)
- Chevrolet Trailblazer: 2009 (6.0L)
- GMC Canyon: 2009, 2010-2012 (2.9L, 3.7L)
- GMC Envoy: 2009 (5.3L)
- Hummer H3: 2009, 2010 (3.7L)
- Saab 9-7X: 2009
Your Reliable Fix is Here
Don’t let a faulty computer keep your Cadillac off the road. Order this fully programmed 2009-2011 DTS Engine Control Module and get a reliable, cost-effective solution delivered to your door. Provide your VIN, and let us handle the complex programming so you can focus on the simple installation.
Frequently Asked Questions
Do I need to do any programming myself?
No. This module comes fully programmed to your vehicle’s VIN with the latest GM software. It is ready for installation right out of the box. A security relearn procedure may be required, which does not need special tools.
Where do I provide my VIN?
Please enter your 17-digit Vehicle Identification Number (VIN) in the designated box on the checkout page. We cannot process your order without it, as the programming is vehicle-specific.
Is this compatible with other part numbers?
Yes, this ECM is a direct replacement for several service numbers, including 12636659, 12639300, 12628993, and others listed in the compatibility section. It is the correct hardware for a wide range of GM applications.
What if my original problem doesn’t go away?
While the ECM is a common point of failure for these symptoms, proper vehicle diagnosis is key. We guarantee the module is programmed correctly and functional. If issues persist, it may indicate another problem (e.g., wiring, sensors) that was masked by the faulty ECM.
Do I need to return my old ECM?
This purchase does not require a core return. You can keep your old module or dispose of it responsibly.