Restore Your Cadillac’s Brainpower and Performance
Is your 2009-2011 Cadillac DTS running rough, stalling unexpectedly, or refusing to start? Are you battling a persistent Check Engine Light that just won’t go away? Before you resign yourself to a costly and time-consuming trip to the dealership, consider the heart of the problem: a failing Engine Control Module (ECM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty ECM can cause a host of baffling issues that seem unrelated. This isn’t just a part; it’s the central computer of your vehicle, and when it falters, everything from fuel delivery to spark timing is compromised.
We offer a straightforward, reliable solution. This genuine GM Engine Control Module, part number 12625453, is the definitive fix for your vehicle’s electronic woes. The best part? We handle the most critical step for you. Simply provide your vehicle’s VIN during checkout, and our experts will program the module with the latest GM-certified software specifically for your car. This means when it arrives at your door, it’s ready for installation right out of the box. You get a fully functional, updated 2009-2011 DTS ECM without the dealership’s high programming fees or hassle.
Case Study: A Tricky Diagnosis
I remember a 2010 Cadillac DTS that came into the shop with a very frustrating intermittent stalling problem. The owner had already replaced the fuel pump and crankshaft position sensor with no luck. The car would run fine for days, then suddenly die at a stoplight. No specific codes were stored consistently, just a random collection of communication errors. After checking all the wiring, we focused on the ECM. On the surface, it looked fine. But by monitoring live data, we saw the processor would occasionally drop communication for a split second—just long enough to shut the engine down. Swapping in a pre-programmed 2009-2011 DTS ECM solved the problem instantly. It’s a classic example of how an internal module fault can mimic other component failures, costing owners time and money on unnecessary repairs.
Is Your Cadillac Exhibiting These Symptoms?
A failing ECM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Check Engine Light is on with codes like P0601, P0606, or other internal processor faults.
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained stalling or rough idling.
- ✔ Noticeable decrease in fuel economy.
- ✔ Hesitation or stumbling during acceleration.
- ✔ Intermittent electrical issues or communication errors with other modules.
A Straightforward Guide to Installation
One of the biggest advantages of our pre-programmed module is the ease of installation. You can do this yourself in the driveway with basic hand tools. Here’s a general guide:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the ECM: On the 2009-2011 Cadillac DTS, the ECM is typically located in the engine bay. Consult a vehicle-specific repair manual for the exact location if you’re unsure.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be released. Once disconnected, unbolt the old ECM from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed ECM into place. Reconnect the electrical connectors, ensuring they click securely into place.
- Final Step: Reconnect the negative battery terminal. The vehicle may require a security relearn procedure, which can often be completed by cycling the key. Start the engine and enjoy restored performance!
Verified Vehicle Compatibility
This ECM is a direct-fit replacement for a wide array of General Motors vehicles. While this listing is focused on the 2009-2011 DTS ECM, it is also compatible with the following models. Please verify your part number (12625453) or one of the interchangeable service numbers below.
Interchangeable Part Numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12622175, 12630464, 12678512
- CADILLAC CTS (2009) 6.2L
- CADILLAC DTS (2009-2011)
- CADILLAC SRX (2009) 4.6L
- CADILLAC STS (2009) 4.4L, 4.6L
- CADILLAC STS (2010) 4.6L
- CADILLAC XLR (2009)
- CHEVROLET COLORADO (2009-2012) 2.9L, 3.7L
- CHEVROLET CORVETTE (2009) ZR1
- CHEVROLET TRAILBLAZER (2009) 6.0L
- GMC CANYON (2009-2012) 2.9L, 3.7L
- GMC ENVOY (2009) 5.3L
- HUMMER H3 (2009-2010) 3.7L
- BUICK LUCERNE (2009-2011) 4.6L
- SAAB 9-7X (2009)
Frequently Asked Questions
Does this module really come ready to install?
Yes. We program the module to the specific Vehicle Identification Number (VIN) you provide at checkout. This ensures it communicates correctly with your car’s other systems, requiring no additional programming.
How do I provide my VIN?
You can enter your 17-digit VIN in the notes section during the checkout process. Please double-check it for accuracy to ensure correct programming.
Will this fix my specific problem?
This module is the direct solution for issues caused by an internal ECM failure, such as specific processor fault codes (P0601-P0606) and many no-start or intermittent stalling conditions. While it fixes many problems, always ensure your vehicle has been properly diagnosed.
Is any other setup required after installation?
In some cases, a Case Relearn or security relearn procedure may be necessary. This can often be performed with a capable scan tool or by following a specific key-cycling procedure. This is a standard step for this type of repair on GM vehicles.
What if I have the wrong part number?
This module (12625453) is interchangeable with several other GM service numbers listed above. As long as your original module’s part number is on our list, this unit will be a compatible replacement.