Is Your Cadillac DTS Experiencing Engine Problems?
A faulty Engine Control Module (ECM), often called the engine computer, is the central command center of your vehicle. When it begins to fail, it can cause a cascade of frustrating and difficult-to-diagnose issues, from a persistent check engine light to a car that won’t start at all. If you’re experiencing erratic engine behavior, poor fuel mileage, or stalling in your Cadillac, the problem may lie with a failing computer. This replacement 2009-2011 DTS Engine Control Module is the definitive solution to restore your vehicle’s performance, reliability, and drivability.
Unlike generic modules that require expensive and time-consuming trips to the dealership for programming, this unit arrives at your door ready for installation. We use your vehicle’s Vehicle Identification Number (VIN) to flash the module with the latest, most stable software updates directly from GM. This ensures perfect compatibility and function, just as the factory intended. It’s a true plug-and-play solution designed for both professional technicians and savvy DIY-ers.
From the Diagnostic Bay
We recently had a 2010 Cadillac DTS towed to our shop. The owner was frustrated after replacing multiple sensors and ignition coils trying to solve a random stalling and no-start issue. The check engine light was on with a P0601 ‘Internal Control Module Memory Check Sum Error’ code. This code points directly to a faulty ECM. Instead of a costly new unit from the dealer, the owner opted for one of our pre-programmed modules. After a straightforward installation and a simple security relearn procedure, the DTS started on the first try and ran flawlessly. The key was getting a module correctly programmed to the car’s VIN before installation, which saved the customer hundreds of dollars and significant downtime.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Engine stalling, stumbling, or misfiring unexpectedly
- ✔ Complete no-start or intermittent hard-starting conditions
- ✔ A noticeable and sudden decrease in fuel economy
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Communication errors when using a diagnostic scan tool
- ✔ Failure to pass state emissions inspections
Why Choose Our 2009-2011 DTS Engine Control Module?
Choosing the right replacement part is critical for a lasting repair. This module is not just a part; it’s a complete service. We handle the complex programming so you don’t have to. By providing your VIN at checkout, you receive a unit that is a direct-fit replacement, loaded with the correct software for your specific vehicle configuration. This eliminates compatibility guesswork and ensures all related systems, from the engine and transmission to the anti-theft system, communicate correctly. This module is a dependable replacement for a wide range of GM vehicles and is interchangeable with the following service numbers, guaranteeing a perfect match:
Interchangeable Part Numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, 12678512
Broad Vehicle Compatibility
While this is the primary computer for the 2009-2011 Cadillac DTS, it is also the correct module for a wide array of other GM vehicles. Please verify your part number and specific model options below:
- Cadillac CTS (2009, 6.2L)
- Cadillac SRX (2009, 4.6L)
- Cadillac STS (2009-2010, 4.4L & 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)
- Buick Lucerne (2009-2011, 4.6L)
- Saab 9-7X (2009)
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming before the item ships. We use your VIN to load the correct GM-certified software for your specific vehicle. The module arrives ready to be installed.
What is a “security relearn” and is it difficult?
A security relearn, or anti-theft relearn, syncs the new ECM to your vehicle’s existing keys and security system. For most GM vehicles of this era, the process is simple and requires no special tools. It typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating this sequence three times. We include instructions to guide you through this easy procedure.
Where is the ECM located on my 2009-2011 Cadillac DTS?
On the 2009-2011 Cadillac DTS, the Engine Control Module is typically located inside the engine bay, attached to or near the air cleaner box assembly. Always disconnect the battery before attempting to remove or install the module.
How do I provide my VIN?
Please enter your 17-digit Vehicle Identification Number (VIN) in the designated box on the checkout page. This is crucial for us to program the module correctly for your vehicle. An incorrect or missing VIN will delay your order.
Will this fix my car’s problem for sure?
While this ECM is the solution for a wide range of engine management issues, proper vehicle diagnostics are essential. We recommend confirming the ECM is the point of failure with a professional mechanic or by verifying common ECM-related diagnostic trouble codes (DTCs). This part will resolve issues caused by a faulty module.