Is Your Cadillac DTS Plagued with Engine Problems?
If you’re dealing with a persistent check engine light, rough idling, stalling, or a no-start condition in your 2009-2011 Cadillac DTS, a failing Engine Control Module (ECM) is often the culprit. As the brain of your vehicle’s engine, a faulty ECM can create a cascade of frustrating and seemingly unrelated issues. I’ve seen it hundreds of times in my 20+ years in the shop: a beautiful car like a DTS is sidelined by an electronic gremlin that owners and even other shops struggle to pinpoint.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a genuine GM Engine Control Module and flash it with the latest, most stable software updates directly from General Motors. By providing your vehicle’s VIN at checkout, you receive a module that is precisely calibrated for your DTS, ensuring seamless communication with all other onboard systems. This eliminates the need for an expensive trip to the dealership for programming.
The Direct Solution for Common DTS Engine Faults
A failing ECM can manifest in many ways. This module is the definitive fix for symptoms such as:
- โ Persistent and unexplained Check Engine Light (CEL)
- โ Engine stalling or cutting out while driving
- โ Rough, erratic, or surging idle
- โ Noticeable decrease in fuel economy
- โ Hesitation or stumbling during acceleration
- โ Complete no-start condition where the engine cranks but won’t fire
- โ Incorrect or erratic automatic transmission shifting
Expert Pro Tip: Check This BEFORE You Install
Before you condemn your old ECM or install this new one, take 5 minutes to inspect the main engine-to-chassis ground strap. Over the years, I’ve seen dozens of vehicles where a corroded or loose ground strap caused voltage fluctuations that mimic a bad ECM. A poor ground can even damage a brand-new module upon installation. Ensure the connection points are clean, bright, and tight. This simple check can save you a world of headaches.
Plug-and-Play Installation: No Dealer Visit Required
We’ve made this process as straightforward as possible. Because we handle all the programming before the part ever leaves our facility, you can perform the installation yourself or have your local trusted mechanic do it without needing specialized GM diagnostic tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the ECM: On the 2009-2011 Cadillac DTS, the ECM is typically located in the engine compartment.
- Disconnect Connectors: Carefully unplug the wiring harness connectors from the old module. Inspect them for any signs of corrosion or damage.
- Remove the Old Module: Unbolt the original ECM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed ECM and securely reconnect the wiring harnesses. You should hear a confident ‘click’.
- Reconnect Battery: Re-attach the negative battery terminal. The vehicle is now ready to start.
Guaranteed Compatibility with Your Vehicle
This module is a direct replacement for a wide range of GM vehicles and is interchangeable with several service part numbers. Your purchase is guaranteed to be the correct, programmed part for your vehicle when you provide your VIN.
Replaces Part Numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, 12678512
Extensive Vehicle Fitment:
While this listing is focused on the 2009-2011 DTS ECM, this part also fits the following models. We will program it specifically for the vehicle VIN you provide:
- 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
- CHEVROLET CORVETTE 2009 (ZR1)
- CHEVROLET TRAILBLAZER 2009 (6.0L)
- GMC CANYON 2009-2012
- GMC ENVOY 2009 (5.3L)
- HUMMER H3 2009-2010
- BUICK LUCERNE 2009-2011 (4.6L)
- SAAB 9-7X 2009