Is Your Cadillac CTS Running Rough or Stalling?
A faulty Engine Control Module (ECM) is often the hidden culprit behind a host of frustrating and difficult-to-diagnose issues in your 2009 Cadillac CTS. As the central computer, or ‘brain,’ of your vehicle’s engine management system, its proper function is critical for everything from fuel economy and emissions to engine performance and transmission shifting. When it begins to fail, you might experience intermittent problems that leave you stranded or facing an expensive bill at the repair shop. This replacement Engine Control Module, part number 12622175, is the definitive solution to restore your vehicle’s reliability and performance.
The Simple, Dealer-Free Solution
Forget the hassle and high cost of a dealership visit. We provide a streamlined process that gets you back on the road quickly. This module is not just a replacement part; it’s a complete, ready-to-install solution. When you place your order, simply provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our expert technicians will then program the module with the very latest, most stable software updates directly from GM. This ensures that any factory-level bugs are ironed out and that the computer is perfectly matched to your vehicle’s specific configuration, including its engine, transmission, and emissions equipment. It arrives at your door ready for a straightforward installation.
From the Diagnostic Bay
We once had a 2009 CTS 6.2L come in that was a textbook ‘parts cannon’ case. The owner had replaced two oxygen sensors, the mass airflow sensor, and even the throttle body chasing an intermittent stalling issue and a P0171 (System Too Lean) code. The car would run fine for days, then suddenly stumble and die at a stoplight. After checking the fuel pressure and looking for vacuum leaks, we hooked up our diagnostic scanner and monitored the live data. We noticed the short-term fuel trims were erratically jumping, something the sensors alone couldn’t explain. We suspected the ECM. After installing one of our pre-programmed modules, the fuel trims stabilized immediately, and the car ran perfectly. The original ECM had an internal fault causing it to misinterpret sensor data, a problem that no amount of new sensors could fix.
Symptoms of a Failing 2009 CTS Engine Module
A failing ECM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, your engine module may be the root cause:
- ✔ Check Engine Light: The check engine light is illuminated, often with communication-related codes (U-codes) or multiple, seemingly unrelated sensor codes.
- ✔ Engine Stalling or Misfiring: The engine may stall unexpectedly, misfire, or run rough, especially after it has warmed up.
- ✔ No-Start Condition: The engine cranks but refuses to start, even with a good battery and fuel supply.
- ✔ Poor Fuel Economy: A sudden and unexplained drop in your vehicle’s gas mileage can be a sign the ECM is not managing the fuel mixture correctly.
- ✔ Harsh or Incorrect Shifting: The ECM communicates with the transmission controller. A fault can lead to erratic shifting, getting stuck in a gear, or delayed engagement.
- ✔ Loss of Power: The vehicle feels sluggish and lacks the acceleration it once had.
- ✔ Intermittent Issues: Problems that come and go with changes in temperature or driving time are classic signs of an electronic module failure.
Guaranteed Compatibility and Performance
This module is a direct replacement for a wide range of GM vehicles and is interchangeable with several service numbers. We guarantee compatibility when you provide your VIN. The programming process ensures that it functions exactly as the original unit, restoring the precise performance and efficiency your vehicle was designed to deliver.
This unit is a direct replacement for the following service numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, 12678512.
Extensive Vehicle Fitment
While this is a perfect solution for the 2009 CTS Engine Module, it also fits a wide variety of other GM models. Please verify your part number or contact us with your VIN to confirm fitment for the following vehicles:
- CADILLAC CTS 2009 (6.2L)
- CADILLAC DTS 2009-2011
- 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
What information do I need to provide for programming?
We require your vehicle’s 17-digit Vehicle Identification Number (VIN) to program the module. You can typically find this on your driver’s side dashboard (visible through the windshield), on your door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this part difficult to install?
The physical installation is generally straightforward, involving disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. After installing the new one, you may need to perform a security relearn procedure (also known as a VATS relearn), which can typically be done without special tools and takes about 30 minutes. Instructions are widely available online.
Will I need to take my car to a dealer after installation?
No. Because we program the module to your VIN before shipping, you will not need to pay for additional programming at a dealership or repair shop, saving you significant time and money.
How do I know this is the correct part for my vehicle?
You can match one of the interchangeable service numbers listed in the description to the number on your current module. The most certain method is to provide us with your VIN at checkout, and we will verify 100% compatibility before programming and shipping.
What does being programmed with the ‘newest updates’ mean?
Manufacturers often release software updates for their vehicle computers to resolve common issues, improve transmission shifting, or enhance engine efficiency. We ensure your module is loaded with the latest and most stable software version available from GM for your specific vehicle.