Restore Peak Performance to Your Cadillac DTS
Is your 2009, 2010, or 2011 Cadillac DTS suffering from frustrating issues like a persistent check engine light, rough idling, stalling, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s engine performance, fuel economy, and emissions. A faulty ECM can disrupt the sophisticated harmony of your engine’s systems, leading to poor drivability and unreliable operation. This replacement Engine Control Module, part number 1263605, is the definitive solution to restore your vehicle’s factory performance and reliability.
The Plug-and-Play Solution: Programmed Specifically for Your Vehicle
One of the biggest hurdles in replacing a modern vehicle computer is the need for expensive programming at a dealership. We eliminate that step entirely. When you purchase this module, we flash it with the latest official GM software updates using the 17-digit Vehicle Identification Number (VIN) you provide. This ensures that the module is perfectly matched to your vehicle’s specific configuration, options, and security systems. The result is a direct-fit, plug-and-play component that gets you back on the road faster, without the extra cost and hassle of a trip to the dealer. This is the most efficient way to install your new 2009-2011 DTS Engine Module.
From the Diagnostic Bay
We had a 2010 Cadillac DTS come into the shop with a complaint of intermittent stalling at stoplights and a check engine light that would come and go. The owner had already replaced the spark plugs and an O2 sensor with no luck. Our diagnostic scan tool showed a ‘U0100 – Lost Communication with ECM/PCM’ code, but it was intermittent. After checking all the wiring and connectors for integrity, we suspected the ECM itself was failing internally. We installed one of our VIN-programmed modules, performed a quick security relearn, and the car ran perfectly. The intermittent stalling vanished, and the communication codes never returned. It’s a great example of how a failing computer can create phantom symptoms that seem unrelated.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) on your dashboard.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Rough or erratic idling.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Hesitation or stumbling during acceleration.
- ✔ Transmission shifting issues or harsh shifts.
- ✔ Inability to communicate with the ECM using a diagnostic scan tool.
Guaranteed Compatibility and Wide-Ranging Fitment
This high-quality 2009-2011 DTS Engine Module is a direct replacement for a wide range of GM vehicles, ensuring broad compatibility. It is interchangeable with several service numbers, making it a versatile solution for many models from Cadillac, Chevrolet, GMC, Hummer, and more. To guarantee a perfect match, please verify that your vehicle is on the fitment list below and provide your VIN upon checkout.
Interchangeable Service Numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, 12678512
Installation is straightforward for an experienced DIYer or any professional technician. While the module is programmed to your VIN, some vehicles may require a simple, on-vehicle procedure like a Security Relearn or Crankshaft Position Variation Learn (Case Learn) to sync the new module with the vehicle’s other systems. These procedures can often be completed without specialized tools.
Frequently Asked Questions
Do I need to program this module when I receive it?
No. This module comes fully programmed to your vehicle’s specific VIN with the latest GM software. It is ready for installation right out of the box, saving you a trip to the dealership.
What information do you need from me?
To ensure perfect programming, we require your vehicle’s 17-digit Vehicle Identification Number (VIN). You can typically find this on your driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Where is the ECM located on a 2009-2011 Cadillac DTS?
On the Cadillac DTS for these model years, the Engine Control Module is typically located in the engine bay, often inside or near the air cleaner box assembly on the driver’s side.
Will this part fix my vehicle’s problem for sure?
This ECM will correct any issues directly caused by a faulty engine computer. However, it is crucial to have your vehicle properly diagnosed to confirm the ECM is the source of the problem, as other failing sensors or wiring issues can cause similar symptoms.
Is any additional setup required after I install it?
In some cases, a simple ‘Security Relearn’ procedure may be necessary to sync the new module with your car’s anti-theft system. This can often be done without any special tools and instructions are widely available online or in service manuals. A ‘Crankshaft Position Variation Learn’ may also be needed to ensure optimal performance.