Is Your Cadillac XTS Running Rough or Not Starting?
If your 2013-2016 Cadillac XTS is suffering from a persistent check engine light, erratic engine behavior, poor fuel economy, or a frustrating no-start condition, a failing Engine Control Module (ECM) is a very likely culprit. The ECM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, it can cause a wide range of confusing and debilitating symptoms that can leave you stranded.
The Direct Solution for Your Vehicle’s Brain
This is a genuine, used OEM Engine Control Module, compatible with part numbers 12653998, 12633555, 12655007, and 12644446. Sourced from a salvaged vehicle and rigorously tested for full functionality, this ECM is the reliable and cost-effective solution to restore your Cadillac’s performance and drivability. We take the guesswork and hassle out of the repair process by programming the module specifically for your vehicle before it ever leaves our facility.
We once had a 2014 SRX come in with classic signs of a bad ECM—stalling intermittently, random warning lights, and no communication with our scan tool. The customer had already bought a module online, but the issue persisted. After hours of tracing wires, we found the problem: a corroded main ground wire on the engine block. The original ECM was fine. This is a crucial reminder: always check your battery connections, main power, and ground wires before condemning an expensive computer. A simple cleaning with a wire brush can save you hundreds of dollars and a lot of frustration.
Common Symptoms of a Failing GM ECM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Complete no-start or hard-starting conditions.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Rough or erratic idling.
- ✔ Automatic transmission shifting problems or harsh shifts.
- ✔ Communication errors with diagnostic scan tools.
Why Choose Our Programmed 2013-2016 XTS ECM?
Getting a replacement ECM from a dealership can be an expensive and time-consuming ordeal. They often require you to have the vehicle towed in for installation and programming, leading to significant labor charges. Our solution simplifies the entire process. By providing us with your vehicle’s Vehicle Identification Number (VIN) during checkout, you receive a module that is truly plug-and-play. We flash it with the latest, most stable software updates directly from GM, ensuring optimal performance and compatibility. This means no additional programming or dealer visits are required for most installations. Simply install the module, perform the vehicle security relearn procedure (if necessary), and get back on the road.
This module is not only a fit for the 2013-2016 Cadillac XTS but also for a wide range of other GM vehicles, including the Camaro, Malibu, Regal, Equinox, Enclave, Impala, SRX, Traverse, Acadia, and more. Please verify the part number and consult the detailed fitment list to ensure compatibility with your specific make, model, and engine option.
Frequently Asked Questions
Do I need to program this ECM?
No. We handle all the programming for you before we ship the part. You just need to provide your vehicle’s VIN at the time of purchase. This makes the installation process much simpler and saves you a trip to the dealership.
Why do you need my VIN?
Your VIN allows us to access the exact GM factory calibration files for your specific vehicle. We use it to load the correct software and updates, ensuring the ECM communicates perfectly with your engine, transmission, and other onboard systems.
Is this a new part?
No, this is a fully functional, used OEM part that was carefully removed from a salvaged vehicle. Each unit is inspected and tested to ensure it meets factory standards of performance and reliability.
What is involved in the installation?
Installation involves disconnecting the battery, locating and removing your old ECM, and installing this replacement. In many cases, a simple vehicle security relearn procedure is required, which can typically be done without special tools. We always recommend installation by a qualified mechanic to ensure everything is done correctly.
Will this part fit other GM vehicles?
Yes, this ECM is compatible with a wide array of GM cars and SUVs from the same era. Please carefully review the detailed fitment list in the description to confirm it matches your vehicle’s make, model, year, and engine.