Is Your Cadillac CTS Running Rough? The Problem Might Be Your ECM.
The Engine Control Module (ECM), often called the engine computer, is the brain of your vehicle’s powertrain. It controls everything from fuel injection and ignition timing to emissions systems and transmission shifting. When it starts to fail, it can cause a wide range of confusing and frustrating problems that can be difficult to diagnose. If your Cadillac CTS, Camaro, Corvette, or other compatible GM vehicle is experiencing erratic behavior, a faulty ECM could be the culprit. This replacement ECM, part number 12633264, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency.
Common Symptoms of a Failing Engine Control Module
A failing ECM doesn’t always result in a simple “no-start” condition. The symptoms can be subtle at first and worsen over time. Look out for these common warning signs:
- ✔ Check Engine Light: An illuminated or flashing Check Engine Light is the most obvious sign. You may see codes related to sensor circuits (P0100-P0600 series) or internal module failure (P0601-P0606).
- ✔ Engine Stalling or Misfiring: The engine may stall unexpectedly, misfire, or run rough, especially as it warms up.
- ✔ Poor Performance & Fuel Economy: You may notice a significant decrease in acceleration, power, and miles per gallon (MPG) as the ECM struggles to manage the engine correctly.
- ✔ No-Start or Hard Starting: The vehicle may crank but fail to start, or it may take an unusually long time to fire up.
- ✔ Transmission Shifting Issues: On automatic vehicles, the ECM communicates with the Transmission Control Module (TCM). A faulty ECM can lead to harsh shifting, delayed engagement, or being stuck in one gear (limp mode).
- ✔ Communication Errors: Your diagnostic scan tool may be unable to communicate with the ECM, a clear sign of an internal fault.
The Smart Solution: A VIN-Programmed CTS Engine Control Module
Don’t let a faulty computer keep your high-performance vehicle sidelined. This isn’t just a generic part off a shelf; it’s a complete, ready-to-install solution. We take the guesswork and hassle out of the repair process. When you order, you provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians then use official GM equipment to flash the module with the latest, most stable software specific to your car’s exact build. This ensures perfect compatibility with your engine, transmission, and all factory options.
This process eliminates the need for an expensive trip to the dealership for programming. For many applications, installation is a direct swap. This module is a direct replacement for service numbers 12633264 and 12678513, guaranteeing a perfect fit and function.
Guaranteed Fitment For Your Vehicle
This Engine Control Module is compatible with a wide range of General Motors vehicles. Please verify your vehicle and options below to ensure proper fitment:
- Cadillac CTS: 2010-2013 (6.2L), 2014 (Cpe, Sdn, SW, 6.2L), 2015 (Cpe)
- Chevrolet Camaro: 2012 (3.6L or 6.2L, ID 12633264), 2013-2015 (6.2L, VIN P)
- Chevrolet Corvette: 2010-2013 (6.2L, VIN R or VIN T, opt LS9)
- Chevrolet Colorado / GMC Canyon: 2010-2012 (5.3L)
- Hummer H3: 2010 (5.3L)
- Chevrolet Malibu: 2010-2012 (3.6L)
Frequently Asked Questions
Do I need to get this ECM programmed by a dealer?
No. This ECM comes fully programmed to your vehicle’s specific VIN before we ship it. This service is included in the purchase price, saving you time and the high cost of dealership programming.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your car, like a serial number. It contains critical information about your vehicle’s make, model, engine, and factory-installed options. We use the VIN to load the exact correct software onto your new ECM for seamless integration.
Is any other procedure required after I install the module?
In many cases, it’s a simple plug-and-play installation. However, some GM vehicles may require a Security Relearn Procedure (often a simple 10-30 minute key cycle process) and/or a Crankshaft Variation Relearn (CASE learn), which can be done with a capable scan tool. Instructions for the security relearn are readily available online.
Will this part fix my check engine light?
If the check engine light and other symptoms are being caused by a faulty ECM, then yes, this part will resolve those issues. However, it is crucial to properly diagnose your vehicle first, as other failing components (like sensors or wiring) can cause similar symptoms. This module will fix problems originating from the computer itself.
Where is the ECM located on a 2010-2015 Cadillac CTS?
On most 2010-2015 Cadillac CTS models, the ECM is located in the engine compartment, on the right-hand (passenger) side, often near the front. Always disconnect the battery before attempting to remove or install the module.