Is Your GM Vehicle Running Poorly? It Could Be The ECM.
If you’re experiencing frustrating issues like a persistent check engine light, stalling, rough idling, or a sudden drop in fuel efficiency in your Chevrolet, Pontiac, or Trax, the root cause is often a failing Engine Control Module (ECM). The ECM is the brain of your vehicle’s engine, managing everything from fuel injection and ignition timing to emissions control. When it starts to fail, it can create a cascade of problems that are often misdiagnosed, leading to costly and unnecessary repairs of other components.
This replacement ECM, part number 12636386, is the definitive solution for restoring your vehicle’s performance and reliability. We take the guesswork and hassle out of the repair process. Before we ship the part, our technicians will program it with the latest official GM software, specifically matched to your vehicle using the VIN you provide. This ensures a seamless, direct-fit installation without the need for an expensive trip to the dealership for programming.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Engine stalling, misfiring, or running rough for no apparent reason.
- ✔ Complete no-start or intermittent starting problems.
- ✔ Noticeable decrease in fuel economy and engine power.
- ✔ Unpredictable or harsh automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions inspections.
Technical Specifications for the Wave Engine Control Module
This module is a direct replacement for a wide range of GM vehicles, restoring factory performance and functionality. By providing your VIN, you guarantee that the software loaded onto this computer is precisely correct for your vehicle’s specific configuration, including its engine, transmission, and emissions equipment. This is not a generic solution; it is a tailored component for your car. The Wave Engine Control Module is the central hub for all engine-related activities, and ensuring it has the correct, updated software is critical for long-term performance.
Guaranteed Fitment & Compatibility
This ECM is a direct replacement for the following part numbers: 12679199, 12642927, 12636386, 12621466, 12630789. Please verify that your original part number is on this list. This unit is confirmed to fit the following vehicles:
- 2011-2012 Chevrolet Cruze (1.8L)
- 2009-2011 Chevrolet Aveo
- 2013 Chevrolet Spark
- 2009-2010 Pontiac Wave
- 2013-2014 Chevrolet Trax (1.8L)
- 2012 Chevrolet Sonic (1.8L)
- 2009-2010 Pontiac G3
Frequently Asked Questions
Is this ECM ready to install when I receive it?
Yes! This ECM comes fully programmed to your vehicle’s specific VIN. In most cases, it is a plug-and-play installation. Some vehicles may require a simple security relearn procedure, which can typically be done without special tools. Instructions are available upon request.
How do I provide my VIN?
After completing your purchase, please send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship the module without it. You can usually find your VIN on your vehicle’s dashboard (visible through the windshield) or on your registration and insurance documents.
Will this fix my car’s problem for sure?
This part will correct issues directly caused by a faulty ECM. While the symptoms listed are very common for ECM failure, we always recommend having a qualified mechanic perform a thorough diagnosis to confirm the ECM is the point of failure before ordering.
What if my original part number is slightly different?
This module replaces several part numbers, as listed in the description (12679199, 12642927, 12636386, etc.). As long as your original part number is on our compatibility list, this unit will function correctly in your vehicle once programmed.
What is the difference between an ECM and a PCM?
ECM (Engine Control Module) and PCM (Powertrain Control Module) are often used interchangeably. A PCM controls both the engine and the transmission, while an ECM traditionally controls only the engine. For the vehicles this part fits, it functions as the primary engine computer.