Aero Shutter (active grille) Modification

**UPDATE 4/4/2025**
The .stp and .igs source files are added.
They were added long ago but for some reason they disappeared.
Be sure to print the rotor on its side so that the print traces form "L"-shaped patterns between the top block and the spline shaft.
Otherwise you will have a weakened area at their junction.


**Overview-**
These parts apply to the “aero grille shutter” function that may be fitted to GM 1.4 (LUJ) engine “ECO” vehicles including gen1 Cruze and perhaps others.
No diagnostic trouble codes (DTCs) should be set during operation because the motor will continue to operate within its normal rotation range but will not drive the shutters closed.

The installation of these parts is described in great detail on the CruzeTalk forum at-
https://www.cruzetalk.com/threads/how-to-electrical-control-of-the-1-4t-luj-thermostat-and-defeating-aero-grille-shutters.255195/

**Background-**
If you feel that your vehicle runs too hot and you have either changed the thermostat’s wax m