This is a cruise control button for a 1990 C4 Corvette. It should fit many GM vehicles made during the same timeframe.

3 walls
15% infill keeps the middle from shrinking to an hour glass
print either side down. back side down enable supports. The supports will need to be cleaned and the small hole cleaned out. Print the other way without supports, and the front of the button will look like crap, but the back will fit nicely. pick your poison. sand and wipe doen with acetone to bring back the shine.