I heard on the morning news that GM is instructing its employees to always refer to Chevrolet as Chevrolet, not as Chevy. They apparently want to portray a grown-up, mature brand.
Good luck with that.
 Chevy is ingrained in the culture.  They'll have to retrain thousands of NASCAR fans.  
They'll have to get songs re-written: "Drove my Chevrolet to the levr-o-let but the levr-o-let was dry"
 It's good for Dodge (Ram) and Ford, through--they only have one syllable.  Easier to say.
 
