What does rs mean on a chevy sonic?

The RS badge on a Chevy Sonic indicates that it is the Rally Sport trim level. This is an upgrade from the base trim and it includes some interior changes as well as a bit more of a sporty feel. This is achieved through a different suspension. Chevrolet has a long record of using different trim badges on their vehicles to let owners know what version they have. Each trim that they offer will have different things that area added, and there is usually a flagship trim that has all of the options of the other trims added to it. If You get an RS trim You should know that is the one that is more sport oriented rather than comfort or luxury oriented.