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My 2012 Sonic's automatic shift button started sticking recently, and after looking over the forum and at NHSTA it appears to be a fairly common problem. As a side note, on NHSTA of 80 some complaints concerning the powertrain of the Sonic, fully 30+ (got tired of counting) were associated with...

Brought the Sonic in for a several items. I have to love the service writer's optimistic outlook on what they did. In no uncertain order: 1. Transmission shifting poorly, slow downshift, inconsistent up-shifting except with heavy throttle: outcome - normal operation, no need to reflash or...