<Li> Cristela Alonzo as Cruz Ramirez, Lightning McQueen's trainer and racing technician, who always longed to be a racer, but lacked confidence . She later becomes the racer for Dinoco; #51 . </Li> <Li> Chris Cooper as Smokey, Doc's former mechanic and crew chief, who helps Lightning McQueen train for the Florida 500 . </Li> <Li> Nathan Fillion as Sterling, a rich business car who runs the elite training facility Rust - eze Racing Center, who challenges McQueen's position as a racer . </Li> <Li> Larry the Cable Guy as Mater, a jolly tow truck and Lightning McQueen's best friend . </Li>

Who does the voice for sterling in cars 3