In El Materdor, Chuy is the first bulldozer that Mater fights, until the bulldozer summons reinforcements. One time, Chuy scrapes one of his caterpillar tracks against the ground to beat Mater. Chuy later gains a black eye. He also appears at the end with the other bulldozers and they chased McQueen due to his red paint job.
He presumably appears in the closing credits of Cars 2 with some other bulldozers.