A dump truck needs to rely on the help of his friends when he attempts to show that he can help things run smoothly at the truck stop; Chuck starts exercising to the extreme to prevent any future breakdowns.

Chuck accidentally breaks an important piece of Mom's equipment, and Chuck experiments with a number of ways to get bigger.

Chuck and friends help Rowdy out of the mud for Rally's race, and the gang tries to figure out flying.

Chuck and his pals build a fort. They also play circus but Boomer becomes embarrassed when he falls doing a trick.

When Chuck gets nervous about a trip to the mechanic's, his friends do their best to hide him. Chuck does a poor job on his chores.

Chuck and friends dig a deep hole looking for treasure and accidentally get themselves stuck at the bottom, and the gang makes a movie.