In the Book
In the Movie
Sal and Carlo see Dean off to Denver. He goes alone.
Carlo goes with Dean to Denver. Sal sees them off.
Sal takes several rides into Denver, ending with a ride with a business man.
He gets on a truck and they take him all the way.
Sal goes to visit Chad King when he first arrives in Denver. Chad is no longer friends with Dean, so he doesn't know where he is.
He goes to Carlo's apartment first. Carlo then takes Sal to visit Dean who is with Camile.
Carlo calls Sal in Denver and gives him directions to he apartment.
Sal goes directly to Carlo's place.
When Carlo takes Sal to Dean's place he decides at the last minute to hide so Camile can't see him. He doesn't give a reason why.
Carlo tells Sal that Camile is angry with him and that is why he hides after he knocks on the door.