I have a 3500 dually with the air suspension and it is not moving. I don't have any errors or idiot lights. The display says it has achieved alt height and low and back to normal height. I first tried to use it yesterday when hooking up my car hauler trailer. I've never had a truck with this suspension so I thought I must have been missing a step like applying the park brake. I've watched the Ram video and others and it seems pretty straight for so I'm thinking something is wrong but want to make sure before I take it to the dealer. Any help is appreciated.