I have a problem with my 06 SS vapor locking when I go over Vail pass in Colorado. It did it about a mile from Eisenhower tunnel on both sides of the mountain. It was 76 degrees outside. I took it back to Chevy because I am still under warranty but they said there was nothing wrong with it. Well there is something wrong with it but I don't know how they can figure it out with out taking it back up that mountain. Has anybody else had these issues??? What do I do with this?