Why would the air vents not work in a Chevy Cavalier?
there may be a pen or something lodged inside the vent doors, or bad vacuum lines or motor..read up on it everyone should have a manual for their vehicle, and a professional shop manual should be available at the library in the reference section--you can make copies of the necessary information...good luck :)
How do you fix the vent selector on a 2000 Chevy Cavalier that does not adjust which vents the air blows from?
as long as the transmissions are the same yes but there may be a wiring difference as well as cv joint size difference To make this transmission work you would have to change all the electrical from the 2003 and put it into the 99 model year. This would be a very big job that most transmission shop will not touch