I have a 99 SS Convertible and I am having problems with the Air Conditioning. It only blows through the defrost vents and the floor vents. It doesn't matter what setting I put it on. Does anyone have any idea what could be wrong or what to check.? Your help would be greatly appreciated!

 

if everything else works like the temp and the fan ajust than it usually means there is a vaccume leak in you air switching lines. this runs on vaccum. usually with no vaccum it is on defrost....