Chevrolet 2004 Corvette Owner's Manual page 196

Once you have loaded the CDs in the magazine, slide
open the door of the CD changer. Push the magazine
into the changer in the direction of the arrow marked on
top of the magazine.
3-82
Close the door by sliding it all the way to the left. If the
door is left partially open, the changer will not operate
and an error will occur. When the door is closed,
the changer will begin checking for CDs in the
magazine. This will continue for up to two minutes
depending on the number of CDs loaded.