Chevrolet 2002 Camaro Owner's Manual page 164

Once you have loaded the discs in the magazine, slide
open the door of the compact disc (CD) changer. Push
the magazine into the changer in the direction of the
arrow marked on top of the magazine.
3-12
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 discs in the magazine.
This will continue for up to two minutes depending on
the number of discs loaded.