Cadillac 2012 CTS Owner's Manual page 317

To open the hood:
1. Pull the hood release lever with
this symbol on it. It is located
inside the vehicle on the lower
side of the instrument panel.
2. Go to the front of the vehicle and
find the secondary hood release
lever. The lever is located under
the front edge of the grille near
the center. Lift the release lever
up and raise the hood.
Before closing the hood, be sure all
the filler caps are on properly. Then
pull the hood down and close it
firmly.