Cadillac 2006 Escalade EXT Owner's Manual page 370

4. Pull the top left or right corner of the grill out so the
clips release. This will give you the needed
clearance for removing the headlamp assembly.
5-54
5. Remove the horizontal pin from the headlamp
assembly by lifting the end of the pin upward
until it unsnaps and then pulling it toward the center
of the vehicle.