WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View of Cylinder Head Assembly
Courtesy of GENERAL MOTORS CORP.
Remove the right cylinder head bolts.
Remove the right cylinder head.
Fig 2: View Of Right Cylinder Head Gasket
Courtesy of GENERAL MOTORS CORP.
Remove and discard the right cylinder head gasket.