WARNING: This page is about a different car, the 2011 Chevrolet Cruze. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Oil Cooler
Courtesy of GENERAL MOTORS CORP.
Remove the 6 engine oil cooler bolts (3), the engine oil cooler (1) and the engine oil cooler gasket (2) from the engine oil cooler housing.