WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
Remove the 9 engine front lower cover bolts (1).
Install 2 engine front lower cover bolts (2, 3) to the intended bores, to loosen the engine front lower cover (1).