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.
NOTE:
Mind the installation position of the hydraulic valve lash adjuster arms.
Remove the 16 hydraulic valve lash adjuster arms (1).