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.
Courtesy of GENERAL MOTORS COMPANY
G104 and G106
Items
1. G104 Engine Harness
2. G106 Engine Cooling Harness and Headlamp Harness (CE4)