WARNING: This page is about a different car, the 2005 GMC Savana and 2005 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Water Outlet Stud Ground Wire
Courtesy of GENERAL MOTORS CORP.
Remove the air cleaner assembly end cover clips.
Remove the air cleaner cover from the air cleaner assembly (4).