WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: DTC P1415 & P1416: Air System - Bank 1 & 2 (Steps 1-7)
Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P1415 & P1416: Air System - Bank 1 & 2 (Steps 8-13)