WARNING: This page is about a different car, the 2008 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Radio UC6, US8, Speakers UW4
Courtesy of GENERAL MOTORS CORP.
Fig 2: Radio U1P, Speakers UW4
Courtesy of GENERAL MOTORS CORP.
Fig 3: Radio Monsoon U1P, Speakers U65
Courtesy of GENERAL MOTORS CORP.
Fig 4: Digital Radio Receiver and Subwoofer U1P, U2K, U65