WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Base Radio
Courtesy of GENERAL MOTORS CORP.
Fig 2: Power And Ground (Premium W/O RSA)
Courtesy of GENERAL MOTORS CORP.
Fig 3: Speakers And Sub-Woofers (Premium W/O RSA)
Courtesy of GENERAL MOTORS CORP.
Fig 4: Power And Ground, Remote Playback Device (Premium W/ RSA)