http://eogld.ecomm.gm.com/NASApp/dom...&page=&butID=1
Effective 6/18/2007, the following changes will be made to the Vehicle Order Guide:
Interior section-(Y40) Luxury Level One Package, changed footnote to read "Requires (Y44) Seating Package. (U2R) AM/FM stereo with 6-disc in-dash CD changer and MP3 playback is upgradeable to (U2S) AM/FM stereo with DVD player, MP3 playback and Bose 5.1 Cabin Surround Sound 10-speaker system or (UAV) AM/FM stereo with DVD player, MP3 playback, Bose 5.1 Cabin Surround Sound 10-speaker system and DVD-based navigation. (P62) 17" x 8" (43.2 cm x 20.3 cm) machined-faced aluminum wheels replace (P61) 17" x 8" (43.2 cm x 20.3 cm) painted aluminum wheels when (Y40) is ordered.".
Interior section-(UAV) Audio system with navigation, changed short description to read "AM/FM stereo with DVD player, MP3 playback, Bose 5.1 Cabin Surround Sound 10-speaker system and DVD-based navigation".
Mechanical section-(LLT) Engine, 3.6L Variable Valve Timing SIDI Direct Injection, changed long description to read "(304 hp [226.7 kW] @ 6400 rpm, 273 lb-ft of torque [368.6 N-m] @ 5200 rpm)".