Parallel lineups stated foundation LS and LS 3.5 versions with a 211-bhp 3.5 V-6, additionally LT 3.9 and luxury LTZ versions with a 242-bhp 3.9-liter V-6. A luxurious-oriented LTZ sedan with normal automated, heated leather seats, and high quality audio highlighted an normally stand-pat 2006 time. A cost-chief sedan utilized the 145-bhp 2.2-liter Ecotec 4-cylinder, but that was mostly for advertising....