If you want to know the differences between the standard features and options that were available on the LS, LT and LTZ go to the link below and then click on the menues on the left and you can find anything you want to know. This is for the 2011 but other years will be similiar. This ordering information is also still available for the 2010 and for the 2012's.
http://eogld.ecomm.gm.com/NASApp/do...vehicleID=10383§ion=oi_def&page=3&butID=3
