The Tahoe's mid-level LT trim is further divided into three tiers: LT-1, LT-2, and LT-3.  More standard features are added as the the numbers ascend.  The LT-3 is the most upscale offering within this style, adding several additional luxury features, 4WD and the larger 5.3 liter V-8.  Along with all of the LT-2's items, like leather seats, a CD changer, remote starter and rear park assist, the LT-3 gets heated front seats, a 12-way power driver's seat, a premium BOse audio system and XM satellite radio.  A rear seat DVD entertainment system and a navigation system are both optional.