The LS is considered the base model Suburban. The LT model has leather seats, LS has cloth. The LT has rear bucket seats and holds up to 8 people, while the LS has the split-bench seat and holds up to 9 people. The LT also has Bluetooth, adjustable pedals, automatic climate control, and a power front passenger seat. The LT also has standard Fog Lamps and Parking Assist. Some of the features of the LT are available as upgrades on the LS, so you may want to check with a dealer before you fork over the extra money for the LT.