The differences between the Chevrolet Tahoe LS and LT are the available options. For instance, the forward collision alert feature is standard on the LT but is only an option on the LS.
The Chevrolet Tahoe LT also has a power liftgate, the Chevrolet MyLink system, and a Bose premium audio system. There is an inside auto-dimming rearview mirror, leather-appointed front bucket seats and steering column with manual tilt and telescoping features in the LT. These are not available in the LS model, and neither are power-adjusting pedals or a universal home remote, which are both available in the LT. The price difference is also a factor with the LT being more expensive than the LS.