Models also known as Trim Levels, are used to identify a vehicle's level of equipment or special features.
Lots of power, good handling, great towing capabilities, enough room for the family. It has been very reliable with very little maintenance. Highly recommend when you are looking for a truck with room for the family.
The gas mileage is what you would expect for a full size diesel truck. They front end is very heavy, with a light rear end which will need weight in snowy conditions. The SLT does not come with a on the fly 4 wheel drive.
From the Vehicle History blog