Models also known as Trim Levels, are used to identify a vehicle's level of equipment or special features.
Everything, awesome vehicle. Best vehicle I ever had. 470000 Miles on it. Completely loaded. Other than brakes and tires nothing really wrong. Replaced front hub bearings and some tie rod ends. The truck has been excellent to own. Nothing bad.
Fuel mileage. There are no cons on this truck. It has been and awesome truck. Very little maintenance. GMC sierra is the best truck on the market. The fuel mileage is the only downfall for this truck. The truck met and has exceeded anything I have ever had.
From the Vehicle History blog