The 2018 Toyota Tundra is a full-size pickup that is available in one of five trim levels: the base SR, SR5, Limited, Platinum and 1794 Edition. Going with the SR5 gets you foglights, variable intermittent windshield wipers and an upgraded tech interface that includes a 7-inch touchscreen, HD and satellite radio, traffic information and a navigation app. The crew cab adds a power-opening rear window and an overhead console. The SR5's Upgrade package adds front bucket seats with a power-adjustable driver seat, a center console, a tilt-and-telescoping steering wheel, an auto-dimming rearview mirror, and a larger 38-gallon gas tank when equipped with the 5.7-liter V8. There's also a TRD Sport package that adds 20-inch wheels, a sport-tuned suspension, a hood scoop, body-colored mirrors and bumpers, LED headlights and foglights. The Limited builds on the Upgrade options package equipment with 20-inch alloy wheels, automatic headlights, movable tie-down cleats, automatic dual-zone climate control, leather upholstery, an upgraded power driver seat and a power-adjustable passenger seat, a power horizontal-sliding rear window.