The Ram 1500 is offered with either rear-wheel drive or 4-wheel drive in a host of models and configurations. Regular cab trucks seat three across and feature bed lengths of either 76 inches or 96 inches. Quad Cabs feature two smaller rear doors and seat up to six passengers, with only the 76-inch bed available. Finally, Crew Cabs have four full-sized doors, seat six with even more leg room, and are paired with either a 67-inch or 76-inch bed. Within those configurations, several different models are offered: Tradesman, Express, HFE, R/T, SLT, Lone Star/Bighorn, Outdoorsman, Sport, Laramie and Laramie Longhorn. Tradesman, HFE and SLT models benefit from the PentaStar 305-hp 3.6L V6 and 8-speed transmission, all other Ram 1500s utilize the 390-hp 5.7L Hemi V8. Base model Tradesmans come standard with blacked out grille, front fascia and bumpers, a spray-in bedliner, a Class IV receiver hitch, and Chrysler Uconnect 3.0, which features an LCD display, AM/FM stereo with remote USB, iPod integration and available SiriusXM satellite radio. The Express offers body-color grille, fascia, and bumpers, as well as 20-inch alloy wheels, dual exhaust, fog lamps and Uconnect 3.0. SLT models come with 17-inch alloy wheels, a power rear sliding window in Crew and Quad Cabs and active grille shutters, which close off airflow up front to cut drag and improve fuel economy when cooling isn't needed. Additionally, Uconnect on the SLT includes SiriusXM satellite radio. In the HFE, in addition to the SLT features, you'll find an engine stop-start system to improve fuel economy and a tri-fold tonneau cover. Ram R/T models are available only as 2-wheel drive regular cabs with the 76-inch bed. They feature 22-inch polished alloy wheels, smoked bi-functional halogen projector beam headlights, smoked LED taillights and LED interior lighting, a 7-inch instrument cluster and Uconnect 8.4, which includes an 8.4-inch touchscreen, Bluetooth hands-free connectivity, SiriusXM satellite radio, and available navigation. Sport models are equipped largely the same, but with 20-inch wheels and availability across the full range of Ram cab and driveline configurations. Big Horn and Lone Star trims add a leather-wrapped steering wheel 20-inch chrome-clad alloy wheels, overhead console with universal garage door opener, the Class IV hitch and Uconnect with a 5-inch touchscreen and Bluetooth. The Ram Outdoorsman provides a tougher exterior appearance, with the addition of off-road tires and tow hooks, as well as power folding, heated, auto-dimming side mirrors with integrated turn signals. Remote start is also included on the Outdoorsman. Finally, Laramie models boast all the bells and whistles found on other trucks in the Ram 1500 lineup, as well as dual zone automatic climate control, woodgrain interior accents, sapphire blue ambient lighting, a 9-speaker audio system, navigation, rear backup camera and driver seat and pedal memory. Range-topping Laramie Longhorns are exclusive to the Crew Cab bodies and add special badging, real wood interior accents, full-screen navigation with 3D city modeling and digital terrain modeling, HD radio, premium filigree leather seating, rear backup camera with park assist and a spray-in bedliner. Ram 1500s feature several standard safety features such as crumple zones and side-impact door beams, 4-wheel anti-lock brakes, electronic stability control, trailer sway control and front and side-impact airbags.