The entry-level model, known simply as Base, covers the truck basics without a lot of extras, but it still has a decent amount of equipment. It's offered only as an extended cab, and standard features include a 2.5-liter inline four-cylinder engine (200 horsepower and 191 pound-feet of torque), a six-speed manual transmission, 16-inch steel wheels, air conditioning, vinyl upholstery and floor covering, a four-way power driver's seat with manual recline, front bucket seats, a tilt-only adjustable steering wheel, and power windows. You also get a rearview camera, a 7-inch infotainment system (GM's new Infotainment 3 system), Apple CarPlay and Android Auto, two USB ports, and a six-speaker sound system. There aren't too many changes when you step up to the Work Truck (WT) model. But it does come in both extended-cab and crew-cab body styles and adds fold-up rear jump seats (extended-cab models only), cloth upholstery, carpeting and floor mats. Notable options for the WT include remote keyless entry, cruise control, an EZ-Lift tailgate, and OnStar telematics (roadside assistance, turn-by-turn navigation, automatic crash response) and 4G LTE Wi-Fi hotspot connectivity. If you don't want to sort through all the WT's options sheets, you can simply spring for the LT, which gets you most of the above items, plus 17-inch alloy wheels, a leather-wrapped tilt-and-telescoping steering wheel, an 8-inch touchscreen, satellite radio, OnStar and additional USB ports. More options are available for the LT, the most notable being heated front seats, automatic climate control, heated exterior mirrors, and forward collision and lane departure warning systems. For LT models and above, there's an available seven-speaker premium Bose audio system and a navigation system. For more luxury items and some mild off-road ability, you'll want to check out the Z71. It comes standard with most of the LT's optional equipment, plus it adds dark-tinted 17-inch alloy wheels, all-terrain tires (instead