The 2015 GMC Sierra 1500, part of the third generation, is a full-size pickup truck known for its powerful performance and comfortable ride. It is offered in four trim levels: base, SLE, SLT, and Denali. The engine choices include a 285-hp 4.3L V6, a 355-hp 5.3L V8, and a 420-hp 6.2L V8. All come with a six-speed automatic that directs power up to the rear wheels, or optionally, all four. Inside, it offers a well-designed, roomy cabin with high-tech features. A 4.2-inch color display comes standard, with an 8-inch touchscreen available on higher trims—both equipped with Apple CarPlay and Android Auto. Safety is well-addressed with standard features like antilock disc brakes, traction and stability control, and a comprehensive suite of airbags. Forward collision alert and lane-departure warning are available on premium trims.