Less than 76k Miles. STOP!! Read this! Gets Great Gas Mileage: 21 MPG Hwy!! How amazing is this tenacious 2011 GMC Sierra 1500 SLE1. Safety equipment includes: ABS. Traction control. Curtain airbags. Passenger Airbag. Daytime running lights...Other features include: Power locks. Power windows. Auto. Air conditioning. Cruise control. 5.3 liter V8 engine......