Instrumented Test: 2014 GMC Sierra 1500 5.3L 4×4 Crew Cab 2014 GMC Sierra 1500 5.3L 4x4 Crew Cab Instrumented Test: 2014 GMC Sierra 1500 5.3L 4×4 Crew Cab Instrumented Test: 2014 GMC Sierra 1500 5.3L 4×4 Crew Cab GMC Sierra