Here are some acceleration testing results compared to a stock 2010 Silverado 5.3L 4WD truck.
Both are 4WD, both have the 5.3L engine, both have the 6L80 transmission. The 2014 has a 3.08 and the 2010 has 3.42 axle. The 2014 is a crew cab, short bed. The 2010 is an extended cab, standard bed.