**** STEP UP TO GMC **** And step up to 'Professional Grade'. We are just as serious about our trucks as you are. They are built to withstand the test of time and to help you get the job done right the first time. Now you can work hard and play hard courtesy of our 2011 GMC Sierra 1500. The 1500 designates this full-size pickup as the half-ton model and it is equipped with the powerful 5.3L engine. Oh yeah!