Heavy Haulers

When the all-new Silverado arrived for 1999, GM kept building the old heavy-duty GMT400 trucks alongside it for two more years before the GMT800 HD finally replaced them in 2001.

This Silverado swept both major truck awards in its debut year — North American Truck of the Year and Motor Trend's Truck of the Year, same truck, same year.

When this GMT900 Sierra launched for 2007, GM kept selling the outgoing truck alongside it, badged "Classic," so buyers could choose old or new side by side on the same lot.

This Sierra kept rolling off the line for a full extra year after its replacement arrived - badged "Classic" in 2007 just to tell the two generations apart on dealer lots.