PickupTrucks.coms Mark Williams interviews Executive Chief Engineer Jeff Luke about the 2014 Chevrolet Silverado 1500 and 2014 GMC Sierra 1500.\r<br>\r<br>\r<br>\r<br>\r<br>\r<br>\r<br>\r<br>PickupTrucks.coms Mark Williams interviews Executive Chief Engineer Jeff Luke about the 2014 Chevrolet Silverado 1500 and 2014 GMC Sierra 1500.
