GM unveils updated GMC Sierra pickup

General Motors unveiled an upgraded version of the GMC Sierra 1500 full-size frame pickup. The vehicle was updated following the Chevrolet Silverado 1500, which was shown in a restyled version in September. The Sierra 1500 was refreshed inside and out, and was equipped with Super Cruise semi-autopilot. In addition, two new configurations were added - the luxurious Denali Ultimate and the AT4X, prepared for extreme off-roading.