Climbing (literally) behind the wheel of GMC’s All Mountain Concept

Digital Trends
There are an unlimited number of ways one can customize a GMC Sierra 2500HD. That’s, of course, without the consideration of cost. Want to turn one into a 10-second dragster? You totally can since, well, anything’s possible with the right amount of money. But turning one of GMC’s flagship trucks into a …
Climbing (literally) behind the wheel of GMC’s All Mountain Concept