ChevySilveradoZ712500Hd

Click the image above for more "Big Red"Even though Chevy denies buyers a Z71 version of the Silverado 2500HD, it wants you to know how cool it could be. Say hello to "Big Red," powered by a 6.6-liter Duramax diesel backed by a six-speed Allison transmission, it combines a number of GM performance ...