6.0 Liter Flex-Fuel OHV 16-Valve VVT Vortec V8 2013 GMC Sierra 3500HD Engine

6.0 Liter Flex-Fuel OHV 16-Valve VVT Vortec V8 Engine on the 2013 GMC Sierra 3500HD SLT Extended Cab 4x4 Chassis