What Motor Is The 5.3 Vortec?
What Motor Is The 5.3 Vortec? Type:5.3L Gen IV V8 Small Block Bore x stroke: 96.01 x 92mm Fuel system: Sequential fuel injection Fuel Type: Regular unleaded and E85 Flex Fuel Maximum Engine Speed: 6000 RPM Is a 5.3 Vortec an LS motor? Although Vortec engines are “LS” based they are NOT LS engines IMO.