ENGINE 4.3L FLEXFUEL ECOTEC3 V6 WITH ACTIVE FUEL MANAGEMENT DIRECT INJECTION AND VARIABLE VALVE TIMING includes aluminum block construction with (FHS) E85 FlexFuel capability capable of running on unleaded or up to 85% ethanol (285 hp [212 kW] @ 5300 rpm 305 lb-ft of torque [413 Nm] @ 3900 rpm) (STD) (Includes (FHS) E85 FlexFuel capability.