305 HP The standard features of the Chevrolet Impala Premier include V6 305hp engine, 6speed automatic transmission with overdrive, 4wheel antilock brakes (ABS), integrated navigation system, side seat mounted airbags, curtain 1st and 2nd row overhead airbags, rear sideimpact airbag, driver and passenger knee airbag, airbag occupancy sensor, automatic air conditioning, 19" aluminum ...