GXP and Saturn Sky Red Line. On 16 August 2007, Chevrolet officially revealed the 2008 Chevrolet HHR SS Turbocharged at the Woodward Dream Cruise in Birmingham . [ 6 ] [ 7 ] It was introduced as a 2008 model in fall 2007. The SS Turbocharged features a 2.0 L (120 cu in) turbocharged