GENERAL MOTORS 13317220, 852539. Part Number EXGM3217. Type Silencer Insert, rear muffler. Construction Year from: 02/2011; Construction Year to: 05/2012; Engine Code: F16D4; Exhaust gas standard level: E5.; Also fits:- ;Construction Year from: 02/2011; Construction Year to: 05/2012; Engine Code: F16D4; Exhaust gas standard level: E6.