gm chevy active fuel management afm dod disable kit for 5.3l ls4 car engines ams this kit includes everything needed to delete afm/dod (active fuel management) from gm 5.3l ls4 engines. fits: 2007–2008 pontiac grand prix gxp 2007–2009 chevrolet impala ss 2007 chevrolet monte carlo ss 2008–2009 buick lacrosse super