gm chevy active fuel management afm dod disable kit for 2005-2006 5.3l envoy trailblazer ams this kit includes everything needed to delete afm/dod (active fuel management) from 05-06 gm 5.3l engines. this kit fits: gmc envoy, hummer h3, buick rainier, saab 9-7x, chevy trailblazer (8th digit of vin "m")