This listing is for an Melling Stock Replacement Hydraulic Roller Camshaft, Elgin Industries Lifters and Cloyes Gear 3pc timing kit for 2007-2013 GM GMC Trucks with the 325 CID (5.3L) ELECTRIC/GAS,FLEX or GAS engines with Active Fuel Management(AFM). This camshaft has a SINGLE BOLT cam gear and 4 sensor. This kit fits engines with VIN Codes “3”, “7”, “M”, “J” or “0”. VIN refers to the 8th character in the vehicles ID in lower dash reading from left to right. NOTE: AFM lifters fail due to a faulty VLOM (valley cover) – Updated VLOM# 12571609 from GM must be installed with new lifter to prevent future failures and warranty coverage.