My 2004.5 has 374,xxx miles and running great. Still running stock injectors. Nothing but maintenance, and still on original transmission. This truck is my mobile office daily driver. Here are some items recently replaced: radiator, rear end seal, alternator, new batteries, upper and lower ball joints. New rack and pinion, new outer tie rods, alignment , new brake calipers pads and rotors, brake fluid flush, new transmission cooler lines. New Rotella conversation oil and Fleet filter. New Fleet fuel filter, cleaned the bowl out real good. She's 99% stock. Only added the Banks Monster Ram intake and heater delete. I'm in Florida.