I dont have a diesel pickup yet , i"m researching . I have a 2000 GMC extended cab Z71 5.3 . I haul a 2000 lb camper with it , I"m thinkin a 3/4 ton diesel would be better. So do I want a Ford,Dodge or GM ? Im not rich , so a used truck , like 2000 to 2005 . Any thoughts? Thanks.