I had my truck in for an oil change yesterday( Royal Purple and K& N) and complained about a rattle that I thought was comming from the back of the truck. The mechanic came back saying that I need my Idler Arms replaced. The dealer will do it under warranty. My truck only has 41000 KM on it or about 25000 miles. Does this sound normal? It seems early to me.

 

chit does happen sometimes. It is early but maybe you just got a bum set.