Which is better? And how much should they cost? or is there anything better like a Factory or Tech service manual??

You wont find anything better than the FSM. But i would have to say Chiltons is better than Haynes.

 

-Brian

Ditto that. Look on Ebay for deals on manuals.

Chilton's was the only aftermarket manual printed that covered the XT6 i think. i don't think you'll find a Haynes. Chilton's is limited in scope and detail. FSM is by far the best way to go. i can probably send you a beat up chiltons for a couple dollar for shipping if you want one, i think i have a couple i don't need. (the TPS testing spec's are not right in the FSM though).