I just bought my first Ford 6.0. It's a 2003 left over, crew cab, 4x4, long bed. I often pull heavy loads and I would like some input from you guys regarding the best superchip for my truck which does not void the warranty.

 

Any of them COULD cause some warranty concerns...
a few of us have gotten the Diablo Predator programmer from the Parts Shop link in upper right corner of this page and had good results.. ( or click the blue words Diablo Predator to jump right there) (and call them for pricing - the $419 is the MSRP - just like on our trucks !!!) Did you pay MSRP ????

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But really depends on what you're looking for...
there is a lot of info out there... do a search and see what's been said about all the shifting issues of the edge, quadzilla, etc, modules...
information is POWER

 

There is no chip for you truck. The P-tech computer has no service port for a chip. External fueling boxes, and the Diablo Predator programmer are the options at this time.