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a family member has an 06 chevy duramax and mostly pulls a 4 horse trailer with a 12 ft livin quarters and he was wantin a chip to improve mostly fuel milege but of course everything else i was wonderin what would be the best chip for him thanks guys
a lot is goign to depend on budget. and if he already has guages for the essentials. Does he want on the fly adjustments or would something like the superchips work for him?