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45 Posts
i have a 2002 duramax and just bought a qs2 and it wont load. keeps sayin error code j1850? any help
quadzilla tuner troubles
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65 Posts
did you have the most recent download on the tuner? when i bought mine about a month ago, right out of the box there was a download it needed off of a computer that the place you bought it from should have the software and do it for free. let me know if this helps.
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