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wondering if anyone else has this problem..it didnt happen when i first got the tuner (sct x3) whenever i try to download the tune to the truck the batteries are dead right after it downloads..and there is a loud noise coming from the front right of the engine bay..its a cylinder type thing that makes a humming noise..is this normal (the humming noise)?

and as far as the batteries going dead, do i just need to get new ones? is that the only problem?

and should i get custom tunes? are they better for yoru truck than the canned tunes?

thanks for the help guys
 
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