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  1. L

    Transfer Case Question

    Hello all, I'm new here. I've got a 2004 2500HD with 116xxx miles on the truck, roughly 15k on the Motor. The replacement motor is a reman from GM and runs like a raped date. I have EFI Live by Duramax Tuner ( DSP5 ) and run the truck on " sport " mode ( +80 HP ) and switch to the tow tunes when...
  2. L

    One Big Headache

    Hello all. I'd like to introduce myself here. I've been reading troubleshooting on this forum since I bought my LB7 last year. I've spent my whole life around trucks and heavy equipment, it's all I know. Now let's get down to it- My beloved truck was sent to a shop when I discovered I had a...
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