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Re: Yet another GMC build
Took the truck to the dyno for a tune. Didn’t get finished. Idle, trans shifting, part throttle pretty much done but full throttle not so much. Not enough fuel pump and goes lean above 5k. Will install a 255 lph pump and get it back up there. I can tell you this ...the 6.0 is WAY more powerful than the 5.3 was. Not even close!
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