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Re: Poor Fuel Economy - Advice?
My Yukon weighs about 6700 lbs, and with the 5.3 I get around 15-16, but can do a bit better. I've got pretty low rear gears, so my worst mpg is the 10-35mph stop n go stuff. 40+ cruising and it improves drastically.
The stock intake and exhaust system is pretty restrictive, so there are mpg and power gains available there (but the cost doesn't always offset the mpg difference).
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING 
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