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    Mileage MPG?

    I am getting like 10 miles to the gallon on my 99 Youkon 5.7 is that normal???? What are you getting for mileage in your V8 gas engine ........and what mods helped? Thanks in advance. TC
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    Mystery Stumble...

    Random stumble dist I had the same thing happen. It was very sporadic and the tach dropped. I did a tune up still had a stumble once in a while. one day it was running fine........ next day would not start. I had to tow it to the mechanic! It was the distributor, the gear on the bottom...
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