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GMT 900 Trucks General Discussion 2007 - 2013 Trucks | General Discussion

6.2 mpg

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Old 10-11-2010, 11:00 PM
  #11  
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get about 14.5 average stop go. Freeway on a full tank is rare but it got 18.5ish loaded down with about 300 pounds in the bed

2010 Sierra denali
air-aid jr tube

Just now put a 160 thermostat and 90mm throttle body need to get a retune to see how it is will be making a good long haul this weekend.
Old 10-12-2010, 01:51 AM
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I get about 10-11 in the city, about 15-17 on the highway.

Tend to get pissed off a lot in SoCal traffic. Have to get around the idiots quick.

Got a 2010 4x4 LTZ 6.2L NHT package with 3.73. Everything is stock on the truck, except a tonneau which doesnt make any difference.

Im guessing a lot of the guys getting better mileage are 2wd and/or tuned.
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