GMT 800 & Older GM General Discussion 2006 & Older Trucks | General Discussion

Gas mileage?

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Old Apr 23, 2007 | 11:49 PM
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Tim_WS6's Avatar
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Default Gas mileage?

what kind of gas mileage are you guys getting out of your 4.8 with a 5spd? I'm kinda looking at an '04 rst rcsb that combo for my dd. all input is appreciated!
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Old Apr 23, 2007 | 11:57 PM
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my 2002 got 17mpg
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Old Apr 24, 2007 | 12:03 AM
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with RCSB 4.8, nelson tune, 4.11 gears, no cats, magnaflow single in dual out, i was getting 17 city - 21 hwy on heavy heavy 20's
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