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5.3 or 6 Liter Engine

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Looking at GMC Yukon Denali XL - 2002-2006. They have a 5.3 or 6.0 liter engine. I don't do much towing. Am I going to get a lot worse gas mileage out of the 6.0? Is my best bet the 5.3? AWD vs 4WD - do I lose a lot on gas mileage there, too? Is 4x4 still better for longevity than AWD?

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Posted by: @dan-schulz

Am I going to get a lot worse gas mileage out of the 6.0?

Not much according to this website:

https://www.fuelly.com/car/gmc/yukon/2002?engineconfig_id=63&bodytype_id=&submodel_id=

 

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