2007 Chevy 2500HD Crew mileage
Hi every one. I just completed a 567 mile round trip and the mileage was around 7.4 mpg. Empty around town or highway, im seeing 11 mpg. I'm starting to wonder if new plugs and wires are in...
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My 04 CC 4.10 rear gets around 8 towing and between 12.5 to 13.5 empty. 6 liter gasser gets the job done but is thirsty.
