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We just took a 700 mile trip in our 4x4 06 Trailblazer today with the 3.73 rear end ratio and we averaged 19.5mpg the whole way with the air on. I had the cruise set at 77mph 90% of the time. Rest of the time we were going 62mph.

I would have loved to drive my G6 with the V6 which gets 31mpg all the time for me but we couldn't get all our crap in the car :(

Anyhow, after that 10hr drive I'm off to bed!
Does teh G6 really get this type of mileage?
 
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