I was REALLY surprised by this … 2025 GMC Canyon Highway Fuel Economy Test

Today, after over a year and a half and 4,000 miles of ownership, I’m finally taking my 2025 GMC Canyon Denali on the highway for a true highway fuel test! Unfortunately, I can’t use the same credit card at the same gas station twice in one day, so I can’t compare the mileage the truck reported to how many gallons it actually used.

-John

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