2025 Duramax Mpg. The duramax diesel engine and its insane torque is the best thing about this truck. The 2025 silverado 2500 duramax diesel achieved a result of 18 mpg in our testing.
Official epa estimates predict the zr2 will average 20 mpg in town and 22 mpg on the highway, for a combined rating of 21 mpg. Looking at a new 2025 at4 and just curious if the 10 speed transmission helps with mpg.
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