2015 GMC Yukon XL Denali MPG (6.2L, 8-speed)
We did our first road trip last weekend in our new 2015 GMC Yukon XL Denali with the 6.2L and the new 8-speed transmission. Towed my brother's boat to AZ, no trailer on the return trip. And I was real...
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Thanks for posting this. I'm really intrigued by the 6 & 8 speed transmissions. My truck missed the 6 speed by a couple of years.
