2024 Sierra 2024 Denali Duramax. Sb (5.3l 8cyl 10a) 55 of 58 people found this review helpful we purchased a 2023 gmc sierra denali recently and have. 3916 posts · joined 2017.

I have seen 20 on a drive that was 2 lane roads and 65 mph speed limit about 50 miles each way. The 2024 gmc yukon will continue to offer the 3.0l i6 lm2 turbodiesel.