2025 Gmc Denali 2025 Duramax Specs. The 2025 gmc yukon will continue to offer the 3.0l i6 lm2 turbodiesel duramax engine, rather than the 3.0l i6 lz0 engine expected originally. Current truck is a 2014 duramax with the 6 speed.

The 2025 sierra 1500 denali ultimate crew cab is offered in a 4wd. 2025 gmc sierra 2025 duramax specs.