2024 Gmc Sierra 2024 Duramax Mpg. Research the 2024 gmc sierra 1500 diesel with our expert reviews and ratings. The motortrend buyer's guide has the 2024 gmc sierra 2500hd specs you need, from dimensions and cargo space to power and mpgs.
Current truck is a 2014 duramax with the 6 speed. Lifetime average was running 29.6.