diesel would be nice in anything, 3.0l jeep cherokee diesels, had 2 customers with them and they raved about fuel consumption, friend of mine with the duramax with a 8 inch lift and 35's gets the same mileage as my stock 4.8l z-71 sierra, whatever you decide most of the mid-size and full size get very comparable mileage go with the one that you like