Pretty much the same a my '99 Suburban except the Sub has more mass/weight to it. I do notice I am pulling a trailer, not having to baby sit the thing and drive in fear from getting blown off the road. This is a 2wd 350 4l60e, much like the road master. The factory towing package includes the extra trans and oil coolers. I can hit just under 25mpg on the highway with it (no trailer). My trip from lexington, ky to cleveland last year was 24.97mpg. The most weight I have ever pulled with it was an 8700lb scissor lift for about 12 miles on the highway. No problems at all. Hey... at least they can be had pretty cheap right now.