I've taken many road trips in my truck. It is a 5 speed manual and has gotten up to 31.25 miles per gallon on the highway. I get 21 miles per gallon in town. The power isn't too bad with the manual transmission either. All in all, I would say it's a pretty sweet truck.
Owned for a year. Previous owner took care of the truck and kept it clean and serviced. I am doing the same. It runs well and am impressed by the quality of engineering. The ride is excellent, especially for a truck. As long as I keep it serviced on time I have seen no indication of any service issues either in person or in the internet.
I have the 4wd work truck and bought it new and have not had any mechanical problems except that sometimes it wont start on first turn off the key and the check engine light comes on periodically though the gas mileage is slightly less than advertised and it is hard to park in a tight space due to it having a 40 foot turning radius
I have had the truck a couple of weeks. I had to take into the shop after having it for 1 week. It ended up need a new head cylinder that Chevy paid for. Other than that the truck is great. It does everything that you need to do for around a house. If you want something that will towing a lot then get a full size. If you are not going to tow get this truck!