I've always had extremely good results with GM products in general, particularly Chevy trucks. I don't know how it is in your area but around here in the mountains of VA where it snows you can hardly give away a 2wd truck. Therefore, resale on one is very very low. If that's not an issue for you then no problem.
The 4.3L V6 in the 2014 and newer is a different engine than the old 4.3L V6 that was introduced in the 80's. The old one was a great engine. I don't have any experience with the new one but 2014 was the first year it was used in the Silverado. The 6 speed transmission is great, there shouldn't be any problems with it.