I installed Katzkin leather seat covers in my 2011 crewcab Silverado almost 7 years ago. Excellent fit and finish and they have held up very well. Kit cost me $495.00 and I spent 2 separate weekends removing the junk factory cloth and installing the leather. GM price was something like $3500.00+ for the complete kit lol. Take your time and they'll look seamless when done. I've seen so many that have wrinkles and in general just don't look tight and right because they got in a hurry to finish.
I was looking for this same thing last week trying to decide to keep the Silverado or sell it and get something newer later. Can't find as my older car Katzkin's cheap now, getting closed out I guess.