I guess I was expecting/hoping for mpg to be 18-20 mpg, then settling for a V6 would feel better. I've had trucks for ....wow almost 30 years, feeling old now... have motors come a long ways...yes, but just like the old straight 6's vs V8, you can tell when you have a either the 6 cylinder or the V8. I've always been a bit of a gearhead so you can throw that into the equation. I liked a V6 when I had a little Chevy S-10, that V6 was a good one, it outlasted the truck! When I traded that in, it felt like I had worn that truck down to just me, the bench seat, motor and trans, everything else was disintegrating, body rusted out, brakes were shot.
With the 4.3 and the 5.3 being so close, I'm skipping to the 6.2 or whatever they have that's similar in 2020 (I'm holding out and promised the wife I would keep the truck 5 years) unless the motor they put in the 2020 is a brand new 1st edition type, as we all know there's kinks to work out when something brand new comes out.