I haven't driven a 6.2 or 4.3.
I expect the 6.2 to be faster than my 315 HP 5.3. It would be sad if it wasn't.
But I really don't understand the misleading comments about the 5.3 being a dog.
Same for the 4.3. I have to see a 4.3 equipped truck stranded on the merge lane because he couldn't make it. No luck so far.
My 5.3 pulls everything I need.
3,500 lbs lab saw trailer, 5,000 lbs generator, 7,600 lbs utility trailer or my boat. I never felt the NEED for more power.
It would be nice to have more power, but I don't care that my truck is a few seconds slower. Those two or three seconds will not rectify the expensive 6.2.
Even a 4.3 would do the job. The only reason that I chose a V8 over a V6 is... well, it's a German thing...lol
so long
j-ten-ner