[engairuph]

I have a 5.3 factory with 4L80e that has been built extreme and have no problems jumping into it, towing or just driving. 20.2 70mpg hwy 3:73 rear gears. It has no hesitation off the line and last longer then the 4L60e in my opinion and experience.
The 5.3 are easy on parts, and available at any parts house that I've come across.