purchased a 6.2
https://www.performancetrucks.net/fo...d.php?t=482901

 

6.2

If you keep your boot out of it they are no worse on fuel than the 5.3

 

That's kinda what I needed to hear. I know I'd be happier with the 6.2 performance but a bit worried about the MPG. Also once in a blue moon I use the 4x4 but don't really need it.

 

I Just picked up a 2011 GMC Sierra Texas Edition 6.2L Storm Grey metallic, I absolutely love it. Im just pissed they filled it up with 87 octane, but it still have leaps and bounds more power than my 2010 GMC 5.3L/6Speed.

 

So compare to your 5.3 6spd it is a lot better? I had a 5.3 4 spd and I'm not sure how much better the 6.2 is over the 5.3 when both have the 6spd. The other difference would be 6.2 2 wheel vs 5.3 4 wheel. Is the 5.3 enough for a hot rodder at heart? Thinking I'll drive a bit nicer in the 5.3 4 wheel just cause the power isn't as readily available and it might keep me out of trouble!

 

6.2 2wd might actually get better mpg than 5.3 4wd. Anyway, I had the choice between 4wd 6.2 NHT and 4wd 5.3 Z71. Went with the NHT 4x4 and I don't regret passing on the 5.3 in the least. However, if you think you'll ever need the 4x4 I would recommend finding a dealer with an NHT 4x4 in stock. I was able to find 3 or 4 within a few hours of me when I purchased mine a few months ago.

 

i got the 5.3 6 speed. tuned.. runs great imo... but i do wish i would have went 6.2.. i tuned out the afm... runs alot better... but like everyone else said find ya a 6.2.. but if you find a great deal on a 5.3.. do it. get it tuned and trust me u will love it also. i do..

 

6.2 all the way

 

just got home with the 6.2 for an over night demo. i'll snap some pics and then go put a few miles on it. going to drive the 5.3 more in the morning.