I prefer the 3:90's, both of us had 3:23's in them stock, mine seems to pull a little harder, but not much difference in the two. He is running a 20" wheel and I am running a 22" wheel. The difference between the two is very small, but I think after driving my truck he wished he would have went with the 90's.

 

the tires i plan on getting are around 29 inches tall. the factorys are 31 inches. i think the 3.73s along with the shorter tire will give me a good combo. it should be close to 4.10s after you put the math to it.

 

Yes! I just got mine installed yesterday and they are great! The guy that was doing my install said that GM gears are nice but suck to setup because they have such a tight pattern. I went with Yukon gears and they set up right the first time with .008" lash and a great pattern. No wine at all.