No, it was listed in the standard equipment side. Maybe its a Chevy thing, but the 3.42s are standard with the z71 package. I did notice that the 4.8 came with the 3.73s. Heres a listing for 2,

http://www.gmbuypower.com/nvlWindowS...Box%204WD%20LT

Now heres one with the 3.73s but you have to pay for it.

http://www.gmbuypower.com/nvlWindowS...Box%204WD%20LT

I mean come on, I ve paid for the off road package, I ve paid for the HD trailing, but they didnt add a friggin measly $100 for the right gears?? Its my fault, I shouldnt have assumed, but I just dont understand them not putting the gears in a towing package. I could understand 4.10s but 3.73s are the perfect gear ratio but towing and highway.

 

Mastercraft is a damn good tire in overall quality. I haven't tried their all terrains but I know of people that have them and they hold up well. If you're looking for a good all around tire, look into some Toyo Open Country A/T's. I have them on my stock wheels and I'm very happy with them.