TravisH

iTrader: (1)

Im pretty sure they are 3.42's but I'm not sure, they might be 3.73's. Is there a code or something in the glovebox that would tell me this?If so, what are the codes for both?

ONLYA4.8L

I think I your glove box It will say GT something... Not positive but I think GT3 is 3:73..

1slow01Z71

iTrader: (36)

Look on the sitcker in your glove box there should be one that says GT4 for 3.73 cause thats what you should have. Here are the three codes anyway

GT4=3.73
GU6=3.42
GT5=4.10

Tan327

iTrader: (15)

Yep it's a sticker in the glovebox in the larger department, scan through all of the codes on the sticker. 3.73 =GT4, 4.10 = GT5, I'm not sure on the other but tell me if those two codes didn't help and I'll look it up..

TravisH

iTrader: (1)

GT4! Sweet! Thats what I was hoping for. I dont know what made me think I had 3.42's..

1slow01Z71

iTrader: (36)

3.42s to my knowledge are found in the new L33 Z71s.

TravisH

iTrader: (1)

ah, ic ic.

dirtdiggler02

iTrader: (7)

if all else fails, the old fashion way is to jack it uo and see how many times the driveshaft spins to 1 time that the rear tire spins.

BlownChevy

iTrader: (20)

PM me your Vin, I will tell ya.

02BlueStepside

iTrader: (1)

I didn't know what the codes were, and this is what I would have suggested