GM went with the 3.08 gears when they came out with the 6 speed trany. The 6 speed shifts through the first three gears quickly so the gearing can be higher or lower depending on how you look at it. The older trucks had 4 speed trany's requiring the 3.73 or 3.42. I have an 06 chevy with the 3.42 and with tow/haul mode its not bad when towing. It all depends on how much weight you are going to tow?
Think snow!
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