Changing running gears
My 2005 GMC Sierra 1500 has the 5.3L (300hp) with 3.23 gears. I'm towing an 18' TT with a stated dry weight of 3215 pounds and I realize that this number is only a starting point for what I will be t...
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I use the tow/haul mode but it only changes shift points and does nothing for the torque band. The 2005 has the 4 speed auto. I even considered a swap for the newer 6 speed but it's quite an ordeal since the newer tranny is longer.
