I have a similar model to yours. I have towed our rig with a 2014 Chevy C3500 long bed and my current Chevy dually. The dually does a better job. Below are pics of our weights (Me + DW + 70lbs Aussie + 50lbs Heeler) and the truck with just me inside.
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MikenDebbie Aggie ‘77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
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