Towing our 2015 321 rsts with a 2009 2500HD, extended cab, long box, 4:10, 6.0, 6 spd trans. Max tow rating on truck is 12,300; GVW of 5er is 12, 500.
Truck is base 'work truck' so I have some extra payload capacity without all the bells & whistles.
Have towed through Rockies on I90 and all the way to Alaska & back with no issues whatsoever. Truck handles towing flawlessly. 8-9 mpg but it does get thirsty (6.x on long climbs and headwinds.
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Nodaker
Bismarck, ND
2010 Jayco Melbourne 29 ds
2011 Chevy Colorado
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