With the 1-ton Chevy or GMC Duramax/Allison crew cab standard box 4WD, you pick up a few more pounds in rating for towing a 5th wheel than with a 3/4-ton....my understanding is they are equipped the same on the rear suspension except the 1-ton has another leaf in the springs to allow for the extra load rating.....15800-vs-17000 lbs.
Lloyd & Kathy & Kit(17 yr old cat)
2014 Forest River Cedar Creek Silverback 33RL
2016 Chevy 3500HD Z71 LTZ 4WD Crew Cab, DuraMax/Allison.
2014 - 38 nights/3500 mi.
2015 - 66 nights/6260 mi.
2016 - 33 nights/4707 mi.