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swethog
Explorer
Mar 07, 2016

2015 Sierra Denali 1500 6.2L & 2016 Sunset Trail ST320BH

Hello to all and looking for some impartial third-party recommendation as I've been pulling my hair out over this.

I currently have a 2015 Sierra Denali 1500 with the 6.2L (420hp/460#) and the 8-speed. Tranny cooler. Build sheet weight is 3269#, but nadaguides, kbb, etc. say curb weight is more like 5400#. I will be going to a scale tomorrow to get a real number. GVWR is 7,200# (GMC website), GCWR is 15,000# (manual). Truck has the integrated braking controller and 3.24 gears but they do not offer the max trailering package with this truck (salesman lied to me and I believed him - first mistake).

Looking to buy a 2016 Sunset Trail ST320BH which comes in at 7700# dry, GVWR of 9744#, and tongue weight of 944#.

TT dealer is throwing in a Center Line WDH with it.

Using the Towing capacity worksheet at http://www.popthetop.com/files/
and the 3269# of the truck I come in at 88% of GCWR and life is good. Using the 5400# I have found around on the Net I come in at 102% of GCWR. Life is not so good.

My GMC guy (who lied to me originally and got an earful of it from me) of course says no-go and wants me to upgrade to a Duramax/Allison combo.

Two different camper sales places both said they wouldn't think twice about a 7700# on my truck.

We are pretty set on the ST320BH because we want bunks, TV for the kids and a bath and a half which are very hard to come by. We could probably go for the 2016 Keystone Passport Ultra Lite Grand Touring 3350BH which comes in at 6650# but we don't really like the interior as much.

I have been struggling with this for days now and am about ready to just forget the whole thing. Does anyone here have an opinion on the matter? If I need to provide other info I can.

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