Recommended 5th Wheel Trailer Hitch and 5th Wheel Towing Capacity of 2015 GMC 3500 Denali Dually  

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Expert Reply:

Based on my research, the 5th wheel towing capacity of a 2015 GMC 3500 Denali dually depends on if you have 2WD or 4WD. If it is 2WD the capacity would be 22,900 lbs and if it is 4WD the capacity is 22,600 lbs; I do recommend verifying this with your local GMC dealer.

The fifth wheel hitch I highly recommend for your '15 GMC 3500 Denali is the Curt A20 # C16140 because it is extremely reliable and easy to use.

The A20 will give you a highly secure connection with your trailer's king pin because of its interlocking dual jaw system that wraps totally around your king pin. It also has a handy indicator system which will let you know if the jaws on the hitch are ready to couple, uncouple or tow. This color-coded system, which you can check out in the accompanying photo along with the jaws, makes the process of hooking up or disconnecting your trailer much simpler.

The Curt A20 # C16140 has a fully articulating head which also eases the coupling process and built in zerk fittings so you can lube the hitch without issue. The A20 has a 20,000 lb towing capacity and comes with a lifetime warranty.

To install this hitch in your '15 GMC Sierra 3500 Denali the best option is the Curt Custom Fifth Wheel Installation Kit for Chevy/GMC # C16411-204 because it is a custom fit that does not require drilling into your GMC's frame to install. This is not only good for the truck but also cuts down on installation time.

I have added a links to a video review of the A20 as well as a link to an install of the rail kit for you to check out.

expert reply by: Kyle S

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