Did Chevy offer a towing package as an option and do you have it installed ?
Unloaded that trailer weighs 4000 lbs. You might be surprised how fast you can add 1000 lbs ! The other big issue is what are you going to have in the truck. 4 people ? How much in the bed ? What is the GVWR for the truck and the GCVWR (truck and trailer) ?
The other big factor is type of towing. Flat, hills or mountains ?
Yes, you are borderline, but it is doable. Just watch what heavy object you plan to add (no dirt bikes or quads).
P.S. Those "double" bunks will hold 2 people shorter than 5'4" and less than 125 lbs.
