Newbie towing capacity question
I am about to purchase a 2015 Windjammer 3006WK but am not sure my truck can tow it! I assumed since my truck's max tow rating was 9500lbs, I could easily tow the 3006WK (GVWR 8750lbs); however, after using the towing calculator it seems I can only tow 3700lbs?? I need help trying to figure all of this out. I just bought this truck in order to tow an RV as my old F-150 could not do the job. I don't think the RV dealer is going to do these numbers for me.
Here are all the numbers I know...
2013 GMC Sierra 1500 V8 5.3L:
Max loaded trailer weight rating 9500
Tongue max ?? I am assuming 1100 (not sure where to find that)
2015 Windjammer 3006WK (Platinum pkg):
Dry weight 7197
Cargo Cap 1553
Dry hitch 915
Thanks in advance!!