Towed a fully loaded 21' bass boat and it's over 3,000 for sure possibly up to 3,800 and it does it, but not happily. Most concerning are the noises it makes while doing it, i'm sure it's fine but would hate to tow day in and out at anything over maybe 2,000lbs. The steering is also a bit too sensitive for me on the highway.
The Enclave and Acadia I were alot more content when towing and if you plan on towing alot and anything over 2k i would seriously consider a used Enclave or Traverse..the new Acadia is alot smaller now and not in the same category as the Ascent.
The suspension on Traverse and Enclave also seems alot better suited for towing as the Ascent seems to have a softer rear spring.
Possibly the best uni-body tow vehicle is the Durango with it;s optional V8 and 7,500lb rating. But in general not a fan of Dodge products. If i were towing everyday and wanted the convenience of a Uni-Body SUV i might have to get one.