My thought is something is not right somewhere. There is more than one Acadia\Traverse\Enclave being dinghy towed, so I would think if this was the norm, there would be at least one post about it on the forums I frequent. I would double check your connections.
Do you a search on here for Enclave, Traverse, or Acadia, send a message to those that posted, ask them if they have had the problem. The threads I read only mention the 3 fuses.
2007 Fleetwood Excursion 40E
2007 Chev Classic CC LB D/A - Toad
2013 Jeep Sahara Unlimited - Backup Toad