Few unknowns here.
What was the trucks towing capacity.
What was the trucks payload.
What was the weight of the trailer...not the GVWR, the GVW. GVWR is your friend. The bigger the better. It is not necessarily a reflection of the weight of the trailer. An Arctic Fox 25R has a dry weight (GVW) of 6045 pounds. Loaded probably around 7500 pounds. The GVWR is 10,000 pounds. That means it is sitting on some very stark axles. Would you rather have a 7500 pound loaded trailer sitting on axles rated for 8000 pounds or 10,000 pounds. GVWR is one number to consider, but generally the bigger the number the better for any given trailer weight. There are lots of half tons that would have no problem with a 7500 pound trailer.
Might be more to the story here.
JMHO