My buddy found a new 28' TT that he really wanted to buy. He really didn't want to get a 3/4 ton truck. I can't recall the hitch weight but it seemed pretty heavy to me. The salesman told him he could get a Tahoe and it would pull it great, just make sure the Tahoe had the bigger engine.
He found a gently used Tahoe with all the bells and whistles. He pulled the new TT two or three times and has blown out the OEM air suspension on his Tahoe twice. Now the TT just sits in the CG, no more traveling.
Yes, some salesmen will tell you anything to make the sale.