7100 lb-rated new Silverado towing 4000 pounds

We tow a 4000 lbs trailer with an 1999 F150 with a four speed automatic. It tows fine, the engine isn't as powerful as a modern V6, and the gears don't give it a lot of choices.

Of course more engine is always be objectively better. It also costs more and uses more fuel when not towing. For us it comes down to how much of the time we tow. Then optimize for that while also considering it will do the other thing.