Dodge Ram 1500, maybe

If it only has a bumper hitch, it probably doesn't have a tow package.

I would shop around for one with a tow package as they are so common, it shouldn't cost any more.

Why not get a Tahoe/Yukon that meets your towing needs? The 5.3/6sp with 3.42 would make a great tow vehicle for 4000lb. I had a Suburban this past weekend with this combination, and obtained 21 mpg for a road trip without a trailer. I have used this combination to tow as heavy as 8000lb.

Issue for the OP is not power, but the trans itself. It is geared better than the 4l80 derivatives, but still, compared to the newer closer ratios of the 6 spds, That alone makes for a better towing time.

Marty

First, it is cheaper and easier to get the proper towing package from the manufacturer. For pickups if it doesn't have a receiver - it doesn't have the upgraded towing package and I would not tow any high walled trailer. So find another example with the towing package. The included trans cooler is especially important.

Going from your 4.8L/4-spd to anything 2015+ will accelerate significantly better. With 6-8 speed transmissions and 50% more power from the 5.7L, or GM's 5.3L or Ford's 5.0L or Ecoboost, you'll be extremely pleased. So pick for favorite brand and get the proper towing equipment.

Ram does have the lowest payloads in the half ton class, so make sure the one you like has enough for your needs. Check out this sticker as test drive for as equipped payload.

Just picked up an Ecodiesel. Haven't towed yet, but man, it is comfortable.

Should be fine but keep an eye on the payloads. Rams have some of the lowest in the 1/2 ton class. Can be less than 1k in a loaded up crew cab.

In before the troller starts throwing stones.

4000 pounds shouldn't be much of a struggle for ANY of the V8s (or comparable engines) in the newer trucks. If you like your Tahoe except for the power, consider a newer one with the 5.3 and 6 speed tranny. BIG improvement over what you are currently driving.

In regards to the RAM, that 5.7 will tow it VERY well. Me personally, if I was only towing 4000 pounds, I would probably go EcoDiesel.

I'm towing a 4500lb TT with a 4.8L 3.23 Chevy Silverado and feel your pain. It gets the job done but let's you know it's not happy about doing it. Good luck with the new truck.