Well, until I get a trailer I am flat towing my junk around with my 2006 Nissan Frontier. I average between 10-11 MPG and it does great in the most extreme weather conditions! I love it. I'll grab a better picture, but this is one form this weekend in Anza Borrego.
I used to tow with an 86 Chevy 3/4 ton 2wd 350 small block and it towed pretty well just a bit slow over mountain passes, but I recently bought an 08 Chevy Duramax/Allison 1 ton LTZ, and a 06 Lance 915 camper. I dont have any pic's of the trailer since its My Dad's and we are currently rebuilding it. (making it longer)
03 Rubicon on 36's and LONGFIELD CV's
We could not afford a 3/4 diesel like I wanted, especially with diesel prices. We settled on a Chevrolet CC 1500 2WD TX edition with tow package. Didn't get the 6.0 but the 5.3 does pretty good and gets better milage than the 4.8L. Gets about 11mpg towing the buggy on a 16' lowboy. Couldn't pass up almost 30% off sticker.
Trying to design a trailer/camper to haul the jeep that sticks close to the 6800lb towing capacity.
2002 Durango R/T ... as yet to be used for towing the XJ. I'm chicken.
Well, I need not have worried. Loaded her up 2 weeks ago, hauled the ol' XJ 5 hours to Rausch Creek and came back 4 days later without so much as a hiccup. Averaged 11.5 mpg and I was plenty happy with that.
The Durango barely noticed it was back there on the 16' trailer.
02 Ram 2500 diesel twin turbos, 5" duals, Dynatrac front axle with detroit lockers front and rear 4:30 ratio. Same truck I use for super street truck pulls when I am in NC. 20' lowboy for hauling the jeep or tractor on.
A little overkill but so is the jeep.
I have an '07 Ram 1500 quad cab with 5.7 hemi and tow package with 3.92 gears. Did very well with my XJ (probably 3200-3400ish lbs and the 2000# uhaul car hauler) when I pulled it 30 miles to a wheeling event last month. Mileage was around 13-14 on the highway with almost no city driving.
I stepped up from a GMC canyon because it was not up to pulling my 3500# boat, and you can barely tell the boat is back there.
I did the same thing with an 02 F-150 5.4L a few years ago and it seemed like such a dog (pulling exact same combo - and my jeep is heavier now). I also averaged 10 mpg that trip, although I think that Ford had some tranny issues and is why I unloaded it.
The Ram does well though. I almost bought a diesel, but I only tow 2-3 times a year short distances (30-40 miles one way), so I couldn't justify the extra cost of the engine let alone the fuel costs. I could pay for my fuel for 4-5 years just for the added cost of a cummins.
Now if you tow on a regular basis, getting a diesel might be justifable, but you have to factor in the extra cost of the engine, the added upkeep (15 qt oil changes, fuel filters). Although a diesel does peg the scale on the cool factor IMO. I just have other things I need to spend money on.
I'm sure a Tahoe with the 5.3 vortec would do fine pulling a TJ, or even a 6.0L LS truck engine (which has a lot of torque) if the tahoe comes with one.
EDIT: We recently purchased a 30 ft travel trailer, weighing in about 5500 lbs. The Ram did very well, although the togue weight causes some noticable bobbing on bumpy roads. Power was adequate on the highway with enough torque for hills and decent acceleration in 3rd gear for passing. I did buy a set of clip on mirrors from e.trailer to help me see around the trailer on the highway. The truck sits about level with the trailer on. I am considering a set of firestone airbags to pick the backend up a little.