Originally Posted by SmokeyWren
You're not paying attention. Expeditions and Tahoes are half-ton vehicles, and will probably be overloaded when on the road with your family and the wet and loaded trailer. They're marginally better than the Durango, which is based on the less-than-half-ton Dodge Dakota pickup (which has been cancelled).
Although a Tahoe is a shorty Suburban, it does not come in the 2500 version. So go straight to the Suburban 2500 (or the GMC equivalent Yukon XL 2500).
I'm not really seeing how she'll be overloaded just because it's a half-ton. She's pulling a Crossroads Zinger 25RK as noted in her other thread. It has a total length of 26'9", a dry weight of 4,640lbs and a GVWR(larger axles) of 7580 and a hitch weight of 580lbs. The payload capacity of her trailer is overkill at 2,700 lbs. You'll never load a trailer up that much even with a full tank of water unless you have a toy hauler. Realistically, as long as she's mindful of how much she loads into the trailer, and the dry weight is reasonably within range, she should be towing around 6000-6500lbs tops.
I just realized the tahoe and yukon of that era have a smaller 4.8L V8, the tow rating is very comparable to the durango and probably not enough.
With that said, i'd probably stay away from the older tahoe and yukon. The 2003 expedition doesn't look too bad as long as you get the 5.4L with the tow package. Also the suburban has a payload of 2,077lbs, and so does the yukon XL. All 3 have tow ratings well above what you need as long as it came factory with the full HD tow package. The suburban and Yukon XL have longer wheelbases which allow it to control the load much better. The Expedition is near it's max length with a 26 foot trailer, i wouldn't get a trailer any longer than that should you ever decide to upgrade.
There is a difference between towing adequately and towing exceptionally well. 3/4 trucks are nice for towing and do it exceptionally well. But i tow my personal stuff with a half ton and it's fine but you'll know you're towing. Just make sure you know your limits and use a WD hitch. Meanwhile at work i tow with 5500 and 3500 series trucks which make it feel like nothing is back there.