Tahoes, Yukons, and Denalis SUV are all built on 1/2 ton frame and are pretty short wheelbase for towing those kind of loads. One of the reasons I got rid of my Blazer quite some time ago after getting a travel trailer... Suburbans and Expeditions were custom made for this chore when built on the 3/4 ton frame.... get one with a Duramax if you can squeeze it in your budget. If not, the 6.0 is a great engine for towing in my experience... check out some of the online sellers like Carmax, Cargurus, and others and you should be able to find what you're looking for
