How rugged should I expect the ENVOY to be ???????

I seen a GMC ENVOY for sale . Year , I don't know . Are they stout enough to tow a camper ? Are the 4 wheel drives just toyish or good winter transportation ? I need a more economic ride than my Ford Expedition . What do I look for as far as weaknesses go with the ENVOY'S ? How are their transmissions ?

Thank you for your input ,
Gonzo