I have a 2002 1500 Suburban. Bought new. 205K miles. Have replaced fuel pump and rear diff in that period. Wouldn't think twice about driving it cross country.
Wife has 2008 Tahoe. Just crossed over 100K. No work other than maintenance. Would've inherited this one but it doesn't have enough space for my track stuff, plus I like the longer wheelbase for towing. We just went to on vacation with three teenagers. Couldn't fit the family and all the luggage in the Tahoe. Suburban carried all five of us plus 14 pieces of luggage in the back.
Would love to get a newer one but I've really gotten used to not having a car payment