GM SUV Quality opinions wanted. Maybe expedition ecoboost.

I own a 2009 suburban with 330,000 miles on it , still feels new and tight. I am very impressed with the 17 to 18 average mpg and can get 20 on the highway. I love suburbans, and have had every kind from 94 on. From diesels to big block 8.1 . The 5.3 is the most common to me , and feel they are very strong and low maintenance.