Purchased this vehicle used with 4,500 miles. Currently has 171,000 and still only uses a quart of oil every 3K. For this size vehicle fuel economy is excellent. I just from a 1,500 mile trip and averaged 17.9 mpg traveling at an average speed of 72 mph (5.7L Gas). Most unusual repair was replacement of intake manifold gasket (75K), this appears to be an issue with many Chevy models other in addition to Suburban. I have done many expected repairs, water pump, fuel pump, u-joints, radiator (plastic sides tanks are silly). Brakes, rotors and drums are an issue. Brake system probably undersized for weight of vehicle.
Interior room is excellent, great for long distance travel with 5 or more passengers. Plenty of cargo space for luggage/other items.