its exactly the same, except for about 18 inches the suburban is roughly 18 inches longer, (kind of varies from year to year) and about 1,500 lbs heavier than a blazer, but the suburban holds more, hauls more, pulls trailers better because of the weight difference and longer wheelbase, 4x4 better, due to wieght but the gas mileage is not as good, depending on which engine is in the suburban. I have had both, and the suburban wins out in my book, but to each his own