I've always liked those Blazers too. I'm not sure how gas mileage might be either. But hey those Blazers have been customized to be real fast trucks. Some guys have done an engine swap, like drop a 350 V8 in that bad boy. Look it up on YouTube to see what I mean. But if you really like it, then get it. Besides, I think they are pretty reliable. I still see some on the road every now and then.