With an oil change documented every 3- 5 thousand miles, my trusty GMC Savanna extended 1-ton cargo van came to a grinding halt at 60,600 miles (less than 2 years old). I had the old 5.7 engine replaced with a new one by a GMC dealer. Out of pocket was a total of $6,400. GMC said it was not their problem. I am stuck. I am now persuing samll claims court. How long should an engine last? I usually can have upwards of 200,000 miles without incident. After owning 14 GM vehicles, I found the loyalty stops with me.