Help me please? I have a 2002 Silverado Ex. Cab Z 71 with 19,200 miles on it. Obviously, I don't drive it a lot. Saturday, I started the truck in my garage and put it in gear. The engine started and immediately quit. I started it several times and it would start right up, but would not idle, either in gear or in neutral. If I accellerated, it would run and drive, but it would die if I took my foot off the gas. Also, I noticed that when I filled it up with gas, the mpg had deteriorated from 15-17 to 12-13. While trying to determine where to go to get this checked, I decided to replace the fuel filter, even though the current filter had been put on 3000 miles ago. Surprise! I started the truck to get it outside to work on it and the thing ran fine. I went ahead and changed the fuel filter, but I am worried that this will happen again. Has this happened to anyone else? Any insight into this problem would be very much appreciated. Thanks in advance.