I have a '91 S10 Blazer with the 4.3L V-6 with over 360,000 miles. I have just replaced the fuel pump, sending unit, filter and lines from the sending unit to the hard lines at the frame. The truck started right up and ran great for about 2 days. Then, it died and will not start again. Does anyone have any ideas about what I need to check on it? I'm at a loss on what it could be. Thanks for any help sent.