1992 GMC Sierra died and wont start

1992 GMC SIERRA
280,000 MILES • V8 • 4WD • AUTOMATIC
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WILLIAM CHUNICK
  • MEMBER
  • 2 POSTS
I have a 92 GMC 1500 4x4 with a 5.0l engine. I was drveing home and it just stopped running. I have spark. but the fuel pump is not comming on. I replaced it and the fuel relay. still not comming on.is the fuel system controled by somthing else? OH also the fuel fuse will have power only for 2 secounds and then goes dead, i was under the impresion it should always be hot. any help you can give would be awsome. thanks
Feb 23, 2008 at 5:31 AM
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MASTERTECHTIM
  • ✓Experienced Mechanic
  • 4,750 POSTS
the fuel pump is energized for 2 seconds to prime the system. then the fuel pump runs off the oil pressure sending unit combined with the fuel pump relay. check the oil pressure switch.
Feb 23, 2008 at 5:33 AM
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