1987 GMC Other Caballero fuel pump

1987 GMC
40,000 MILES
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CABALLERO87
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  • 1 POST
When I got the car it had been switched over to an electric fuel pump. After about a month it went out and I replaced it. Now it comes on but will not pump any fuel. There is no filter along the line just in the fuel pump itself and in the carb. Sometimes it will pump fuel and work for a day or two and other times it wont start up at all
Aug 2, 2013 at 12:15 PM
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CARADIODOC
  • ✓ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
If the pump was installed correctly it will have a means of turning it off when the engine stops running. That is to prevent a fire hazard if a fuel line gets broken in a crash. Usually on GMs that is done with a tap on the oil pressure sending unit. Low oil level can result in low oil pressure and a failure of the pump to switch on.
Aug 2, 2013 at 12:22 PM
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