1999 Chevy Silverado fuel pump

Tiny
NYGIANTS68
  • MEMBER
  • 1999 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
No power to fuel pump. Will not run, replaced and new one won't run. Relays are ok. What next?
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Saturday, May 29th, 2010 AT 10:29 AM

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Tiny
INTERNETMECHANIC
  • MEMBER
Voltage to the fuel pump connector, gray wire, hot with engine cranking. Ground is black wire. If no voltage, check the circuits at the fuel pump relay. I don't care if the relay is good, check voltage and ground at the relay circuits. Voltage at the load/switch side of relay, is hot all the time. Voltage to the coil side goes hot with key in the crank position, that voltage comes from the pcm. The ground is constant for the coil side of relay. Use a digital multimeter to check for voltage. I don't care if you have checked those circuits a 100 times, I want the actual voltage reading, your going to have to test a 101 times. Sorry if I sounded cranky, hadn't had my second cup yet. Have a good day.


https://www.2carpros.com/forum/automotive_pictures/512072_48_fuel_pump_silverado_1.jpg

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Saturday, May 29th, 2010 AT 11:13 AM

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