99 FUEL PUMP PROBLEM

1999 GMC Yukon

Tiny

ellobo11

July, 1, 2011 AT 7:06 PM

I have a 99 yukon that I changed the fuel pump on. Car will turn over but no fuel from the pump, checked at the plug and no electricity, changed the relay and checked fuses but still no elect

FOUND 10188 RELATED QUESTIONS

1 Answer

Tiny

JDL

July, 1, 2011 AT 7:39 PM

Engine cranking, do you have spark at the plugs and injector pulse? If your missing everything, check the crank sensor. The computer has to see an rpm signal. Any applicable trouble codes? How long since a tune-up?

The red wire in the diagram is a fuel pump test connector. No need to use the key. Use jumper wire from battery voltage to red wire connector, the pump should run. You should use an inline fuse with that. When you checked the applicable fuse, did you use a voltage tester?

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