After replacing the fuel pump it still has low fuel pressure?

2004 GMC YUKON
200,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC
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EDDIE_14
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  • 3 POSTS
I replaced my fuel pump, but I still have low to no fuel pressure, and my engine will not start.
Sep 30, 2023 at 8:27 AM
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AL514
  • CAR REPAIR CONTRIBUTOR
  • 5,502 POSTS
Hello, do you have dual fuel tanks on your vehicle or just a single? And have you checked for power back at the fuel pump connector? I'll post some diagrams for you to check.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit
Sep 30, 2023 at 9:06 AM
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EDDIE_14
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It’s just a single, and yes it has power, it will pump it just doesn’t have any pressure.
Sep 30, 2023 at 9:10 AM
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AL514
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What pressure reading are you getting with just the key on first prime?
Sep 30, 2023 at 9:23 AM
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EDDIE_14
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It’s okay, my dad finally figured it out, thanks for the information though.
Sep 30, 2023 at 9:24 AM
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AL514
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  • 5,502 POSTS
Okay.
Sep 30, 2023 at 9:26 AM
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RENEE L
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Can you please let us know what the issue/repair was, it may help other people experiencing this issue with their vehicle? Thank you!
Oct 1, 2023 at 11:30 AM
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