fuel pump pressure

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by Jim Beard, Jan 2, 2012.

  1. Jim Beard

    Jim Beard New Member

    fuel pump pressure indicates 55 psi...the only info I have says it needs 66psi, anyone have any other numbers?....1999 5.7 liter gasSuburban

    ---------- Post added at 04:43 PM ---------- Previous post was at 04:33 PM ----------

    and WHERE is the fuel pressure regulator on this truck?
  2. Boonduff

    Boonduff Rockstar 4 Years 100 Posts

    The regulator is attached to the fuel injection manifold, to get at it you need to remove the upper plastic portion of the intake manifold. Fuel pressure on these trucks usually runs at about mid 50s and up when running. 60 to 66psi should be seen when performing the key on test.
  3. Jim Beard

    Jim Beard New Member

    Well it says only 55psi with the key on test...it read 54 before I replaced the fuel filter and 55 after....I guess I will have to lay out the money for a new fuel pump.....well, you can't take it with you!

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