Need Help With Fuel Problem on 04" GMC Yukon

Discussion in 'General Chevy & GM Tech Questions' started by Junnie1975, Mar 21, 2013.

  1. Junnie1975

    Junnie1975 New Member

    I have a 2004 yukon xl flex fuel. I'm having fuel pressure problems. I am only getting 50 psi at key turn only and 40 at engine running. I change the fuel pump, fuel filter and fuel regulator. My yukon will not start at the first complete key turn from a cold start, but it will start the second time and as long as I don't let it off long it will start first crank. I tested the pressure yesterday and at turn key it goes to 50 psi,and quickly drop off to 0 psi. Can someone help me please

    99'HEARTBEAT MODERATOR Staff Member 5+ Years ROTM Winner 1000 Posts Platinum Contributor

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