Question about 1999 GMC Suburban

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99 suburban wont stay on runs for 1 or 2 seconds then dies

Fuel presure is fine motor starts fine for 1 or 2 seconds then dies it starts up again but it does the same thing.

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  • jbenavides7 Jan 23, 2009

    Yes

  • jbenavides7 Jan 23, 2009

    I replaced the fuel relay and the fuel filter,checked all fusses pump press.and everyting looks fine.

  • jbenavides7 Jan 23, 2009

    They asked if i have changed a little electronic box called a BODY MODULE in the stering colum has any boddy had this problem.

    Your help is greatly apreciated

  • ralph37 Jan 30, 2009

    died as i was driving. started again then died. Then sat for awhile, then started for 1 or 2 seconds then died.

  • jbenavides7 Feb 06, 2009

    I have found the problem when i was checking the fuel presure i used an old fuel presure tester and was reading 35 psi. at the time i thought it was probably higher since the tester was old, not knowing it had to have 60 to 65 psi to push through the injectors.

    The problem bad fuel pump the pump was only pushing 35 psi. insted of 60 to 65. New pump $257.00 at Auto Zone and it came with the new color coated plug you have to replace.

    P.S -Its not hard to replace but you have to bring down the gas tank. Thx for everybodys help.

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Have you checked the electrical portion of the egnition yet?

Posted on Jan 30, 2009

  • Becky Bishop Jun 30, 2013

    this is a Toyota not a GM different set of problems

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  • Master
  • 1,990 Answers

Have you Checked the Fuel Filter????

Posted on Jan 23, 2009

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  • Travis Humphries
    Travis Humphries Jan 23, 2009

    Have you checked all of the Relays under the Hood in the Fuse Distribution Block???? Find a Relay that you know to be good and Swap it around until you can Start it. Usually works after you have replaced everything that you have already.

  • Travis Humphries
    Travis Humphries Jan 23, 2009

    Look at the Fuse Panel inside the Cab and see if the ECM Fuse is in there or under the Hood. Find this Fuse and Pull it for 1 Hour. After you pull this fuse turn the Key to the start psition But, DO NOT Start. This should clear any codes that the Comuter has Stored. This is the Last line of Defense that I have in My arsenal.

  • Travis Humphries
    Travis Humphries Jan 23, 2009

    There is one mounted on a Wiring harness under the Dash on the Steering Column But, I have never had to Change one Before.

  • Travis Humphries
    Travis Humphries Feb 06, 2009

    No Problem! Happy To Help!

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