Question about 1999 GMC Suburban

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1999 suburban starting problem

I have the exact same problem you described. it starts, then won't start again, but instead runs one second and stops. I can attempt to start it dozens of times and it still only catches and runs for one second. let it sit for an hour and it starts fine. Is intermittent but getting much worse. once started, it runs fine until I turn it off again. Have you solved it? if so, can you share any info to help me out?

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  • shannenpope Dec 27, 2008

    If you could pass along any solutions I would appreciate it. My 99 suburban is doing the exact same thing.

    Thanks,

  • lw_weger Dec 30, 2008

    Same problem. I attached a fuel pressure gage because I was being told (repeatedly) it was the fuel pump. However, the pressure was normal, and did not drop too fast when the truck just sits. I don't think it is a fuel pump or regulator. If I figure it out - I'll post it.

  • fortyniner73 Jan 02, 2009

    I have the same problem. It has been happening only since I changed the fuel pump. I can hear it running, so I dont know if its the pump. Mechanic suggested it might be the two rear cylinder injectors leaking. It's around $1200 to replace it, so I'm hoping thats not it. If anyone figures it out, please let me know.

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It is possibly a PASSLOCK problem. Before you start the vehicle, place ignition in RUN and observe the "SECURITY" light. Under normal conditions, it should go out after about 5 seconds. Once the PASSLOCK is activated, the vehicle wil not start for 10 minutes. If you have access to a OBD-II code reader, you will see a code stating a problem with the security feature, code P1626. The problem is most likely a intermittant failure of the contact in the ingnition switch responsible for this signal.

Posted on Jan 06, 2009

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It's the ignition switch on the colum. I found it too hard so I took it to a shop. It's around $150 for the part. The shop said its a fairly common problem.

Posted on Jan 07, 2009

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Get the fuel pump checked out . Make sure there is enough presure making it up to the injecters, also replace the fuel filter. The problem will only get worse and then it won't start at all.

Posted on Dec 30, 2008

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