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    A little help with my son’s 2003 Tahoe

    Hmmm. It did something like this once before. A few months ago. Due to another part busting last summer, he filled the radiator up with water to get it home. He never drained it and filled with antifreeze. We had a cold snap for a few days a few months ago and it wouldn’t crank. Changed battery...
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    A little help with my son’s 2003 Tahoe

    Ok. I took half the day off to try and trouble shoot it and it started right up. Could it be the security system causing it to lock itself out?
  3. A

    A little help with my son’s 2003 Tahoe

    Lol. I work long hours and I really don’t have a lot of time to mess with it. But if we can’t figure it out this coming weekend, it’s getting hauled to the shop.
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    A little help with my son’s 2003 Tahoe

    The pump doesn’t come on at all. We had it come on once when it was hot wired. So what I’m thinking is when the switch is turned on, it’s not sending the signal to the fuel pump to turn on. I don’t know. This is making me real curious about finding it out. My son needs his vehicle soon so...
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    A little help with my son’s 2003 Tahoe

    We could hear it come on and it was getting fuel to the regulator on the rails. There wasn’t any gas to the rails at all before that.
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    A little help with my son’s 2003 Tahoe

    I don’t think I’ll do all of that. Lol. Something crazy would happen and I would probably burn it up
  7. A

    A little help with my son’s 2003 Tahoe

    I picked my son up after work today since I had some day light left. Tried cleaning the connectors to the computer. Didn’t work. I started jiggling some of the wires around to see if I could find a short and get the power back to the fuel pump and now it just clicks when you try to turn it...
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    A little help with my son’s 2003 Tahoe

    It’s more of I don’t know what’s causing the issue. Lol First we thought fuel pump. No power to the pump. Changed pump and still doing it. So we straight wired the new pump and worked great but won’t start up. It will try turning over sometimes and sometimes it won’t. Grabbed another ecm...
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    A little help with my son’s 2003 Tahoe

    Ok thanks! We probably won’t tinker with it until next weekend because it’s at my fathers house and with my work hours I won’t have time til then.
  10. A

    A little help with my son’s 2003 Tahoe

    I don’t think it’s the wiring of the fuel pump that’s bad. We changed out the ignition switch thinking it may be it. I was wrong about changing it earlier. It was the ignition lock. I couldn’t remember, anyways that wasn’t the cause. We bypassed the relay and and had full voltage on the lines...
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    A little help with my son’s 2003 Tahoe

    Yeah. I would take all the info I can on what to check with a meter.
  12. A

    A little help with my son’s 2003 Tahoe

    we changed the ignition switch about a year ago. I guess it could have gone bad in that time. We’ll check everything you suggested and maybe replace the switch again.
  13. A

    A little help with my son’s 2003 Tahoe

    Thanks for the reply! Yes. The battery is good. It is only about 2 months old. The pump ran when it was hot wired. I’ll look over the video and try that when we get back to it.
  14. A

    A little help with my son’s 2003 Tahoe

    Hello, my son is having a little trouble out of his 2003 Tahoe. It died on him the other day and we suspected fuel pump because we didn’t hear the pump coming on. We replaced the pump but still no power to pump. Today we hot wired the pump to get it to run but it would still not crank. All fuses...

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