Question about 2000 GMC Safari

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WONT START AFTER DRIVING. WAIT 1 HR THEN STARTS, HAVE REPLACED FUEL PUMP, TUNED UP AND CHANGE FUEL FILTER. TRIED BANGING TANK. HAPPENS WHEN WEATHER HOT AND HUMID

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I had the same issue with my 1997 Astro and it was the crank position sensor. It would loose power if I were driving and shut down once it slowed down or just shut off if idling or at a light. It would them not fire back up until it cooled off. Hope this is of good help.

Posted on Aug 16, 2009

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Check main relay for rust and high resistance. Ask a car mechanic to check if yo are not sure. Tell him that you intend it to be checked preferentially.

Posted on Jul 26, 2009

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This sounds like a bad ignition module. They can be tricky to diagnose. You said it would give more trouble on hotter or very humid days. These are tale tale signs that it is in the beginning stages of failure. Pull it off and have it tested at your local auto parts store. These are usually tested for free. Make sure they test it several times to warm it up. Remember it doesn't have the problem until it is hot. Hope this helps. Good luck.

Posted on Jul 26, 2009

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