What is making my van shut off right after it starts?

2000 GMC SAVANA
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CHAPMAN
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I have replaced to fuel pump, regulator, filter, and tested the pressure at cranking it's 60-65 pounds. It will run fine if I'm spraying carb starter in. Spark is great and I tested all the fuses and everything there is fine.... No leaks in vacuum lines. Please tell me what I'm missing.
May 23, 2012 at 4:37 AM
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SATURNTECH9
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Is your security light on or flashing?
May 23, 2012 at 6:42 AM
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CHAPMAN
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The security light comes on when you turn the key and then goes out
May 23, 2012 at 5:02 PM
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SATURNTECH9
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Do you have any codes in the computer?
May 23, 2012 at 5:30 PM