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1995 GMC Vandura 2500 Question: I just pulled the diagnostic codes on my van. It gave me a 4 or 44. that means?

 

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Darqness, Clairton, PA, December 23, 2012, 08:17
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My van started to chug Friday night after a fairly lengthy trip. This morning, I pulled the codes to find out what the problem was. It gave me either a 4 or a 44. I'm unfamiliar with that code.

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