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Not sure why blowing but if you can look in owners manual or chiltons to see what else is on the same circuit for example fuse #2 may have fuel pump and cigar lighter on the same circuit and if something metal falls into cigar lighter it will blow the fuse each time a new fuse is put in. Hope it helps. Also on my 1989 Chevy 2500 I had the same problem and I had a short in some wiring running along the driver side frame rail by the fuel filter.

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โˆ™ 2005-04-19 20:31:00
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Q: Why would a 1990 Chevy 2500 blow the ignition ECM fuse?
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